CAJ | 학술논문

开展了7N01-T4铝合金在实验室空气下室温、100℃和-60℃3种温度条件的疲劳S-N曲线测试,研究了不同温度对7N01-T4铝合金疲劳性能的影响。结果表明：-60℃环境对7N01-T4铝合金疲劳性能是有益的,而100℃环境会降低其疲劳性能；7N01-T4铝合金在室温、100℃和-60℃环境下的缺口敏感度系数分别为0.63、0.60和0.59,这3种温度环境对7N01-T4铝合金敏感度系数基本没有影响；100℃环境Kt =1和Kt =3下的DFR值比室温分别下降24%和16%；-60℃环境Kt =1和Kt =3下的DFR值比室温分别提高42%和14%。
개전료7N01-T4려합금재실험실공기하실온、100℃화-60℃3충온도조건적피로S-N곡선측시,연구료불동온도대7N01-T4려합금피로성능적영향。결과표명：-60℃배경대7N01-T4려합금피로성능시유익적,이100℃배경회강저기피로성능；7N01-T4려합금재실온、100℃화-60℃배경하적결구민감도계수분별위0.63、0.60화0.59,저3충온도배경대7N01-T4려합금민감도계수기본몰유영향；100℃배경Kt =1화Kt =3하적DFR치비실온분별하강24%화16%；-60℃배경Kt =1화Kt =3하적DFR치비실온분별제고42%화14%。
The fatigue S-N curves of 7N01 -T4 aluminum alloy were tested at room temperature, 100℃ and -60℃; the influence of the fatigue properties were investigated in different temperature environment. The test results show that -60℃temperature environment is beneficial to the fatigue property of 7N01-T4 aluminum alloy, and 100℃ temperature environment reduces the fatigue property of 7N01-T4 aluminum alloy. The notch-sensitivity factors of room temperature, 100℃ and -60℃are 0. 62, 0. 60 and 0. 59, respectively. The three kinds of temperature environments don’ t influence the notch-sensitivity factors. The DFR values of Kt =1 and Kt =3 specimens at 100℃ decrease by 24% and 16% respectively compared with room temperature, and the DFR values of Kt =1 and Kt =3 specimens at -60℃ increase by 42% and 14% respectively compared with room temperature.