摘要
利用光学金相显微镜(OM)、电子背散射衍射(EBSD)技术,并结合室温力学行为测试,研究挤压、退火及室温拉伸过程中纯Zn的显微组织,讨论孪生行为对纯Zn室温拉伸性能的影响。结果表明:在纯Zn挤压及室温拉伸、压缩过程中,{1012}压缩孪生为主要的孪生类型;在纯室温单向变形过程中,{1012}压缩孪生导致了纯Zn明显的拉压不对称性。另外,{1012}压缩孪生变形在晶间发生传递,利用m¢因子值可以评价孪生在晶间传递的可能性,取向接近、 m'值越大的晶粒间越容易发生孪生传递。
The microstructure evolution and mechanical properties were investigated by combined optical microscopy(OM),electron backscattered diffractometry(EBSD)and mechanical property testing at room temperature.The results suggest that{2 1 10}twinning activates in most samples during deformation in Zn and causes tension-compression yield asymmetry during uniaxial loading at room temperature.And the paired twins are observed,where twins can propagate throughout the grains and consequently transfer strain to neighboring grains(termed as twin-twin transfer behavior).A geometric compatibility factor m'was discussed to assess the possibility.It indicates that the more similar of grain orientation and the larger of m'value are,the more likely twin-twin transfer tends to happen.
作者
赵梦杰
靳丽
董杰
王锋华
董帅
ZHAO Meng-jie;JIN Li;DONG Jie;WANG Feng-hua;DONG Shuai(National Engineering Research Center of Light Alloy Net Forming,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2018年第9期1808-1815,共8页
The Chinese Journal of Nonferrous Metals
关键词
ZN
孪生
拉压不对称
变形协调因子
zinc
twinning
tension-compression yield asymmetry
deformation compatibility factor