Ti-6Al-4V 합금의 α상 형상에 따른 미세균열 생성거동
= The Effect of α-Phase Morphology on the Microcrack initiation Behavior of a Ti-6Al-4V Alloy
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다국어 초록 (Multilingual Abstract)
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The purpose of this study is to investigate the deformation characteristics and microcrack initiation behavior depending on the microstructure of Widmanstatten-α(Wα) and equiaxed-α(Eα) in a Ti-6Al-4V Alloy. In Wα structure, microcracks were observed to form along the α/β interfaces, the colony boundaries and the grain boundary α layers both in tension and fracture tests. In Eα structure, most of microvoids were found to form at the α/β interfaces. The lower tensile strength and ductility of Wα structure was mainly due to the strain localization along the prior β grain boundaries and colony boundaries, which was preceded by the easy slip transfer through α/βinterfaces within the colony. The large increase in fracture toughness of Wα structure was, however, primarily attributed to the crack path deviation depending on the colony orientation.
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목차
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1. 서론
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2. 실험방법
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3. 결과 및 고찰
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인장 및 파괴성질
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인장시험시 α상 형상에 따른 소성변형 거동
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파괴시험시 균열생성 및 성장거동
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4. 결론
한국학술정보
