Recovery and Recrystallization of Surface Deformation Layer of 18CrNiMo7-6 Steel after Shot Peening during Isothermal Annealing

Author:  F. Peng, J. Chuanhai, W.Qi, H.Jun
Source:  Conf Proc 2014: ICSP-12 Goslar, Germany (pgs.272-276)
Doc ID:  2014088
Year of Publication:  2014
Abstract:  
Variations of micro-structure, residual stress of 18CrNiMo 7-6 steel after triple shot peening (TSP) against annealing time and temperature were studied. X-ray diffraction line profile analysis (XRDLPA) was used to identify changes of the micro-structure and residual stress relaxation behaviors of top surface of 18CrNiMo7-6 steel after TSP with intensity of 0.50 + 0.30 + 0.15 mmA during isothermal annealing. Results show that micro-strain and compressive residual stress (CRS) on top surface of 18CrNiMo7-6 steel after TSP decreases with the increases of annealing time while domain size increases with increasing annealing time at four fixed different temperatures. At the fixed time, changing rate of micro-structure and residual stress is bigger at higher annealing temperatures.