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
-
초록
-
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.
-
목차
-
1. 서론
-
2. 실험방법
-
3. 결과 및 고찰
-
인장 및 파괴성질
-
인장시험시 α상 형상에 따른 소성변형 거동
-
파괴시험시 균열생성 및 성장거동
-
4. 결론
한국학술정보
