페라이트-마르텐사이트 복합 조직강의 피로한도에 미치는 마르텐사이트 조직형태의 영향

• 영문명: Effects of the Type of Martensite on Fatigue Limit of Ferrite-Martensitic Steel
• 발행기관: 강원대학교 산업기술연구소
• 저자명: 김민건(Kim Min Gun) 지정근(Ji Jueng Keun)
• 간행물 정보: 『산업기술연구』vol.20, 1~8쪽, 전체 8쪽
• 주제분류: 공학 > 공학일반
• 파일형태: PDF
• 발행일자: 2000.09.30

영문 초록

A study has been made on the behavior of microscopic fatigue crack growth at the stress level of the fatigue limit with ferrite-martensitic structures. For the above purpose, two types of the microstructures were prepared ; one is the microstructure having the ferrite encapsulating the islands of second phase martensite(FEM), the other is the microstructure with the martensite encapsulating the islands of ferrite(MEF). It has been pointed out that the fatigue limits of these microstructures are related to the critical stress at which the microcrack in the MEF microstructure in which the critical crack length would be restricted within the second phase spacing in contrast with the FEM microstruture. However, the fatigue tests shows that no appreciable difference of the fatigue limits among them were recognized. Also, it turned out from the metallographic observations that the micro crack path is very much affected by the microstructures, so that the microcracks grow according to the 3-dimentional situation of its microstructures.

목차

Abstract

1. 서론

2. 시험편의 준비 및 실험방법

3. 결과 및 고찰

4. 결론

참고문헌

키워드

페라이트-마르텐사이트 강 피로한도 미시균열 ferrite-martensitic steel fatigue limit micro-crack