ESPI combined with hole drilling method to evaluate heat treatment induced residual stresses

Jie Cheng; Si-Young Kwak; Jeong-Kil Choi

doi:10.1117/12.819624

31 December 2008 ESPI combined with hole drilling method to evaluate heat treatment induced residual stresses

Jie Cheng, Si-Young Kwak, Jeong-Kil Choi

Proceedings Volume 7130, Fourth International Symposium on Precision Mechanical Measurements; 71302C (2008) https://doi.org/10.1117/12.819624
Event: Fourth International Symposium on Precision Mechanical Measurements, 2008, Anhui, China

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.

Citation Download Citation

Jie Cheng, Si-Young Kwak, and Jeong-Kil Choi "ESPI combined with hole drilling method to evaluate heat treatment induced residual stresses", Proc. SPIE 7130, Fourth International Symposium on Precision Mechanical Measurements, 71302C (31 December 2008); https://doi.org/10.1117/12.819624

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