TWIP钢的价电子理论  

Valence Electron Theory of TWIP Steel

作　　者：阳义[1] 李春福[1] 李锡平[1] 胡志强[1] 

机构地区：[1]西南石油大学油气藏地质及开发国家重点实验室,四川成都610500

出　　处：《物理测试》2013年第6期54-59,共6页Physics Examination and Testing

摘　　要：以试用于可膨胀管技术的TWIP钢30Mn25Cr10Ni2MoNbRe为例,用固体与分子经验电子理论建立了FeMn,Fe-C-Mn等各种晶胞类型的价电子结构模型。结果表明,合金元素Me的置换取代了Fe后,固溶引起键络价电子结构分布发生很大的变化,γ-Fe中键络的增强使键的分解和重构困难,起了强化作用。合金原子的含量影响了原子层与层之间主要键的键能强弱,使得TWIP钢滑移面相邻两层原子不易发生相对滑移,有利于孪生诱导塑性机制。Abstract： Empirical electron theory of solids and molecules was used to build up valence electron structure models of unit cell on Fe-Mn, Fe-C-Mn etc. by discussing TWIP steel-30Mn25Cr10Ni2MoNbRe which suits for expandable tubular applications. The results show that in the course of replacing Fe by alloy element Me, solid solution causes a great redistribution of valence electron structure of bond network, which strengths bond network in 7-Fe and thus resists decomposition and reconstruction. The content of Me has an influence on strength of bonds between layers, which avoids slipping in slip surfaces of TWlP steel and it is good for twinning induced plasticity mechanism.

关 键 词：TWIP钢 经验电子理论 孪生诱导塑性 

分 类 号：TG111[金属学及工艺—物理冶金]