A7079-T6高強度アルミニウム合金のき裂伝ぱに及ぼす繰り返し速度の影響 : 第2報:大気湿度の影響

概要

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The fatigue crack growth tests of the A7079-T6 high strength aluminum alloy were conducted in the atmosphere of 10% to 75% humidity, under the cyclic load of 2Hz and 0.02Hz, and the influence of humidity on the crack growth became clear. As a result, the life, namely the number of cycles to failure, decreases rapidly as the humidity increases to 50%, but in more than 50 % humidity, the life was constantly short. The life with 0.02Hz and 75% humidity was one-quarter of that with 2Hz and 10%. Moreover, it appears the cyclic load rate has little effect on the life. Thus, it can be concluded that the life depends on the humidity in the air, rather than on cyclic load rate.
鶴岡工業高等専門学校の論文