ZK60镁合金热压变形和退火中的组织与织构演变

材料热处理学报, 2010, 31(6): 95-101.

ZK60镁合金热压变形和退火中的组织与织构演变

王敏 ^1, , 王守仁 ^2, , 王砚军 ^3, , 杨丽颖 ^4, , 赵方 ^5,

1.山东大学材料科学与工程学院,山东,济南,250022

2.济南大学机械工程学院,山东,济南,250022

3.济南大学机械工程学院,山东,济南,250022

4.济南大学机械工程学院,山东,济南,250022

5.济南大学机械工程学院,山东,济南,250022

基金项目: 山东省自然科学基金(Y2008F27;ZR2009FL003)

关键词： ZK60镁合金 , 铸轧条带 , 热压变形 , 静态再结晶 , 微观结构演变 , 退火

Evolution of microstructure and texture of ZK60 magnesium alloy during hot compression and annealing

利用光学显微镜(OM)和扫描电镜悬挂的EBSD背散射衍射实验观察并研究了ZK60镁合金铸轧条带在热压(350℃/0.1s-1)及退火处理(退火温度分别为250,300,350和400℃,退火时间分别为100,1000,5000,10000和50000 s)条件下的微观结构组织与织构演变.利用动态再结晶理论分析了ZK60镁合金铸轧条带、条带经小应变变形和大应变变形条件下的微观结构演变机理,利用静态再结晶理论分析了试样在不同热处理条件下的组织变化.结果表明,铸扎条带在热压变形后基面织构由弱变强,滑移和孪生导致动态再结晶发生,随应变增加,出现剪切带,晶粒明显细化.退火后基面织构逐渐弱化,基面沿轧制方向发生倾转,材料发生了明显静态再结晶.

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