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High-strength and toughness magnesium-lithium alloy layered composite material and preparation method thereof

A layered composite material, magnesium-lithium alloy technology, applied in the direction of metal layered products, chemical instruments and methods, layered products, etc., can solve problems such as difficult to achieve interface bonding, to improve interface bonding strength and comprehensive mechanical properties, The effect of high-strength plastic toughness and good plastic toughness

Active Publication Date: 2016-11-02
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, when alloys with different crystal structure types are combined, it is difficult to achieve better interfacial bonding due to the existence of certain semi-coherent or incoherent interfaces between the crystal lattices.

Method used

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  • High-strength and toughness magnesium-lithium alloy layered composite material and preparation method thereof
  • High-strength and toughness magnesium-lithium alloy layered composite material and preparation method thereof
  • High-strength and toughness magnesium-lithium alloy layered composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0039] For the α-Mg single-phase Mg-Li alloy, its composition and mass percentage are Li: 5.0%, Al: 1.0%, and the total amount of unavoidable impurities such as Fe, Cu, Ni, Mn, Si is less than 0.03%, The balance is Mg. For the β-Li single-phase Mg-Li alloy, its composition and mass percentage are: Li: 12.0%, Al: 1.0%, and the total amount of unavoidable impurities such as Fe, Cu, Ni, Mn, Si, etc. is less than 0.03% , the balance being Mg. The initial thickness of the plates is 2mm.

[0040] The cumulative rolling and annealing process of α / β magnesium-lithium alloy composite plate:

[0041] (a) Cut the two magnesium-lithium alloy plates into two pieces of equal size. Firstly, the surface is cleaned, that is, it is cleaned with dilute hydrochloric acid to remove large oil stains on the surface of the alloy; then polished with fine sandpaper to remove oxides on the surface of the alloy; then cleaned with acetone to further remove oil stains on the surface of the alloy; finall...

Embodiment 2

[0048] For the α-Mg single-phase Mg-Li alloy, its composition and mass percentage are Li: 4.5%, Al: 0.5%, and the unavoidable total amount of impurities such as Fe, Cu, Ni, Mn, Si is less than 0.03%, The balance is Mg. For the β-Li single-phase Mg-Li alloy, its composition and mass percentage are: Li: 11.5%, Al: 0.5%, and the total amount of unavoidable impurities such as Fe, Cu, Ni, Mn, Si, etc. is less than 0.03% , the balance being Mg. The initial thickness of the plates is 2mm.

[0049] The cumulative rolling and annealing process of α / β magnesium-lithium alloy composite plate:

[0050] (a) Cut the two magnesium-lithium alloy plates into two pieces of equal size. Firstly, clean the surface, that is, wash with dilute hydrochloric acid to remove large oil stains on the surface of the alloy; then polish with fine sandpaper to remove oxides on the surface of the alloy; then clean with acetone to further remove oil stains on the surface of the alloy; finally rinse with absol...

Embodiment 3

[0056] For the α-Mg single-phase Mg-Li alloy, its composition and mass percentage are Li: 5.5%, Al: 2.0%, and the unavoidable total amount of impurities such as Fe, Cu, Ni, Mn, Si is less than 0.03%, The balance is Mg. For the β-Li single-phase Mg-Li alloy, its composition and mass percentage are: Li: 15.0%, Al: 1.5%, and the total amount of unavoidable impurities such as Fe, Cu, Ni, Mn, Si, etc. is less than 0.03% , the balance being Mg. The initial thickness of the plates is 2mm.

[0057] The cumulative rolling and annealing process of α / β magnesium-lithium alloy composite plate:

[0058] (a) Cut the two magnesium-lithium alloy plates into two pieces of equal size. Firstly, clean the surface, that is, wash with dilute hydrochloric acid to remove large oil stains on the surface of the alloy; then polish with fine sandpaper to remove oxides on the surface of the alloy; then clean with acetone to further remove oil stains on the surface of the alloy; finally rinse with absol...

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Abstract

The invention provides a high-strength and toughness magnesium-lithium alloy layered composite material and a preparation method thereof. The preparation method comprises the following steps: 1, cutting an alpha-Mg single phase Mg-Li alloy plate and a beta-Li single phase Mg-Li alloy plate to from two places with same dimensions; 2, fixing the Mg-Li alloy plates obtained in step 1; 3, carrying out composite rolling on the well fixed Mg-Li alloy plates; 5, cutting an Mg-Li alloy plate obtained in step 3 to form two pieces with same dimensions, superposing and fixing the two pieces, and carrying out composite rolling; 5, repeating step 4 5-8 passes to obtain an accumulative roll-bonded composite plate; and 6, annealing the accumulative roll-bonded composite plate obtained in step 5 in a heat treatment furnace. Accumulative roll-bonding is carried out to realize formation of a rub rolling area in order to realize the good interface combination effect of the composite plate. The annealing treatment further improves the interface combination strength, the elongation percentage and other mechanical performances of the composite plate.

Description

technical field [0001] The invention relates to a magnesium-lithium alloy layered composite material. The invention also relates to a preparation method of a magnesium-lithium alloy layered composite material. Background technique [0002] Magnesium-lithium alloy is the lightest metal structure material so far, and its density is generally 1.35-1.65g / cm 3 , 1 / 4~1 / 3 lighter than ordinary magnesium alloys, 1 / 3~1 / 2 lighter than aluminum alloys, with high specific strength, specific stiffness, excellent shock resistance and high energy particle penetration resistance. One of the most ideal metal structural materials in the fields of aerospace, nuclear industry and so on. [0003] In the magnesium-lithium binary alloy, the phase composition and crystal structure of the alloy will also change according to the Li content: when the Li content is less than 5.7%, the alloy is α-Mg (a solid solution of Li in Mg) single The phase structure has a close-packed hexagonal crystal structu...

Claims

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Application Information

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IPC IPC(8): B32B15/01C22C23/00
CPCB32B15/01B32B2250/02B32B2307/558C22C23/00
Inventor 巫瑞智王天资侯乐干张密林
Owner HARBIN ENG UNIV
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