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Improvement of Al/Steel Tungsten Inert Gas Welding–Brazing Joint by High-Energy Shot Peening

  • Kanglong Wu
  • Xinjian YuanEmail author
  • Zhan Hu
  • Haodong Wang
  • Ting Li
  • Zhe Yu
  • Jun Luo
Article
  • 89 Downloads

Abstract

High-energy shot peening treatment was applied to improve the Al/steel tungsten inert gas welding–brazing lap joint. The mechanical properties and microstructure evolution of the joint were investigated. Results showed that the mechanical properties of weld were evidently reinforced due to microstructure transformation of joint surface layer. The grain structure in the joint surface layer was distorted and refined. Large compressive residual stress was introduced into the joint surface, and its hardness obviously increased due to strain hardening. When the peening pressure was 0.15 MPa, the tensile shear strength of the joint reached the maximum value (199.6 MPa), which was 16.5% higher than that of the as-welded joint.

Keywords

aluminum joining mechanical property microstructure shot peening steel welding 

Notes

Acknowledgment

This research was supported by the Chongqing Science & Technology Commission in China (Project No.: cstc2018jcyjAX0574).

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Copyright information

© ASM International 2019

Authors and Affiliations

  • Kanglong Wu
    • 1
  • Xinjian Yuan
    • 1
    Email author
  • Zhan Hu
    • 1
  • Haodong Wang
    • 1
  • Ting Li
    • 1
  • Zhe Yu
    • 1
  • Jun Luo
    • 2
  1. 1.College of Materials Science and EngineeringChongqing UniversityChongqingPeople’s Republic of China
  2. 2.Dongfang Turbine Co., Ltd.DeyangPeople’s Republic of China

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