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WO2009113601A1 - Alliage de magnésium-lithium, matériau laminé et article moulé - Google Patents

Alliage de magnésium-lithium, matériau laminé et article moulé Download PDF

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Publication number
WO2009113601A1
WO2009113601A1 PCT/JP2009/054714 JP2009054714W WO2009113601A1 WO 2009113601 A1 WO2009113601 A1 WO 2009113601A1 JP 2009054714 W JP2009054714 W JP 2009054714W WO 2009113601 A1 WO2009113601 A1 WO 2009113601A1
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Prior art keywords
mass
alloy
magnesium
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present
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Japanese (ja)
Inventor
崇之 後藤
裕司 谷渕
幸弘 横山
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Santoku Corp
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Santoku Corp
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C23/00—Alloys based on magnesium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon

Definitions

  • the present invention relates to a magnesium-lithium alloy excellent in corrosion resistance and cold workability, a rolled material and a molded product thereof.
  • a rolled material of AZ31 Al 3 mass%, Zn 1 mass%, remaining Mg
  • the magnesium-lithium alloy containing lithium has a magnesium crystal structure of hcp structure ( ⁇ phase), but when the lithium content is 6 to 10.5% by mass, the hcp structure and bcc structure ( ⁇ phase) When the lithium content is 10.5% by mass or more, a ⁇ -phase single phase is obtained.
  • the ⁇ phase slip system is limited, but the ⁇ phase has many slip systems, so the lithium content is increased and the ⁇ phase and ⁇ phase mixed phase, the ⁇ phase single phase and As it becomes, the workability in the cold improves.
  • lithium is an electrochemically base element, there is a problem that the corrosion resistance is remarkably lowered as the lithium content is increased.
  • alloys with high Li content such as LA141 (Li 14 mass%, Al 1 mass%, balance Mg) have been developed. However, the use of this alloy is limited due to the problem of corrosion resistance.
  • Patent Document 1 discloses that a magnesium-lithium alloy containing 10.5% by mass or less of lithium and having an iron impurity concentration of 50 ppm or less has excellent corrosion resistance.
  • Patent Document 2 discloses that a magnesium-lithium alloy containing 6 to 10.5% by mass of lithium and 4 to 9% by mass of zinc is excellent in strength and corrosion resistance at room temperature.
  • Patent Document 3 discloses a cold-pressable magnesium-lithium alloy containing 6 to 16% by mass of lithium.
  • Patent Document 4 describes that a magnesium-lithium alloy containing 10.5 to 40% by mass of lithium and having an average crystal grain size of 3 to 30 ⁇ m is excellent in strength and press workability.
  • Non-Patent Document 1 describes the effects on mechanical properties, corrosion resistance, etc. due to processing and heat treatment when Al, Zn, Cu, and Ag are added to a magnesium-lithium alloy of 8% by mass and 13% by mass of lithium. Yes.
  • Patent Document 4 describes a magnesium-lithium alloy having excellent strength and press workability. In the example, the tensile strength of Li containing 10.5% by mass or more is at most 131 MPa. is there.
  • Patent Document 4 as a method for producing a magnesium-lithium alloy having excellent strength and press workability, an ingot of a lithium-magnesium alloy raw material is hot-rolled, followed by cold-rolling, A method for recrystallizing a lithium-magnesium alloy by heat treatment at 140-150 ° C. is described. In addition, in this method, it is described that in the cold rolling, when the rolling reduction is as high as 30 to 60%, a better rolling material can be obtained than when the rolling reduction is as low as 20 to 25%. Yes.
  • An object of the present invention is to provide a very light magnesium-lithium alloy, a rolled material, and a molded product thereof that have both corrosion resistance and cold workability at a high level and have a certain degree of tensile strength. .
  • the average grain size of Li is 10.5% by mass or more and 16.0% by mass or less, Al is 0.50% by mass or more and 1.50% by mass or less, and the remainder contains Mg.
  • a magnesium-lithium alloy (hereinafter sometimes referred to as Mg-Li alloy) having a tensile strength of 150 MPa or more is provided.
  • Mg-Li alloy having a tensile strength of 150 MPa or more is provided.
  • An Mg—Li alloy having a diameter of 5 ⁇ m or more and 40 ⁇ m or less and a Vickers hardness (HV) of 50 or more is provided.
  • a rolled material or a molded product made of the above-described magnesium-lithium alloy is provided.
