TY - JOUR
T1 - Improved hydrogen embrittlement resistance after quenching–tempering treatment for a Cr-Mo-V high strength steel
AU - Wang, Yafei
AU - Hu, Songyan
AU - Li, Yun
AU - Cheng, Guangxu
N1 - Funding Information:
This work is supported by the National Basic Research Program of China (973 Program, Grant No.2015CB057602), China Postdoctoral Science Foundation (Grant No. BX20180245, 2018M643637) and Fundamental Research Funds for the Central Universities (Grant No. XZY012019024).
Funding Information:
This work is supported by the National Basic Research Program of China (973 Program, Grant No. 2015CB057602 ), China Postdoctoral Science Foundation (Grant No. BX20180245 , 2018M643637 ) and Fundamental Research Funds for the Central Universities (Grant No. XZY012019024 ).
Publisher Copyright:
© 2019 Hydrogen Energy Publications LLC
PY - 2019/11/5
Y1 - 2019/11/5
N2 - The effect of quenching-tempering (QT) treatment on the hydrogen embrittlement (HE) resistance of a reactor pressure vessel steel was studied. Decomposition of M3C/VC carbides and precipitation of M7C3 carbides were confirmed by transmission electron microscopy and atom probe tomography observations. Tensile tests showed that HE sensitivity decreased to a negligible level after QT treatment. The improvement of HE resistance was mainly attributed to the decreased number of M3C carbides which act as the reversible trapping sites for hydrogen. This was supported by the decreased concentration of reversible hydrogen as measured by thermal desorption spectroscopy. The amount of irreversible hydrogen (probably trapped at VC carbides) also decreased, which is however not considered responsible for the HE improvement.
AB - The effect of quenching-tempering (QT) treatment on the hydrogen embrittlement (HE) resistance of a reactor pressure vessel steel was studied. Decomposition of M3C/VC carbides and precipitation of M7C3 carbides were confirmed by transmission electron microscopy and atom probe tomography observations. Tensile tests showed that HE sensitivity decreased to a negligible level after QT treatment. The improvement of HE resistance was mainly attributed to the decreased number of M3C carbides which act as the reversible trapping sites for hydrogen. This was supported by the decreased concentration of reversible hydrogen as measured by thermal desorption spectroscopy. The amount of irreversible hydrogen (probably trapped at VC carbides) also decreased, which is however not considered responsible for the HE improvement.
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U2 - 10.1016/j.ijhydene.2019.09.142
DO - 10.1016/j.ijhydene.2019.09.142
M3 - Article
AN - SCOPUS:85073142783
VL - 44
SP - 29017
EP - 29026
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
IS - 54
ER -
