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李瑞红,陈志军,蒋斌,潘复生.热轧及退火Mg-5Li-1Al板材的组织及力学性能演变[J].稀有金属材料与工程(英文),2018,47(12):3640~3644.[Li Ruihong,Chen Zhijun,Jiang Bin and Pan Fusheng.Microstructure and mechanical property development in a hot-rolled and annealed Mg-5Li-1Al alloy sheet[J].Rare Metal Materials and Engineering,2018,47(12):3640~3644.]
Microstructure and mechanical property development in a hot-rolled and annealed Mg-5Li-1Al alloy sheet
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Received:May 24, 2017  Revised:August 10, 2017
DOI:
Key words: microstructure  mechanical property  Mg-Li alloy  hot-rolling  anneal
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Li Ruihong,Chen Zhijun,Jiang Bin and Pan Fusheng  
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Abstract:
      Mg-5Li-1Al magnesium alloy sheets processed by hot rolling were annealed at 150℃ and 300℃ for 30 min, respectively. The microstructure, mechanical properties, and texture of rolled and annealed Mg-5Li-1Al alloy sheet were investigated. The plastic deformation mechanism was also discussed. The results show that the annealed sheet possesses weak basal texture and homogenous recrystallized structure with grain size of ~ 15 μm. Increasing annealing temperature results in an increase in tensile elongation and a decrease in tensile strength and yield ratio, which are generally favored for the improvement of sheet formability. The rolled LA51 sheet after annealing at 300℃ exhibits improved mechanical properties due to Li addition and high annealing temperature.