アルミニウム合金の腐食疲労過程における複数き裂の分布特性と疲労寿命

概要

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rights: 本文データは社団法人日本機械学会の許諾に基づきCiNiiから複製したものであるIn order to investigate the effects of the distributed surface cracks on corrosion fatigue crack propagation period N_p, rotary bending fatigue tests were performed on aluminium alloy in a sodium chloride aqueous solution by using 12 specimens under constant experimental conditions. N_p for the specimen tested in the lower stress amplitude (52 MPa) showed a tendency to decrease with increasing crack density or sum total of crack lengths observed on the specimen surface during corrosion fatigue process. However, N_p for the specimen tested in the higher stress amplitude (90 MPa) did not depend on these parameters. In the lower stress amplitude, crack coalescence behaviour is a dominant factor influencing the experimental results, because the greater part of cracks initiated during the corrosion fatigue precess could not continue to propagate without crack coalescence.
一般社団法人日本機械学会の論文
1989-07-25