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J. Ocean Eng. Technol. 1993;7(2):103-113.    

Failure Analysis in Al 7075-T651 Alloy using X-ray Diffraction Technique
X-선 회절을 이용한 A1 7075-T651합금의 파손해소
오세욱,박수영,부명환
동아대학교 기계공학과,동아대학교 기계공학과,동아대학교 기계공학과
© 1993 The Korean Society of Ocean Engineers     Open access / Under a Creative Commons License
Keywords: X-ray diffraction, Plane spacing, Half-value breadth, Diffraction pattern, X-ray fractography
핵심용어: X선 회절, 면문거리, 반가폭, 회절도형
Abstract
X-ray diffraction analysis technique was used for the fatigue damage analysis and fatigue life prediction in Al 7075-T651 alloy. The tensile test, fatigue strength and fatigue crack propagation test with change of stress ratio were carried out. As a result, half-value breadth was increased with the plastic deformation in the specimen increasint at all test conditions. In particular, half-value breadth at the surface of the specimens fractured by fatigue was increased as stress intensity factor range and effective stress intensity factor range were increased. In addition, the good relationship between half-value breadty and diffraction pattern was shown.
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