Effect of Shot Peening on Microstructure and Residual Stress of SAF2507 Ferritic-Austenitic Duplex Stainless Steel

SHI Xu; CHEN Ming; JIANG Chuanhai

doi:10.11973/jxgccl201907013

Materials and Mechanical Engineering > 2019 > 43(7): 59-63. > DOI: 10.11973/jxgccl201907013

SHI Xu, CHEN Ming, JIANG Chuanhai. Effect of Shot Peening on Microstructure and Residual Stress of SAF2507 Ferritic-Austenitic Duplex Stainless Steel[J]. Materials and Mechanical Engineering, 2019, 43(7): 59-63. DOI: 10.11973/jxgccl201907013

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Effect of Shot Peening on Microstructure and Residual Stress of SAF2507 Ferritic-Austenitic Duplex Stainless Steel

1. AECC Shenyang Liming Aero-Engine Co., Ltd., Shenyang 110043, China;
2. School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China

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Received Date: January 16, 2019
Revised Date: June 09, 2019

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Abstract

SAF2507 ferrite-austenite duplex stainless steel surface was treated by shot peening. Effects of shot peening on surface roughness, microstructure and residual stress of the tested steel were studied by X-ray stress analysis and diffraction line-profile analysis. The results show that after shot peening, there were fewer dislocations in ferrite phase, a large number of dislocations in austenite phase, and the surface roughness of tested steel increased. The surface grain of the tested steel was refined, the micro-distortion and dislocation density increased. High residual compressive stress was introduced in the near surface layer of the tested steel by shot peening. The maximum compressive stress in austenite phase and ferrite phase appeared in the subsurface layer, with values of 915 MPa and 763 MPa, respectively.
- shot peening,
- duplex stainless steel,
- X-ray stress analysis,
- line-profile analysis

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Effect of Shot Peening on Microstructure and Residual Stress of SAF2507 Ferritic-Austenitic Duplex Stainless Steel

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