Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10408929 | Optics and Lasers in Engineering | 2005 | 12 Pages |
Abstract
We used electronic speckle pattern interferometry (ESPI) to measure in situ displacement fields nondestructively and with high resolution (â¼10â2 μm) by using the interferometry principle and the phase-shift technique. We measured the depth profile of the residual stress in steel pipe manufactured by thermomechanically controlled processing using a quantitative model, which explains the relationship between residual stress and displacement measured by ESPI in chemical etching. We analyzed the variation of yield stresses measured by the indentation technique and the residual stresses at various depths. The relationship between the residual stresses and the yield stresses was consistent with simulated results and can be used for indirect evaluation of the residual stresses from the yield stresses.
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Engineering
Electrical and Electronic Engineering
Authors
Dong-Won Kim, Nak-Kyu Lee, Kyoung-Hoan Na, Dongil Kwon,