摘要
对AZ31B镁合金板材在不同温度下进行了不同道次的等温循环弯曲试验,分析了镁合金板材微观组织和宏观织构的变化情况。结果表明,在变形温度为443K和483K时,主要由孪晶来协调变形,并且在孪晶带附近产生了最初的再结晶晶粒;在变形温度为523K时,最初再结晶晶粒产生在晶界处。在变形温度为483K循环弯曲3个道次的条件下,其室温伸长率达到17.1%,而原始AZ31B镁合金板材的室温伸长率为12.4%。其基面织构最大相对强度由9.80降到了5.75。
Magnesium alloy AZ31 sheet was processed by isothermal repeated bending technology （IRBT） at different temperatures. Microstructure and texture as well as properties of magnesium alloy sheet were analyzed. The results indicate that the twinning crystal is the dominant deformation mechanism at 443 K and 483 K, and initial recrystallization grain appears near the twinning boundaries. With deformation temperature of 523 K, initial recrystallization is observed at grain boundaries. For initial magnesium alloy sheet, the elongation is 12.4% and the texture intensity reaches 9.8 at room temperature. When magnesium alloy AZ31 sheet was bended 3 passes at 483 K, the elongation reaches 17. 1% and the texture intensity is 5.75 at room temperature.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2013年第1期12-14,共3页
Special Casting & Nonferrous Alloys
关键词
镁合金
循环弯曲
织构
性能
Magnesium Alloy
Repeated Bending
Texture
Properties
