과시효열처리한 Al-4.2Zn-1.8Mg 합금의 피로균열전파에 관한 고찰

• 영문명: A Study on the Overaging Treatment the Fatigue Crack Propagation of Al-4.2Zn-1.8Mg Alloy
• 발행기관: 한국산업기술융합학회(구. 산업기술교육훈련학회)
• 저자명: 박형래(Hyung-Lae Park)
• 간행물 정보: 『산업기술연구논문지』산업기술교육훈련논문지 제17권 2호, 147~153쪽, 전체 7쪽
• 주제분류: 공학 > 공학일반
• 파일형태: PDF
• 발행일자: 2012.06.30

영문 초록

This study is to investigate the effect of heat-treatment on fatigue crack propagation. Three types of heat-treatment were used to study the effect of heat-treatment on the mechanical properties in Al-4.2Zn-1.8Mg alloy. The three heat-treatment conditions are peak-aged(T6) and over-aged(T7), respectively. Mechanicai properties sush as yield strength and tensile strength were observed to be more superior in TMT conditions the other conditions. (1) TMT condition exhibited the highest tensile strength and the peakaged condition followed, (2) △Kth was 6.3 MPa√m for the peakaged condition, 4.6 MPa√m for TMT condition, and 4.51 MPa√m for the overaged condition, (3) Fatigue crack propagation resistance of the peakaged condition was obviously higher for low and intermediate levels of △K, but indifferent for high level of △K.

목차

Ⅰ. 서 론

Ⅱ. 실험 방법

Ⅲ. 실험결과 및 고찰

Ⅳ. 결 론

키워드

Al-4.7Zn-1.8Mg합금(Al 7005합금) Overaging Treatment(과시효열처리) Fatigue Crack(피로균열) Peak-Aged(T6, 담금질 후 인공시효) Yield Strength(항복강도)