  • the alloy raw material melt containing 10.5% by mass or more and 16.0% by mass or less of Li, 0.50% by mass or more and 1.50% by mass or less of Al, and Mg in the balance.
  • the Mg—Li alloy of the present invention has a high level of both corrosion resistance and workability such as cold pressing in spite of containing 10.5% by mass or more of Li, and has a lower specific gravity than Mg. Since it contains a large amount of Li, it is excellent in practicality and lightweight, and can be expected to be used in various application fields.
  • 2 is a copy of a photograph showing the state of a test piece prepared in Example 1 before a 5% salt spray test.
  • 2 is a copy of a photograph showing the state of the test piece prepared in Example 1 after a 5% salt spray test.
  • 2 is a copy of a photograph showing the state of a test piece prepared in Comparative Example 1 before a 5% salt spray test.
  • 2 is a copy of a photograph showing the state of a test piece prepared in Comparative Example 1 after a 5% salt spray test.
  • the present invention is described in further detail below.
  • Li is 10.5% by mass or more and 16.0% by mass or less, preferably 13.0% by mass or more and 15.0% by mass or less
  • Al is 0.50% by mass or more
  • 1.50 mass% or less is contained
  • Mg is contained in the remainder.
  • Li is larger than 16% by mass, the corrosion resistance and strength of the obtained alloy are lowered and cannot be practically used.
  • By containing Al within the above range mechanical strength such as tensile strength and Vickers hardness of the obtained alloy is improved.
  • Al is less than 0.50 mass%, the effect of improving the mechanical strength of the obtained alloy is not sufficient.
  • it is larger than 1.50% by mass the workability in the cold of the obtained alloy is remarkably lowered. Since the Mg—Li alloy of the present invention contains Li in the above content ratio, the crystal structure is a ⁇ -phase single phase, and it is lightweight and excellent in cold workability.
  • the Mg—Li alloy of the present invention further improves corrosion resistance by containing Ca in a range of 0.10% by mass to 0.50% by mass.
  • Ca is contained, a compound of Mg and Ca is formed, which becomes a starting point for nucleation during recrystallization, and forms a recrystallized texture having fine crystal grains.
  • Corrosion of the Mg—Li alloy proceeds selectively within the crystal grains, and the grain boundaries can prevent the progress of corrosion, and the formation of such grain boundaries can improve the corrosion resistance.
  • the Mg—Li alloy of the present invention has at least one selected from Zn, Mn, Si, Zr, Ti, B, Y, a rare earth metal element having an atomic number of 57 to 71, in addition to Al and Ca described above. It can be contained in a range that does not significantly affect the corrosion resistance and cold workability. For example, when Zn is contained, the cold workability is further improved. When Mn is contained, the corrosion resistance is further improved. When Si is contained, the viscosity of the molten alloy at the time of manufacture can be lowered. Inclusion of Zr increases the strength. When Ti is contained, flame retardancy is improved.
  • the strength at a high temperature is increased, but when it is contained in an amount of 1% by mass or more, the strength and the workability in the cold state are reduced.
  • the rare earth metal element is contained, the elongation rate is improved and the cold workability is further improved.
  • the content of these optional components is preferably 0% by mass or more and 5.00% by mass or less. If the content is large, the specific gravity increases and the characteristics of the ⁇ -phase single-phase Mg—Li alloy are impaired. Therefore, the content is preferably as small as possible.
  • the Mg—Li alloy of the present invention may contain impurities such as Fe, Ni, and Cu.
  • impurities such as Fe, Ni, and Cu.
  • Fe is 0.005 mass% or less
  • Ni is 0.005 mass% or less
  • Cu is 0.005 mass% or less.
  • the average crystal grain size of the Mg—Li alloy of the present invention is 5 ⁇ m or more and 40 ⁇ m or less, and the average crystal grain size is preferably 5 ⁇ m or more and 20 ⁇ m or less from the viewpoint of excellent corrosion resistance.
  • the average crystal grain size is smaller than 5 ⁇ m, it is industrially difficult to obtain the Mg—Li alloy of the present invention having a tensile strength of 150 MPa or higher, or a Vickers hardness of 50 or higher, and when it exceeds 40 ⁇ m, the corrosion resistance decreases.
  • the average crystal grain size can be measured by a line segment method using an observation image of an alloy cross-sectional structure with an optical microscope.
