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.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
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
关键词
TIAL
价电子结构
反常屈服行为
位错钉扎机制
TiAl,valence electron structures,anomalous yield behavior,dislocation pinning mechanism
