Fretting fatigue in hydrogen gas
Fretting fatigue in hydrogen gas
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DOI：
10.1016/j.triboint.2006.02.014
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发表时间：
2006-10-01
影响因子：
6.2
通讯作者：
Kondo, Yoshlyuki
中科院分区：
文献类型：
--
作者：
Kubota, Masanobu;Noyama, Naoki;Kondo, Yoshlyuki
为了明确氢气对氢利用机用材料微动疲劳强度的影响，在氢气中进行了微动疲劳试验。在强度设计中考虑微动疲劳非常重要，因为许多疲劳失效事故发生在部件之间的接头或接触部位。作为实验的一部分，本文重点关注奥氏体不锈钢。材质为SUS 304。与空气中相比，氢气中的微动疲劳强度降低。切向力系数按微动疲劳强度的相反顺序增加。因此，微动疲劳强度降低的原因之一是切向力随环境不同而不同。检测到在氢气中微动时发生氢吸收。吸收可以被认为是微动疲劳强度降低的原因之一，因为充氢降低了预充试件的微动疲劳寿命，并且降低了短疲劳裂纹的裂纹扩展阈值。 (c) 2006 Elsevier Ltd. 保留所有权利。
To clarify the effect of hydrogen gas on fretting fatigue strength of the materials, which supposed to be used for hydrogen utilization machines, fretting fatigue tests were conducted in hydrogen gas. It is important to take fretting fatigue into account in strength design, because many fatigue failure accidents have occurred at joints or contact parts between components. As a part of the experiments, an austenitic stainless steel was focused in this paper. The material was SUS 304. Fretting fatigue strength in hydrogen gas decreased compared with that in air. Tangential force coefficient increased in the reverse order of fretting fatigue strength. Therefore, one of the reasons of the decrease of fretting fatigue strength was that tangential force was different depending on the environment. Absorption of hydrogen occurred during fretting in hydrogen gas was detected. The absorption could be considered as one of the causes of the decrease of fretting fatigue strength, since fretting fatigue life of pre-charged specimen was decreased and also the crack propagation threshold of short fatigue crack was reduced by hydrogen charge. (c) 2006 Elsevier Ltd. All rights reserved.