Simultaneous Improvement of Strength, Ductility and Damping Capacity of Single β-Phase Mg–Li–Al–Zn Alloys

Simultaneous Improvement of Strength, Ductility and Damping Capacity of Single β-Phase Mg–Li–Al–Zn Alloys

Body-centered cubic (BCC) Mg–Li alloy can be effectively strengthened by with the addition of Al and Zn. However, adding excessive amounts result in reduced mechanical properties and damping capacity of the alloy during subsequent heat treatment and deformation. The effects of solution-hot rolling-a...

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Bibliographic Details
Published in:Metals (Basel ) Vol. 13; no. 1; p. 159
Main Authors: Yang, Xinhe, Jin, Yang, Wu, Ruizhi, Wang, Jiahao, Wang, Dan, Ma, Xiaochun, Hou, Legan, Serebryany, Vladimir, Tashlykova-Bushkevich, Iya I., Betsofen, Sergey Ya
Format: Journal Article
Language:English
Published: Basel MDPI AG 01-01-2023
Subjects:
Aging
Aging (metallurgy)
aging softening
Alloying elements
Alloys
Aluminum base alloys
Atomic properties
BCC-structured Mg–Li alloy
Casting alloys
Chemical precipitation
Damping capacity
Decomposition
Deformation
Deformation effects
dislocation strengthening
Ductility
Grain boundaries
Grain size
Heat
Heat treatment
Hot rolling
Magnesium base alloys
Mechanical properties
movable dislocation density
Softening
Solid solutions
Solution strengthening
Tensile strength
Zinc
United States > US
Japan
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Summary:Body-centered cubic (BCC) Mg–Li alloy can be effectively strengthened by with the addition of Al and Zn. However, adding excessive amounts result in reduced mechanical properties and damping capacity of the alloy during subsequent heat treatment and deformation. The effects of solution-hot rolling-aging on the mechanical properties and damping capacity of LAZ1333 alloy and LAZ1366 alloy were studied. The solid solution strengthening greatly increases the hardness of the alloy, but the ductility is extremely poor. The AlLi softening phase precipitated during the subsequent hot rolling and aging process greatly improves the ductility of the alloy, but the excess precipitation of in the AlLi softening phase and the solid solution of excess Zn element are not conducive to the substantial improvement of the strength and ductility of the alloy. Excessive addition of alloying elements is detrimental to the damping capacity of the alloy, but the damping capacity of the alloy can be significantly improved by depleting the number of solute atoms through subsequent ageing treatments. The UTS and FE of as-cast LAZ 1333 alloy are 111 MPa and 16.9%, respectively. The as-aged LAZ1333 alloy has the best mechanical properties and damping capacity, and the UTS and FE are increased by 65.8% and 89.3%, respectively, compared to the as-cast alloy, and the damping capacity increased from 0.011 to 0.015.
ISSN:2075-4701
2075-4701
DOI:10.3390/met13010159