Evolution of misfit dislocation network and tensile properties in Ni-based superalloys:a molecular dynamics simulation

作     者：WU WenPing GUO YaFang WANG YueSheng 

作者机构：Department of Engineering MechanicsWuhan UniversityWuhan 430072China Department of Mechanical EngineeringUniversity of WuppertalWuppertal 42097Germany Institute of Engineering MechanicsBeijing Jiaotong UniversityBeijing 100044China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学:物理学、力学、天文学(英文版))

年 卷 期：2012年第55卷第3期

页      面：419-427页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 11072026 and 11102139) the Fundamental Research Funds for the Central Universities (Grant No. 2009JBZ015) China Postdoctoral Science Foundation (Grant No. 20110491205) 

主　　题：Ni-based superalloys tensile properties dislocation network rafting molecular dynamics simulation 

摘      要：The structural evolution of dislocation network is closely related to y rafting and tensile properties. In this work, the effects of strain rate and temperature on the structural evolution of interface dislocation network in Ni-based superalloys are studied by molecular dynamics simulations. The correlation between the evolution of dislocation network and tensile properties is also explored. The results indicate that the dislocation network shows different degrees of deformation and damage at various strain rates and temperatures. The ), rafting depends on the damage structure of dislocation network at various strain rates and tem- peratures. Moreover, the tensile properties of interface in Ni-based superalloys are closely related to the evolution of disloca- tion network and dislocation motion mechanisms.