강화기구 제어에 따른 석출경화형 Al 합금의 피로특성 변화 연구

• 영문명: Effects of the Strengthening Mechanism on Fatigue Properties of Precipitation-Hardened Al Alloy
• 발행기관: 한국산업기술융합학회(구. 산업기술교육훈련학회)
• 저자명: 김원회(Won-Hoe Kim)
• 간행물 정보: 『산업기술연구논문지』산업기술연구논문지 제26권 1호, 1~8쪽, 전체 8쪽
• 주제분류: 공학 > 공학일반
• 파일형태: PDF
• 발행일자: 2021.03.31

영문 초록

The effects of the strengthening mechanism on the fatigue properties of Al-Mg-Si alloy were investigated. Annealing was conducted to minimize the precipitation-hardening effects on Al-Mg-Si alloy, as it could be the most efficient method to stabilize the precipitates. Severe plastic deformation was adapted to obtain grain-refining and work-hardening effects after the annealing process. To evaluate the change in fatigue properties and to investigate the dominant strengthening mechanisms in the specimens, fatigue crack propagation and low-cycle fatigue tests were performed. The experimental results showed that the fatigue crack propagation rate of the annealed specimen was higher than those of other specimens that were grain-refined and precipitation-hardened. During the low-cycle fatigue test, the annealed specimen exhibited cyclic hardening and saturation behavior, whereas the grain-refined specimen exhibited saturation and softening behavior. The low-cycle fatigue life and characteristics of the hysteresis loops of the specimens were evaluated using various parameters. Precipitation-hardened specimens exhibited higher fatigue strength and ductility coefficients than those under other conditions.

목차

Ⅰ. 서론

Ⅱ. 실험

Ⅲ. 실험결과 및 고찰

Ⅳ. 결론

참고문헌

키워드

석출경화형 Al 합금 저주기 피로 피로응력반응곡선 피로이력곡선 피로균열전파 Precipitation Hardening Al Alloy Low Cycle Fatigue Cyclic Stress Response Curve Fatigue Hysteresis Loop Fagitue Crack Propagation