Microstructure and mechanical properties of Mg-5Li-1Al sheets prepared by accumulative roll bonding

• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2018,（2）
• 页码范围: 317-323
• 页数: 7页
• 语种: 英文

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-1Ai alloy.