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Microstructural Evolution, Mechanical Properties and Thermal Stability of Gradient Structured Pure Nickel

论文摘要

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 ℃ for 2 h.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 ℃, and the abnormal grain growth and annealing twins are observed at 600 ℃.

论文目录

  • 1 Introduction
  • 2 Experimental
  • 3 Results and Discussion
  •   3.1 Microstructural Observation
  •   3.2 Mechanical Properties
  •     3.2.1 Surface Roughness
  •     3.2.2 Hardness
  •     3.2.3 Residual Stress
  •   3.3 Thermal Stability
  • 4 Conclusions

    • 文章来源

    类型: 期刊论文

    作者: Xiao Li,Bo Guan,Yun-Fei Jia,Yun-Chang Xin,Cheng-Cheng Zhang,Xian-Cheng Zhang,Shan-Tung Tu

    来源: Acta Metallurgica Sinica(English Letters) 2019年08期

    年度: 2019

    分类: 工程科技Ⅰ辑

    专业: 金属学及金属工艺

    单位: Key Laboratory of Pressure Systems and Safety, Ministry of Education, School of Mechanical and Power Engineering, East China University of Science and Technology,School of Materials Science and Engineering, Chongqing University,AECC Commercial Aircraft Engine Co.LTD, Shanghai Engineering Research Center for Commercial Aircraft Engine

    基金: the financial support through the National Natural Science Foundation of China (Nos.51725503,51605164 and 51575183),111 Project,support by Shanghai Technology Innovation Program of SHEITC (CXY-2015-001),Fok Ying Tung Education Foundation,Young Program of Yangtze River Scholars,support by Shanghai Sailing Program (16YF1402300),Shanghai Chenguang Program (16CG34)

    分类号: TG146.15

    页码: 951-960

    总页数: 10

    文件大小: 5431K

    下载量: 13

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