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Title: Effect of shot peening and grit blasting on surface integrity : influence on residual stresses
Authors: Tosha, K
Lu, J
Keywords: Critical thickness
Projection area
Residual stress
Shot peening
Surface integrity
X-ray diffraction
Issue Date: 2006
Publisher: Nonferrous Metals Society of China, Zhongguo Youse Jinshu Xuehui
Source: Transactions of Nonferrous Metals Society of China (中国有色金属学会会刊) (英文版), 2006, v. 16, no. suppl. 2, p. 230-235 How to cite?
Journal: Transactions of Nonferrous Metals Society of China (中国有色金属学会会刊) (英文版) 
Abstract: The influences of factors such as particle size (0.55-2.2 mm), particle velocity (15-35 m/s) and thickness of work material on the surface integrity were investigated. The residual stresses induced by shot peening or grit blasting were examined. In order to clarify the influences of those factors on residual stress included in the surface integrity, a medium carbon steel (w(C)= 0.45%, 180 HV) was peened by a centrifugal type peening machine using cast steel particles (650-800 HV). The results show that the compressive residual stresses on the peened surface are larger than those of grit blasting; the critical thickness of shot peening is about 50% thicker than that of grit blasting; the high compressive stresses induced by blasting are owing to the wrought or peening effect.
ISSN: 1003-6326
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