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J Chin Soc Corr Pro  2010, Vol. 30 Issue (1): 89-92    DOI:
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MECHANICAL BEHAVIORS OF 5Cr TUBING AFTER ELECTROCHEMICAL HYDROGEN CHARGING
XUE Yan1; ZHAO Guoxian1; DONG Hui2; ZHAO Dawei1
1. School of Materials Science and Engineering; Xi'an Shiyou University; Xi'an 710065
2. Xi'an Maurer Petroleum Engineering Laboratory; Xi'an 710065
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Abstract  

Tensile tests were used to investigate the mechanical behaviors of 5Cr tubing after electrochemical hydrogen charging. The experiment results show that the tensile strength and the plasticity decreased with the increase of pre-charging time and pre-charging density. Analysis on the fracture morphology by scanning electron microscope(SEM) indicated that the fracture surfaces of 5Cr tubing were characteristic of ductile dimple fracture pattern after electrochemical hydrogen charging. The diameter and depth of ductile dimple were smaller than the specimen without charging, but the number of ductile dimple was increased, which means that the loss of plastic properties was increased. When the hydrogen concentration reached a certain value, the fracture mode was changed from ductile fracture to brittle fracture.

Key words:  5Cr tubing      electrochemical hydrogen charging      mechanical properties      fracture morphology     
Received:  20 April 2009     
ZTFLH: 

TG113.25

 
Corresponding Authors:  ZHAO Guoxian     E-mail:  zhaoguoxianxian@sina.com

Cite this article: 

XUE Yan; ZHAO Guoxian; DONG Hui; ZHAO Dawei. MECHANICAL BEHAVIORS OF 5Cr TUBING AFTER ELECTROCHEMICAL HYDROGEN CHARGING. J Chin Soc Corr Pro, 2010, 30(1): 89-92.

URL: 

https://www.jcscp.org/EN/     OR     https://www.jcscp.org/EN/Y2010/V30/I1/89

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