摘要
对AZ31镁合金轧制板材在不同温度和时间进行了退火,研究了在退火过程中组织和性能的变化规律.实验结果表明,300℃轧制后的AZ31镁合金薄板材的组织中存在大量的孪晶.退火后,孪晶逐渐消失,形成等轴的再结晶晶粒.晶粒尺寸随退火温度的升高而变大,随退火时间的延长先细化后长大.同时,退火后板材的抗拉强度略有下降,但伸长率有明显提高,在200℃退火120 min后,伸长率可达到28%.
The microstructure and mechanical properties of rolled AZ31 magnesium alloy were investigated upon annealing under different condition. The result show that twinning take place in all the grains in AZ31 magnesium alloy rolled at 300℃. The twinning disappeared gradually and recrystallized grains formed after annealing. Grain size grows large as the annealing temperature is elevated and reduces at first then grows as the annealing time is prolonged. The tensile strengths of annealed alloy descends slightly, however tensile elongation increases. The highest elongation is 28% after annealed at 200℃ for 120 min.
出处
《湘潭大学自然科学学报》
CAS
CSCD
北大核心
2005年第4期57-61,共5页
Natural Science Journal of Xiangtan University
基金
湖南省科委重点资助项目(04GK10081)
关键词
镁合金
退火
再结晶
孪晶
magnesium alloy
annealing
reerystallizattion
twinning