  • the Mg—Li alloy of the present invention has a tensile strength of 150 MPa or more, or a Vickers hardness of 50 or more. These upper limits are not particularly limited, but the tensile strength is usually 220 MPa or less, preferably 180 MPa or less, and the Vickers hardness is usually 80 or less, preferably 70 or less, in order not to deteriorate cold workability. In the present invention, the tensile strength is determined by cutting out three JIS No. 5 test pieces each having a thickness of 1 mm in three directions of 0 °, 45 °, and 90 ° from arbitrarily determined directions of the plate material made of the Mg—Li alloy of the present invention.
  • the tensile strength of the obtained test piece can be measured at 25 ° C. at a tensile speed of 10 mm / min. And each average value of 0 degree, 45 degrees, and 90 degrees directions is calculated, and those maximum values are made into tensile strength.
  • the Vickers hardness is measured in accordance with JIS Z 2244, arbitrarily measured at 10 points with a load of 100 g weight at 25 ° C., and the average value is obtained.
  • the present inventors have heretofore reported the average crystal grain size and the tensile strength or Vickers hardness of a ⁇ -phase single-phase Mg—Li alloy containing the above-mentioned amounts of Li and Al, such as LA141, which has been reported to have low corrosion resistance. Was found to significantly improve the corrosion resistance while maintaining good cold workability of the resulting alloy.
  • the corrosion resistance of the Mg—Li alloy of the present invention exceeds the corrosion resistance of AZ31 not containing lithium, which is one of the causes of corrosion, which is currently industrialized as a plate material.
  • the ⁇ -phase single-phase Mg—Li alloy containing Li and Al has been reported for many years, it has hardly been put into practical use due to low corrosion resistance.
  • the -Li alloy has industrial utility.
  • the above-described AZ31 that is put into practical use requires warm pressing at about 250 ° C., but the Mg—Li alloy of the present invention is excellent in cold workability and is equal to or higher than AZ31. Since it has corrosion resistance, it can be expected to be used in a wide range of fields.
  • the mechanical strength of a ⁇ -phase single-phase Mg—Li alloy containing Al is not uniquely determined if its composition and average crystal grain size are determined.
  • a cast slab is subjected to plastic strain by being performed at a specific reduction rate or more, and then annealed in a specific temperature range to give a recrystallized texture.
  • the average crystal grain size is 40 ⁇ m or less, high tensile strength and / or Vickers hardness that are not conventionally provided are imparted.
  • Patent Document 4 the method was described in the above-mentioned Patent Document 4 in which the composition and the average crystal grain size were similar to those of the Mg—Li alloy of the present invention, which was similarly manufactured by hot rolling, cold rolling and heat treatment.
  • the alloy of Example 6 has a low tensile strength of 127 MPa, and is very inferior in corrosion resistance and poor in practicality as described in Comparative Example 1 described later.
  • Patent Document 4 when the average crystal grain size is increased in the Mg—Li alloy, a good rolled material cannot be obtained. Therefore, it is described in this document that the heat treatment (annealing) of the recrystallization process in which grain growth occurs cannot be performed at a temperature exceeding 150 ° C.
  • annealing the heat treatment of the recrystallization process in which grain growth occurs cannot be performed at a temperature exceeding 150 ° C.
  • it is considered that such conventional recognition has hindered the practical application of ⁇ -phase single-phase Mg—Li alloys for many years.
  • the inventors of the present invention have provided a ⁇ -phase single-phase Mg-Li alloy containing Al, which has given a reduction ratio of a certain degree or more in cold plastic working such as cold rolling, in which the physical properties have been lowered in the annealing process. Then, by recrystallizing in a specific range of a high temperature which has been recognized, an average particle size not previously achieved in this composition is 5 ⁇ m or more, 40 ⁇ m or less, and a tensile strength of 150 MPa or more or a Vickers hardness of 50 or more. It has been found that the alloys shown can be obtained, and that such alloys can achieve high levels of corrosion resistance and cold workability, which are industrially practical.
  • the method for producing the Mg—Li alloy of the present invention is not particularly limited as long as the Mg—Li alloy of the present invention having the above composition and physical properties can be obtained.
  • the production method of the present invention shown below is mentioned.
  • the production method of the present invention is an alloy raw material melt containing 10.5% by mass or more and 16.0% by mass or less of Li, 0.50% by mass or more and 1.50% by mass or less of Al, and Mg in the balance.
