알루미늄 합금재의 미소원공결함이 피로크랙 전파거동에 미치는 영향

• 영문명: The Influence of the fatigue Crack Propagation Behavior on the Small Circular hole Defect in Aluminum Alloys
• 발행기관: 한국항해항만학회
• 저자명: 김건호(G.H.KIM) 임재근(J.K.LIM) 최순열(S.Y.CHOE) 이호연(H.Y.LEE)
• 간행물 정보: 『한국항해항만학회 학술대회논문집』2008년도 공동학술대회 지구환경변화와 해양산업의 전망 논문집, 33~35쪽, 전체 3쪽
• 주제분류: 공학 > 해양공학
• 파일형태: PDF
• 발행일자: 2008.06.30

영문 초록

We carried out with materials of aluminum alloy(7075-T6, 2024-T4) by rotary bending fatigue tester. We investigated fatigue limit, fatigue crack initiation, fatigue crack propagation behavior and possibility of fatigue life prediction to the different small circular hole defect. The summarized result are as follows ; Fatigue limit of the smooth specimens were related tensile strength and yield strength. In case of more large applied stress and small circular hole crack defect, the fatigue crack was grown rapidly. The fatigue crack propagation behavior proceed at according to inclusion. Fatigue crack propagation ration appeared instability and retardation phenomenon in the first half of fatigue life but appeared stability and replied in the latter half. We are think on account of size of the small circular hole defect. On other hand, this experimental data of the materials are appeared fatigue life predictability.

목차

Abstract

1. 서론

2. 시험재료 및 실험방법

3. 결과 및 고찰

4장 결론

참고문헌

키워드

미소원공결함 피로한도 피로크랙전파거동 피로크랙길이 피로파단수명비 피로수명 Small circular hole defect Fatigue limit Fatigue propagation behavior Fatigue crack length Fatigue crack life ratio Fatigue life