期刊
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
卷 209, 期 8, 页码 3879-3886出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2008.09.006
关键词
Elasto-plastic material law; Finite elements; Impact; Surface treatment; Residual stress
资金
- Champagne-Ardenne Region and the European Union
Shot-peening is an industrial surface treatment used to improve fatigue life of mechanical components. This process generates a compressive residual stress field on the part's surface and offers a protection against crack initiation and propagation, corrosion, etc. Although the consequences of the process on fatigue life are well known, the physical influence of the relevant parameters is not fully understood. Few of the existing shot-peening models are thus able to reproduce the correct residual stress field obtained via the actual process. This paper presents a finite element simulation of an impact including thermo-mechanical effects to investigate the influence of temperature on the residual stress field obtained through shot-peening. The influence of parameters of the process such as velocity, radius and hardness of the shot has also been studied in relation with thermal effects. it is observed that the temperature can reach 200 degrees C in the material. Further, the temperature significantly affects the residual stress field for high shot velocities. It can be concluded that shot-peening is a complex combination of physical processes, including thermal effects, which should be taken into account to better master this manufacturing process. (C) 2008 Elsevier B.V All rights reserved.
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