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http://dx.doi.org/10.3795/KSME-A.2003.27.5.673

A Study on Prediction of Stress Intensity Factor and Fatigue Crack Growth Behavior Using the X-ray Diffraction Technique  

Lim, Man-Bae (한국원자력연구소)
Boo, Myung-Hawn (한국원자력연구소)
Kong, Yu-Sik (동의대학교 기계산업시스템공학부)
Yoon, Han-Ki (동의대학교 기계산업시스템공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.27, no.5, 2003 , pp. 673-680 More about this Journal
Abstract
This study verified the relationship between fracture mechanics parameters(ΔK, ΔK$\sub$eff/, K$\sub$max/) and X-ray parameters (${\alpha}$$\sub$r/, B) for SG365 steel at elevated temperature up to 300$^{\circ}C$. The fatigue crack propagation test were carried out and X-ray diffraction technique according to crack length direction was applied to fatigue fractured surface. The residual stress on the fracture surface was found to increase low ΔK region, reach to a maximum value at a certain value of K$\sub$max/ or ΔK and then decrease. Residual stress were independent on stress ratio by arrangement of ΔK and half value breadth were independent by the arrangement of K$\sub$max/. The equation of ${\alpha}$$\sub$r/ - ΔK was established by the experimental data. Therefore, tincture mechanics parameters could be estimated by the measurement of X-ray parameters.
Keywords
X-ray Diffraction; Fatigue Crack Propagation Rate; Residual Stress; Half-Value Breadth; Stress Intensity Factor; Fatigue Fractured Surface;
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