文献类型：期刊文献

英文题名：Microstructural Evolution, Mechanical Properties and Thermal Stability of Gradient Structured Pure Nickel

作者：Li, Xiao[1];Guan, Bo[2];Jia, Yun-Fei[1];Xin, Yun-Chang[2];Zhang, Cheng-Cheng[3];Zhang, Xian-Cheng[1];Tu, Shan-Tung[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[2]Chongqing Univ, Sch Mat Sci & Engn, Chongqing 400044, Peoples R China;[3]AECC Commercial Aircraft Engine Co LTD, Shanghai Engn Res Ctr Commercial Aircraft Engine, Shanghai 201108, Peoples R China

年份：2019

卷号：32

期号：8

起止页码：951

外文期刊名：ACTA METALLURGICA SINICA-ENGLISH LETTERS

收录：;EI(收录号：20192707144164);WOS:【SCI-EXPANDED(收录号:WOS:000473228900004)】；

基金：The authors would like to acknowledge gratefully for the financial support through the National Natural Science Foundation of China (Nos. 51725503, 51605164 and 51575183) and 111 Project. X.C. Zhang is also grateful for the support by Shanghai Technology Innovation Program of SHEITC (CXY-2015-001), Fok Ying Tung Education Foundation and Young Program of Yangtze River Scholars. Y.F. Jia is also grateful for the support by Shanghai Sailing Program (16YF1402300) and Shanghai Chenguang Program (16CG34).

语种：英文

外文关键词：Deep rolling; Pure nickel; Microstructural evolution; Mechanical properties; Thermal stability

摘要：The microstructural evolution of pure nickel treated by deep rolling (DR) technique with different indent depths was investigated by means of optical microscopy and transmission electron microscopy. The surface roughness, hardness and residual stress distribution along the depth from surface were measured. Moreover, the DR-treated sample was annealed at temperatures from 300 to 700 degrees C for 2h. The results reveal that dislocation movements are the fundamental mechanisms of gradient grain refinement during the DR process. With increasing indent depth of the DR, the gradient microhardness on the cross section of sample significantly increases, the maximum compressive residual stress decreases, and the affecting region of residual stress increases. The results of thermal stability depict that the microstructure can be stable as temperature up to 300 degrees C, and the abnormal grain growth and annealing twins are observed at 600 degrees C.