Hot workability and dynamic recrystallization mechanisms of pure nickel N6

作     者：Zhi JIA Bao-lin WEI Xuan SUN Jin-jin JI Yan-jiang WANG Li-dan YU 贾智;魏保林;孙璇;姬金金;汪彦江;俞丽丹

作者机构：School of Materials Science and EngineeringLanzhou University of TechnologyLanzhou 730050China State Key Laboratory of Advanced Processing and Recycling of Nonferrous MetalsLanzhou University of TechnologyLanzhou 730050China School of Materials EngineeringLanzhou Institute of TechnologyLanzhou 730050China 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2022年第32卷第10期

页      面：3259-3275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 Science Foundation for Distinguished Young Scholars of Gansu Province,China(No.18JR3RA134) Lanzhou University of Technology Support Plan for Excellent Young Scholars,China(No.CGZH001) the National Nature Science Foundation of China(No.51665032) 

主　　题：pure nickel N6 microstructure evolution hot workability processing map dynamic recrystallization 

摘      要：The hot workability and dynamic recrystallization(DRX)mechanisms of pure nickel N6 were systematically investigated using hot compression *** on hot compression data,the constitutive equation of N6 was developed and its reliability was *** hot processing map was constructed,and combined with microstructural observations,a semi-quantitative response relationship between hot deformation parameters and microstructure was *** DRX process of N6 is a thermally activated process and particularly sensitive to the strain *** optimal hot processing parameters for N6 were determined to be 950−1050℃ and 0.1−1 s^(−1).Furthermore,it was proven that the dominant nucleation mechanism is discontinuous DRX characterized by grain boundary bulging and twins assisting nucleation,while the continuous DRX characterized by subgrains combined with rotation is an inactive nucleation mechanism.