21101 腐食ピットが発生している船体構造部材の引張強度特性(材料力学(破壊))

抄録

Pitting corrosion has been observed in structural members of bulk carriers carrying coal and iron ore after long-term use. In order to investigate the effect of pitting corrosion on tensile strength, a series of tensile tests has been conducted. It has been revealed that tensile strength decreases gradually and total elongation decreases drastically with the increase of thickness loss due to pitting corrosion. It is considered that the reduction of tensile strength and total elongation is caused by the unevenness of the plates and mechanical properties of the material itself didn't change after long-term use.