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Proceedings Paper

ESPI combined with hole drilling method to evaluate heat treatment induced residual stresses
Author(s): Jie Cheng; Si-Young Kwak; Jeong-Kil Choi
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Paper Abstract

Heat from manufacturing processes like casting and heat treatment may cause localized expansion in parts. When these parts are cooled subsequently, some areas cool and contract more than others, leaving residual stresses, which may exert a considerably negative influence on both the structure's static strength and fatigue lifetime. So it is necessary to measure or predict the stress distribution in parts after heat treatment. In this study, residual stresses in the specimen are measured by ESPI (Electronic Speckle-Pattern Interferometry) combined with the hole drilling method. The material of specimen is SUS 304 austenitic stainless steel. It is quenched and water cooled subsequently. We also simulated the thermal stresses field induced by casting process by numerical analysis. As a result, comparisons of results from presented method as well as numerical solution are presented finally to give a conclusion on this residual stress measurement method in this paper.

Paper Details

Date Published: 31 December 2008
PDF: 6 pages
Proc. SPIE 7130, Fourth International Symposium on Precision Mechanical Measurements, 71302C (31 December 2008); doi: 10.1117/12.819624
Show Author Affiliations
Jie Cheng, Univ. of Science and Technology (Korea, Republic of)
Si-Young Kwak, Korea Institute of Industrial Technology (Korea, Republic of)
Jeong-Kil Choi, Korea Institute of Industrial Technology (Korea, Republic of)

Published in SPIE Proceedings Vol. 7130:
Fourth International Symposium on Precision Mechanical Measurements
Yetai Fei; Kuang-Chao Fan; Rongsheng Lu, Editor(s)

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