热轧退火Mg-5Li-1Al合金板材组织与力学性能的发展

IF 0.6 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY 稀有金属材料与工程 Pub Date : 2018-12-01 DOI:10.1016/S1875-5372(19)30011-6
Li Ruihong , Chen Zhijun , Jiang Bin , Pan Fusheng
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引用次数: 1

摘要

将热轧后的Mg-5Li-1Al镁合金板材在150℃和300℃下退火30 min,研究了轧制和退火后的Mg-5Li-1Al镁合金板材的组织、力学性能和织构。讨论了塑性变形机理。结果表明:退火后的薄片具有较弱的基体织构和均匀的再结晶组织,晶粒尺寸为~ 15 μm;提高退火温度,拉伸伸长率提高,拉伸强度、屈服强度和屈服比降低,总体上有利于板材成形性的改善。在300℃退火后,由于Li的加入和较高的退火温度,轧制后的LA51板的力学性能得到了改善。
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Microstructure and Mechanical Property Development in a Hot-rolled and Annealed Mg-5Li-1Al Alloy Sheet

Mg-5Li-1Al magnesium alloy sheets processed by hot rolling were annealed at 150 and 300 °C for 30 min. The microstructure, mechanical properties, and texture of the 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, yield strength and yield ratio, which generally favor the improvement of sheet formability. The rolled LA51 sheet after annealing at 300 °C exhibits improved mechanical properties due to Li addition and high annealing temperature.

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来源期刊
稀有金属材料与工程
稀有金属材料与工程 工程技术-材料科学:综合
CiteScore
1.30
自引率
57.10%
发文量
17973
审稿时长
4.2 months
期刊介绍:
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