  • step (a) for example, first, a raw material in which a metal and a master alloy containing the above-mentioned optional component elements such as Mg, Li, Al, and optionally Ca, are mixed to have the above-described composition is prepared. Subsequently, the raw material can be heated and melted to obtain an alloy raw material melt, which is cast into a mold and cooled and solidified. A method of cooling and solidifying the alloy raw material melt by a continuous casting method such as a strip casting method is also preferably performed.
  • the thickness of the alloy ingot (slab) obtained by the step (a) can usually be about 10 to 300 mm.
  • the production method of the present invention includes a step (b) of plastically processing the alloy ingot obtained in the step (a) in a cold manner so that the reduction rate is 30% or more.
  • the plastic working can be performed by a known method such as rolling, forging, extrusion, drawing, etc., and strain is given to the alloy by this plastic working.
  • the temperature at that time is usually about room temperature to 150 ° C. It is preferable to carry out at room temperature or as low a temperature as possible in order to impart a large strain.
  • the rolling reduction in plastic working is preferably 40% or more, more preferably 45% or more, and most preferably 90% or more, and the upper limit is not particularly limited.
  • the rolling reduction is less than 30%
  • the next step (c) if annealing is performed so that the tensile strength is 150 MPa or more, or the Vickers hardness is 50 or more, the average crystal of recrystallized particles as conventionally recognized The particle size becomes large and the desired effect cannot be obtained.
  • the production method of the present invention includes a step (c) of annealing a cold plastic-worked alloy at 170 to 250 ° C.
  • Step (c) is a step of recrystallizing the alloy to which a strain of a certain level or more is applied in step (b).
  • the annealing can be performed preferably at 190 to 240 ° C. for 10 minutes to 12 hours, particularly 30 minutes to 4 hours.
  • the annealing temperature is out of the range of 170 to 250 ° C., the corrosion resistance and cold workability are lowered, and the desired highly practical Mg—Li alloy cannot be obtained.
  • the production method of the present invention can include a step (a1) of subjecting the alloy ingot obtained in the step (a) to a homogeneous heat treatment before the step (b).
  • the heat treatment in step (a1) can usually be carried out at 200 to 300 ° C. for 1 to 24 hours.
  • the production method of the present invention can include a step (a2) of hot rolling the alloy ingot obtained in the step (a) or the step (a1) before the step (b).
  • the hot rolling in the step (a2) can usually be performed at 200 to 400 ° C.
  • the rolled material of the present invention is made of the Mg—Li alloy of the present invention, it is excellent in corrosion resistance and cold workability. Usually, the rolled material has a thickness of about 0.01 to 5 mm.
  • the rolled material of the present invention can be used for moldings such as portable audio equipment, digital cameras, mobile phones, laptop computers, and other automobile parts, and automobile parts by cold pressing. Since the rolled material of the present invention is excellent in cold workability, there is no cracking or poor appearance, high dimensional accuracy can be obtained, and production efficiency of the molded product or the like can be improved.
  • the molded article of the present invention is excellent in corrosion resistance because it is made of the Mg—Li alloy of the present invention.
  • the molded product of the present invention can be obtained by molding the Mg—Li alloy of the present invention by, for example, cutting, grinding, polishing, pressing or the like. Considering equipment and manufacturing costs, it is preferable to use the rolled material of the present invention and to perform cold pressing.
  • the molded article of the present invention can be appropriately subjected to a surface treatment, and a known method for a magnesium-based alloy can be applied as the surface treatment.
  • a degreasing process using an organic solvent such as hydrocarbon or alcohol a blasting process or an etching process using acid, alkali, etc. for the purpose of removing or roughening the surface oxide film.
  • a chemical conversion treatment step or an anodization treatment step can be performed.
  • a chemical conversion treatment process it can carry out by the well-known method standardized by JIS, such as chromate treatment and non-chromate treatment, for example.
  • the anodizing treatment step can be performed by appropriately determining electrolytic conditions such as an electrolytic solution, a film formation stabilizer, current density, voltage, temperature, time, and the like.
  • a coating treatment step can be appropriately performed.
  • the coating treatment step can be performed by a known method such as electrodeposition coating, spray coating, and dip coating. For example, a known organic paint or inorganic paint is used.
  • FPF Finger Print Free
  • glassy coating which is performed with a titanium alloy
  • the film has excellent adhesion and high density. Can be formed.
