镁合金塑性变形中孪生的研究

材料导报, 2006, 20(8): 107-113.

镁合金塑性变形中孪生的研究

陈振华 ^1, , 杨春花 ^2, , 黄长清 ^3, , 夏伟军 ^4, , 严红革 ^5,

1.湖南大学材料科学与工程学院,长沙,410082

2.湖南大学材料科学与工程学院,长沙,410082

3.湖南大学材料科学与工程学院,长沙,410082

4.湖南大学材料科学与工程学院,长沙,410082

5.湖南大学材料科学与工程学院,长沙,410082

基金项目: 湖南省科研项目(03JKY1016) 湖南省科技专项基金(04GK1008-1)

关键词：镁合金 , 孪生 , 塑性变形 , 滑移

Investigation of the Twinning in Plastic Deformation of Magnesium Alloy

介绍了镁合金变形过程中孪生的晶体学、位错机理以及几何位向学;探讨了孪晶的形核、长大与演变机制;分析了孪生过程对塑性变形的作用;论述了影响孪生的几种基本因素,包括晶粒取向、变形温度、变形速度、晶粒尺寸、预变形.研究结果表明,镁合金塑性变形过程中孪生变形的作用在于,通过孪生过程改变晶粒取向或通过孪晶间或孪晶与滑移之间的相互作用,诱发新的滑移和孪生;孪晶也可抑制裂纹的产生和扩展,从而提高变形镁合金的室温塑性.

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镁合金塑性变形中孪生的研究

Investigation of the Twinning in Plastic Deformation of Magnesium Alloy

参考文献