Mechanism of reduction of fretting fatigue limit caused by hydrogen gas in SUS304 austenitic stainless steel
Mechanism of reduction of fretting fatigue limit caused by hydrogen gas in SUS304 austenitic stainless steel
复制标题
氢气降低SUS304奥氏体不锈钢微动疲劳极限的机理
DOI：
10.1016/j.triboint.2010.11.004
复制
发表时间：
2011
影响因子：
6.2
通讯作者：
et al
中科院分区：
文献类型：
--
作者：
Masanobu Kubota;et al
预应变的SUS304在氢气中的微动疲劳强度降低。对还原机理进行了探讨。在氢气中，接触表面发生局部粘连，粘附处形成许多小裂纹。主裂纹从其中一个小裂纹扩展而来。通过两步环境试验考察了附着力对小裂纹萌生和扩展的影响。当用氧化膜防止粘连时，试件没有失效。可以推测，由于局部粘结，在氢气中的应力条件比在空气中更严重。
The fretting fatigue strength of pre-strained SUS304 is reduced in hydrogen gas. The mechanism of the reduction is discussed. In hydrogen gas, local adhesion between contacting surfaces occurred and many small cracks were formed at the adhered spots. The major crack propagated from one of the small cracks. The roles of the adhesion in relation to the initiation and propagation of the small cracks were examined by a two-step environment test. When adhesion was prevented by an oxidized film, no failure of the specimen occurred. It can be presumed that the stress conditions were more severe in hydrogen gas than that in air due to local adhesion.