MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Microstructural Evolution and Mechanical Response of the Surface of 18CrNiMo7-6 Steel after Multistep Shot Peening during Annealing
Peng FuChuanhai JiangVincent Ji
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2013 Volume 54 Issue 12 Pages 2180-2184

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Abstract

The variations of micro-structure, residual stress and micro-hardness for 18CrNiMo7-6 steel after triple shot peening (SP) against annealing temperature were studied. X-ray diffraction line profile analysis (XRDLPA) was used to identify the change of micro-structure and residual stress relaxation behaviors of the top surface for 18CrNiMo7-6 steel after SP. The results show that the micro-strain, dislocation density, stored energy, compressive residual stress (CRS) and micro-hardness of the top surface of 18CrNiMo7-6 steel after SP decrease with the increase of annealing temperature while the domain size increases with increasing annealing temperature. Meanwhile, the change rates of micro-structure the residual stress and micro-hardness are bigger at higher annealing temperatures.

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© 2013 The Japan Institute of Metals and Materials
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