Microstructure and mechanical properties of Mg-5Li-1Al sheets prepared by accumulative roll bonding
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2018年第2期
论文作者：Legan Hou Ruizhi Wu Jinghuai Zhang Milin Zhang Anping Dong Baode Sun Sergey Betsofen Boris Krit
文章页码：317 - 323
摘 要：Ultrafine-grain and high-strength Mg-5Li-1Al sheets were prepared by accumulative roll bonding（ARB）process. Evolution of microstructure and mechanical properties of ARB-processed Mg-5Li-1Al sheets was investigated.Results show that, during ARB process, the evolution of deformation mechanism of t Mg-5Li-1Al alloy is as follows: twinning deformation, shear deformation, forming macro shear zone, and finally dynamic recrystallization（DRX）. The grain refining mechanism changes from twin DRX to rotation DRX. With the increase in ARB cycles, strength of the Mg-5Li-1Al sheets is enhanced, whilst elongation varies slightly.With the increase in rolling cycles, anisotropy of mechanical properties decreases. It is conclusive that strain hardening and grain refinement dominate the strengthening mechanism of Mg-5Li-1Al alloy.
Legan Hou1，Ruizhi Wu1，Jinghuai Zhang1，Milin Zhang1，Anping Dong3，Baode Sun3，Sergey Betsofen4，Boris Krit4
1. Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, Harbin Engineering University3. Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming, Shanghai Jiao Tong University4. Moscow Aviation Institute, National Research University
摘 要：Ultrafine-grain and high-strength Mg-5Li-1Al sheets were prepared by accumulative roll bonding（ARB）process. Evolution of microstructure and mechanical properties of ARB-processed Mg-5Li-1Al sheets was investigated.Results show that, during ARB process, the evolution of deformation mechanism of t Mg-5Li-1Al alloy is as follows: twinning deformation, shear deformation, forming macro shear zone, and finally dynamic recrystallization（DRX）. The grain refining mechanism changes from twin DRX to rotation DRX. With the increase in ARB cycles, strength of the Mg-5Li-1Al sheets is enhanced, whilst elongation varies slightly.With the increase in rolling cycles, anisotropy of mechanical properties decreases. It is conclusive that strain hardening and grain refinement dominate the strengthening mechanism of Mg-5Li-1Al alloy.
关键词：
