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Effect of Combined Torsion and Tension on the Microstructure and Fracture Behavior of 316L Austenitic Stainless Steel

  • Jidong Zhang
  • Zhenyi Huang
  • Wenliang Rui
  • Jiaxing Li
  • Yuyu Tian
  • Jinghui LiEmail author
Article
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Abstract

In this study, the microstructure evolution and fracture behavior of 316L austenitic stainless steel (ASS) deformed by torsion–tension at room temperature was systematically investigated. During combined tension and torsion, the grain size was refined with increasing shear strain. In addition, the microtexture exhibited a preferred orientation with increasing shear stress. The metastable austenite underwent phase transition when the shear stress increased. The shear stress affected the fracture morphology, and dimples with different sizes and depths were observed for different pre-torsions. The dislocation density increased significantly owing to severe shear deformation. In addition, the dislocation structure evolved and subgrains appeared with the accumulation of shear strain during this combined deformation. The result showed that pre-torsion deformation plays an important role in improving the comprehensive performance and controlling the microstructure evolution of the sample subjected to tension deformation.

Keywords

316L austenitic stainless steel fracture morphology microstructure evolution severe plastic deformation 

Notes

Acknowledgment

The authors are grateful for the support received from the National Natural Science Foundation of China (Grant No. 51674004) and the National Natural Science Foundation of China (Grant No. 51805002).

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Copyright information

© ASM International 2019

Authors and Affiliations

  • Jidong Zhang
    • 1
  • Zhenyi Huang
    • 1
  • Wenliang Rui
    • 1
  • Jiaxing Li
    • 1
  • Yuyu Tian
    • 1
  • Jinghui Li
    • 1
    Email author
  1. 1.School of Metallurgical EngineeringAnhui University of TechnologyMa’anshanChina

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