Journal Published Online: 11 December 2012
Volume 41, Issue 1

An Investigation of Hydrogen Environment Effect on the Strain Aging of Low-Carbon Steel through Vickers Hardness Test

CODEN: JTEVAB

Abstract

In recent years, increasing attention has been paid to the effect of a hydrogen environment on the fatigue limit of hydrogen-power systems and infrastructure. In carbon steel, strain aging is one of the important factors influencing non-propagating crack behavior, which is related to the fatigue limit. In the present study, to investigate the effects of hydrogen on the strain aging of low-carbon steel (0.13 % carbon steel), Vickers hardness tests were carried out on the carbon steel. A couple of 0.13 % carbon steel specimens with a large-scale plastic zone were aging heat-treated; one was a hydrogen-charged specimen, whereas the other was an uncharged specimen. The Vickers hardness of the hydrogen-charged specimen was found to be lower than that of the uncharged specimen. This observation implies that hydrogen inhibits strain-aging hardening of low-carbon steel. The observation also suggests that hydrogen could affect the non-propagating crack behavior through the inhibition of strain aging.

Author Information

Lee, Dongsun
Dept. of Mechanical Engineering Science, Graduate School of Engineering, Kyushu Univ., Nishi-ku, Fukuoka, JP
Yamamoto, Aki-nori
Dept. of Mechanical Engineering Science, Graduate School of Engineering, Kyushu Univ., Nishi-ku, Fukuoka, JP
Oda, Yasuji
Dept. of Mechanical Engineering, Faculty of Engineering, Kyushu Univ., Nishi-ku, Fukuoka, JP The Research Center for Hydrogen Industrial Use and Storage (HYDROGENIUS), National Institute of Advanced Industrial Science and Technology (AIST), Nishi-ku, Fukuoka, JP
Noguchi, Hiroshi
Dept. of Mechanical Engineering, Faculty of Engineering, Kyushu Univ., Nishi-ku, Fukuoka, JP The Research Center for Hydrogen Industrial Use and Storage (HYDROGENIUS), National Institute of Advanced Industrial Science and Technology (AIST), Nishi-ku, Fukuoka, JP
Pages: 7
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Stock #: JTE20120190
ISSN: 0090-3973
DOI: 10.1520/JTE20120190