Nucleation mechanism of a nickel-base superalloy during dynamic recrystallization

作     者：Shuai WANG Lei WANG Yang LIU GuohuaXU Beijiang ZHANG Guangpu ZHAO 

作者机构：Key Laboratory for Anisotropy and Texture of Materials Northeastern University Shenyang 110819China High Temperature Materials Research Institute Central Iron and Steel Research Institute Beijing100081 China 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2011年第24卷第4期

页      面：295-300页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 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）] 0702[理学-物理学] 

基　　金：supported by the National Basic Research Program of China (No.2010CB631203) the National Natural Science Foundation of China (No.50841025) 

主　　题：Dynamic recrystallization Electron backscattering diffraction(EBSD) Transmission electron microscopy (TEM) Superalloy 

摘      要：Hot compression test was carried out at 1000 ~C to investigate the dynamic recrys- tallization nucleation mechanism of a nickel-base superalloy. It was found that the bulging of original grain boundaries was inhibited by carbides and deformation twins at the boundaries. Recrystallized nuclei evolved from the subgrains of dislocation re- configuration along original grain boundaries, and the growth of the potential nuclei was carried out by the coalescence of subgrains. The necklace structure of recrys- tallized grains along original grain boundaries was attributed to the strain gradient from grain boundary to grain interior.