  • a heat treatment step may be appropriately performed before and after the surface treatment.
  • Example 1 Raw materials blended so as to have a composition of Li 14.0% by mass, Al 1.00% by mass, Ca 0.30% by mass, and the balance Mg were heated and melted to obtain an alloy melt. Subsequently, this melt was cast into a 55 mm ⁇ 300 mm ⁇ 500 mm mold to produce an alloy ingot. The composition of the obtained alloy was measured by ICP analysis. The results are shown in Table 1. This alloy ingot was heat-treated at 300 ° C. for 24 hours, surface-cut, and a 50 mm thick rolling slab was produced. This slab was rolled at 350 ° C. to a plate thickness of 2 mm.
  • the sheet was rolled to a plate thickness of 1 mm at a reduction rate of 50% to obtain a rolled product.
  • the obtained rolled product was annealed at 230 ° C. for 1 hour to prepare a rolled material.
  • the average grain size, tensile strength, and Vickers hardness of the obtained rolled material were measured according to the methods described above. Corrosion resistance was evaluated by two methods, a 5% salt spray test and a 5% salt water immersion test. Further, cold workability was evaluated by measuring a limit drawing ratio (LDR) at room temperature. The results are shown in Table 1.
  • the 5% salt spray test is a test in which spraying is performed for 8 hours in accordance with JIS Z 2371 neutral salt spray test method (sodium chloride concentration 5%, pH 6.5 to 7.2, temperature 35 ° C.) and left for 16 hours. This was done by cycling. The evaluation was performed by photographing the test pieces before and after the test and visually.
  • FIG. 1 shows a copy of a photograph of the test piece before the test
  • FIG. 2 shows a copy of the photograph of the test piece after the test.
  • the 5% salt water immersion test consists of 3 cycles of polishing the surface and then rinsing the acetone-washed specimen for 8 hours in salt water with a sodium chloride concentration of 5% at a liquid temperature of 25 ⁇ 5 ° C.
  • Comparative Example 1 A rolled material was produced in the same manner as in Example 1 except that the composition of the raw materials was Li 14.0% by mass, Al 1.00% by mass, and the balance Mg, and annealing performed at 230 ° C. for 1 hour was performed at 150 ° C. for 1 hour. And evaluated. A copy of the photograph taken of the test piece before the 5% salt spray test is shown in FIG. 3, and a copy of the photograph after the test is shown in FIG. The other evaluation results are shown in Table 2.
  • Examples 2 to 16 and Comparative Examples 2 to 11 A rolled material was produced in the same manner as in Example 1, except that the raw material composition was changed so that the alloy compositions shown in Table 1 and Table 2 were obtained, and the production conditions shown in Table 1 and Table 2 were changed. The obtained rolled material was evaluated in the same manner as in Example 1 except for the 5% salt spray test. Table 1 shows the results of the examples and Table 2 shows the results of the comparative examples.
  • Comparative Example 2 it can be seen that although the alloy composition, tensile strength, and Vickers hardness specified for the Mg—Li alloy of the present invention are satisfied, the average crystal grain size is too large to obtain desired performance. In the comparative example 3, it turns out that it is inferior to corrosion resistance only by not containing Al as an alloy composition. In Comparative Examples 4 and 5, when only the alloy composition with a large amount of Al or a small amount of Li is outside the range defined by the production method of the present invention, the tensile strength and Vickers hardness defined for the Mg-Li alloy of the present invention Even when the average grain size requirement is satisfied, the cold workability is remarkably inferior.
  • Comparative Example 6 it can be seen that when only the alloy composition having a large amount of Li is outside the range defined by the production method of the present invention, the corrosion resistance is poor.
  • Comparative Example 7 when only the annealing temperature is 130 ° C., which is lower than the range defined by the production method of the present invention, recrystallization does not occur, and the requirements of tensile strength and Vickers hardness defined for the Mg—Li alloy of the present invention Even if it satisfies, it turns out that it is inferior to both cold workability and corrosion resistance.
  • Comparative Example 8 when the cold reduction rate and the annealing temperature were outside the ranges specified by the production method of the present invention, recrystallization did not occur, and the tensile strength and Vickers hardness specified by the Mg-Li alloy of the present invention were not. It can be seen that even if the requirements are satisfied, both cold workability and corrosion resistance are inferior.
