TiAl反常屈服行为的位错钉扎机制  

Dislocation Pinning Mechanisms of the Anomalous Yield Behavior (AYB) in TiAl

作　　者：李文[1] 朴英锡[1] 

机构地区：[1]长春大学机械学院,长春130022

出　　处：《钢铁研究学报》1999年第6期30-34,共5页Journal of Iron and Steel Research

基　　金：吉林省科技计划资助

摘　　要：利用电子理论计算了ＴｉＡｌ的价电子结构和键能，并由此近似计算了ＴｉＡｌ的平面缺陷能。在此基础上，由能量计算结果结合激活能分析了ＴｉＡｌ反常屈服行为的位错钉扎机制。结果表明：ＴｉＡｌ的反常屈服行为是３ 种主位错钉扎机制交互作用引起的。同时，孪生交割钉扎位错机制也有很大作用。The valence electron structures, energies and planar defects energies were calculated by EET. The dislocation locking mechanisms of AYB in TiAl were also analysed. The calculated results show that: ① the acting energies of AYB equation in TiAl are related to planar defects energies; ② the AYB in TiAl is resulted from mutual actions of three main dislocations penning mechanisms and twin intersection penning mechanism.

关 键 词：TIAL 价电子结构 反常屈服行为 位错钉扎机制 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TG111.2[金属学及工艺—金属材料]