摘要
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%。
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.
出处
《失效分析与预防》
2014年第6期347-351,共5页
Failure Analysis and Prevention
