Dynamic recrystallization mechanism of as-cast nickel base superalloy N10276 during primary hot working

作     者：Xin-chao Wang Yan Wang Xiao-jie Lian Mei Xu Li-feng Hou Ying-hui Wei Xin-chao Wang;Yan Wang;Xiao-jie Lian;Mei Xu;Li-feng Hou;Ying-hui Wei

作者机构：College of Materials Science and EngineeringTaiyuan University of TechnologyTaiyuan 030024ShanxiChina State Key Laboratory of Advanced Stainless Steel MaterialsTaiyuan Iron and Steel(Group)Co.Ltd.Taiyuan 030003ShanxiChina Technology CenterShanxi Taiyuan Stainless Steel Co.Ltd.Taiyuan 030003ShanxiChina 

出 版 物：《Journal of Iron and Steel Research International》 (Journal of Iron and Steel Research, International)

年 卷 期：2023年第30卷第4期

页      面：825-837页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 0804[工学-仪器科学与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：the Central Government Guided Local Special Funds(YDZX20191400002094) the Key Scientific Research Project in Shanxi Province(20191102006) the Special Project for Research and Development of Key Core Technologies and Common Technologies in Shanxi Province(20201102017) the Shanxi Applied Basic Research Plan(201901d111460) 

主　　题：Dynamic recrystallization mechanism As-cast superalloy N10276 Primary hot working Twin 

摘      要：The dynamic recrystallization(DRX)mechanism of as-cast nickel base superalloy N10276 during primary hot working was investigated by compression tests at temperatures of 1000–1200℃ and strain rates between 0.01 and 10 s^(-1).Optical microscopy,scanning electron microscopy,electron backscattered diffraction technique and transmission electron microscopy were used to characterize the evolution of *** higher deformation temperature or lower strain rate,the true stress–true strain curves exhibit the characteristic of a peak stress followed by a steady state flow stress under large strains,confirming the occurrence of *** degree of DRX increases with elevating deformation *** the progress of DRX,low angle grain boundaries gradually decrease,while high angle grain boundaries increase *** studies have shown that discontinuous dynamic recrystallization is the main recrystallization *** there are few original grain boundaries and twin boundaries,and lack of second phase particles for particle stimulated nucleation,geometrically necessary boundaries are formed as supplementary nucleation sites through sub-grain boundary rotation and deformation twin *** annealing twins dominated by Σ3 grain boundaries are generated in large quantities during the growth of recrystallized grains.