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The influence of hydrogen on deformation under the elastic stress in mooring chain steel

机译：氢对系泊链钢在弹性应力作用下变形的影响

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摘要

The cyclic deformation was investigated under cyclic stress with different maxima in seawater or simultaneously charging hydrogen for a tempered mooring chain steel. The loss of fatigue life in seawater is similar as that charged hydrogen, suggesting that the deterioration in lifetime caused by harsh seawater should mainly result from hydrogen evolution rather than anodic dissolution. Hydrogen can enhance bowing mobility of mobile dislocation and hence increase the recoverable displacement although local plastic is not obvious. In the meantime, hydrogen can promote the diminution of elastic modulus, which is always accompanied by an extra of internal friction.
机译：研究了在海水中具有不同最大值的循环应力下的循环变形，或者对回火系泊链钢同时充氢进行了研究。海水中疲劳寿命的损失与带氢的相似，这表明由苛刻的海水引起的寿命下降主要应归因于氢的释放而不是阳极溶解。氢可以增强活动位错的弯曲能力，因此尽管局部塑性不明显，但可以增加可恢复位错的屈曲性。同时，氢可以促进弹性模量的减小，这总是伴随着额外的内部摩擦。

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