Failure Analysis of Stainless Steel Bolt

DOI

10.2991/icmsa-15.2015.173How to use a DOI?

Keywords

Bolt, Hydrogen brittleness fracture, Intensity, Assembly stress, Hydrogen content.

Abstract

Two stainless steel bolts of the motor components assembly fractured after serving for eight hours. The fracture feature and cause of the bolt were analyzed by appearance observation, micro and macro observation on fracture surfaces, metallographic examination, hardness testing. The results show that the fracture mode of the bolts is hydrogen brittleness fracture. The high intensity and biggish assembly stress led to the hydrogen brittleness fracture of the bolt. Meanwhile, there is a lack of dehydrogenation disposal after inactivating technology in the entire technological process. It is proposed that the intensity should be in the range of criterion requirements, and the dehydrogenation disposal should be disposed after passivation technology according to standard. What’s more, the assembly stress should be controlled strictly to avoid early stage damage of bolt.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Chun-Yan Hu
AU  - Xin-Ling Liu
AU  - Chun-Hu Tao
AU  - Yu-Huai He
PY  - 2014/06
DA  - 2014/06
TI  - Failure Analysis of Stainless Steel Bolt
BT  - Proceedings of the 2015 International Conference on Material Science and Applications
PB  - Atlantis Press
SP  - 932
EP  - 936
SN  - 2352-541X
UR  - https://doi.org/10.2991/icmsa-15.2015.173
DO  - 10.2991/icmsa-15.2015.173
ID  - Hu2014/06
ER  -