Study of the austenitic stainless steel with gradient structured surface fabricated via shot peening

2018 ◽  
Vol 215 ◽  
pp. 187-190 ◽  
Author(s):  
Yinsheng He ◽  
Keun-Bong Yoo ◽  
Houyu Ma ◽  
Keesam Shin
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Shot Peening ◽  
Structured Surface

XRD and EBSD studies of severe shot peening induced martensite transformation and grain refinements in austenitic stainless steel

2020 ◽  
Vol 168 ◽  
pp. 110574 ◽  
Author(s):  
Hongfei Liu ◽  
Yuefan Wei ◽  
Chee Kiang Ivan Tan ◽  
Dennise T. Ardi ◽  
Dennis C.C. Tan ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Shot Peening ◽  
Martensite Transformation ◽  
Severe Shot Peening

Effect of Pre-Shot Peening on Plasma Nitriding Kinetics of Austenitic Stainless Steel

2013 ◽  
Vol 634-638 ◽  
pp. 2955-2959 ◽  
Author(s):  
Lie Shen ◽  
Liang Wang ◽  
Jiu Jun Xu ◽  
Ying Chun Shan
Keyword(s):  
Stainless Steel ◽  
Surface Layer ◽  
Austenitic Stainless Steel ◽  
Shot Peening ◽  
Plasma Nitriding ◽  
Nitrogen Diffusion ◽  
X Ray Diffraction ◽  
304 Austenitic Stainless Steel ◽  
Strain Induced Martensite ◽  
Kinetics Of

The fine grains and strain-induced martensite were fabricated in the surface layer of AISI 304 austenitic stainless steel by shot peening treatment. The shot peening effects on the microstructure evolution and nitrogen diffusion kinetics in the plasma nitriding process were investigated by optical microscopy and X-ray diffraction. The results indicated that when nitriding treatments carried out at 450°C for times ranging from 0 to 36h, the strain-induced martensite transformed to supersaturated nitrogen solid solution (expanded austenite), and slip bands and grain boundaries induced by shot peening in the surface layer lowered the activation energy for nitrogen diffusion and evidently enhanced the nitriding efficiency of austenitic stainless steel.

The Evolution of Residual Stress and Microstructure in Shot Peened S30432 Austenitic Stainless Steel at High Temperatures

2013 ◽  
Vol 768-769 ◽  
pp. 557-563
Author(s):  
Ke Zhan ◽  
Chuan Hai Jiang ◽  
Henry Pan
Keyword(s):  
Residual Stress ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
High Temperatures ◽  
Exposure Time ◽  
Shot Peening ◽  
Thermal Relaxation ◽  
Domain Size ◽  
Line Profile Analysis ◽  
Relaxation Energy

The thermal relaxation behavior of residual stress and microstructure at high temperatures in S30432 austenitic stainless steel after shot peening was investigated by X-ray residual stress analyzer. The effects of exposure time and applied temperature on the residual stress and microstructure relaxation were particularly analyzed and discussed. A significant decrease of the residual stress values were observed in the first period of exposure time, followed by slowing down and then stabilization. It was also observed that a higher applied temperature produced greater relaxation. In terms of microstructure, the domain size and micro-strain were calculated by Voigt method, the results showed that the refined domain size and high micro-strain induced by shot peening were greatly relaxed at the first stage of annealing, then stabilized. With higher annealing temperature, the recrystallization behavior in the shot peened deformed layer was more obvious. Based on the results of line profile analysis, the recrystallization activation energy and micro-strain relaxation energy were calculated, respectively.

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