  • Comparative Example 9 when the cold rolling reduction is out of the range specified by the production method of the present invention, the average crystal even though the tensile strength and Vickers hardness requirements specified for the Mg—Li alloy of the present invention are satisfied. It turns out that a particle size becomes large too much and is inferior to corrosion resistance.
  • Comparative Example 10 the Mg—Li alloy of the present invention was recrystallized when the annealing temperature was 160 ° C. lower than the range specified by the production method of the present invention, even though the cold rolling reduction was increased. It can be seen that the requirements of tensile strength and Vickers hardness specified in the above are not satisfied and the corrosion resistance is poor.
  • Comparative Example 11 when the annealing temperature is 260 ° C., which is higher than the range specified by the production method of the present invention, even if the cold rolling reduction is increased, the tensile strength and Vickers specified by the Mg—Li alloy of the present invention are used. It can be seen that even if the hardness requirement is satisfied, the average crystal grain size becomes too large and the corrosion resistance is poor.

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Abstract

L'invention porte sur un alliage de magnésium-lithium très léger ayant des niveaux élevés à la fois de résistance à la corrosion et d'aptitude à l'écrouissage et une certaine résistance à la traction, sur un matériau laminé et sur un article moulé. L'alliage comprend de 10,5 % en masse à 16,0 % en masse de Li et de 0,50 % en masse à 1,50 % en masse d'Al, le reste étant composé de Mg. L'alliage a un diamètre de grain cristallin moyen de 5 µm à 40 µm, une résistance à la traction d'au moins 150 MPa et une dureté Vickers (HV) d'au moins 50.
PCT/JP2009/054714 2008-03-13 2009-03-12 Alliage de magnésium-lithium, matériau laminé et article moulé Ceased WO2009113601A1 (fr)

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
WO2011030474A1 (fr) * 2009-09-11 2011-03-17 株式会社三徳 Alliage lithium-magnésium, matériau laminé, article formé et procédé de fabrication associé
JP2011058075A (ja) * 2009-09-11 2011-03-24 Million Kagaku Kk マグネシウム−リチウム合金およびその表面処理方法
EP3072989A1 (fr) 2015-03-23 2016-09-28 Fuji Jukogyo Kabushiki Kaisha Alliage de magnésium-lithium, procédé de fabrication associé, pièce d'aéronef et procédé de fabrication de pièce d'aéronef
US10851442B2 (en) 2015-03-25 2020-12-01 Subaru Corporation Magnesium-lithium alloy, rolled stock made of magnesium-lithium alloy, and processed product including magnesium-lithium alloy as material

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CN114150195B (zh) * 2021-12-07 2022-07-19 北京工业大学 一种高性能稀土镁锂合金板材及其制备方法

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JPH0432535A (ja) * 1990-05-28 1992-02-04 Toyota Motor Corp 高強度、高剛性マグネシウムリチウム合金
JPH06279906A (ja) * 1993-03-26 1994-10-04 Mitsui Mining & Smelting Co Ltd 鋳造用軽量高強度マグネシウム合金
JPH11279675A (ja) * 1998-03-30 1999-10-12 Sharp Corp マグネシウム合金及びその製造方法
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JP2011058075A (ja) * 2009-09-11 2011-03-24 Million Kagaku Kk マグネシウム−リチウム合金およびその表面処理方法
US9708700B2 (en) 2009-09-11 2017-07-18 Santoku Corporation Magnesium-lithium alloy, rolled material, formed article, and process for producing same
EP3072989A1 (fr) 2015-03-23 2016-09-28 Fuji Jukogyo Kabushiki Kaisha Alliage de magnésium-lithium, procédé de fabrication associé, pièce d'aéronef et procédé de fabrication de pièce d'aéronef
JP2016180134A (ja) * 2015-03-23 2016-10-13 富士重工業株式会社 マグネシウム−リチウム合金、マグネシウム−リチウム合金の製造方法、航空機部品及び航空機部品の製造方法
US10752981B2 (en) 2015-03-23 2020-08-25 Subaru Corporation Magnesium-lithium alloy, method of manufacturing magnesium-lithium alloy, aircraft part, and method of manufacturing aircraft part
US10851442B2 (en) 2015-03-25 2020-12-01 Subaru Corporation Magnesium-lithium alloy, rolled stock made of magnesium-lithium alloy, and processed product including magnesium-lithium alloy as material

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