TY - JOUR
T1 - Determination of hydrogen compatibility for solution-treated austenitic stainless steels based on a newly proposed nickel-equivalent equation
AU - Takaki, Setsuo
AU - Nanba, Shigenobu
AU - Imakawa, Kazunari
AU - Macadre, Arnaud
AU - Yamabe, Junichiro
AU - Matsunaga, Hisao
AU - Matsuoka, Saburo
N1 - Funding Information:
This work was partially supported by the New Energy and Industrial Technology Development Organization (NEDO), Hydrogen Utilization Technology (2013–2018).
Publisher Copyright:
© 2016 Hydrogen Energy Publications LLC
PY - 2016/9/7
Y1 - 2016/9/7
N2 - The nickel-equivalent equation for the materials selection of solution-treated austenitic stainless steels in present Japanese regulations does not consider nitrogen, which can improve resistance to hydrogen embrittlement. For the authorization of various austenitic stainless steels for use in high-pressure hydrogen gas and based on investigations of eight types of solution-treated austenitic stainless steels, this paper presented a newly proposed nickel-equivalent equation considering nitrogen. After tensile testing to the true strain ε of 0.3 in air at both room temperature (RT) and 228 K, the strain-induced martensite content VM was measured by a saturation magnetization technique; the VM correlated well with the proposed nickel-equivalent equation. For slow strain rate tensile (SSRT) testing in hydrogen gas at RT, the relative reduction in area (RRA) was consistently lower with increased VM for ε = 0.3 at 228 K. This suggests that the austenitic phase stability is crucial in determining the RRA of the present austenitic stainless steels and the RRA was successfully quantified by the proposed equation.
AB - The nickel-equivalent equation for the materials selection of solution-treated austenitic stainless steels in present Japanese regulations does not consider nitrogen, which can improve resistance to hydrogen embrittlement. For the authorization of various austenitic stainless steels for use in high-pressure hydrogen gas and based on investigations of eight types of solution-treated austenitic stainless steels, this paper presented a newly proposed nickel-equivalent equation considering nitrogen. After tensile testing to the true strain ε of 0.3 in air at both room temperature (RT) and 228 K, the strain-induced martensite content VM was measured by a saturation magnetization technique; the VM correlated well with the proposed nickel-equivalent equation. For slow strain rate tensile (SSRT) testing in hydrogen gas at RT, the relative reduction in area (RRA) was consistently lower with increased VM for ε = 0.3 at 228 K. This suggests that the austenitic phase stability is crucial in determining the RRA of the present austenitic stainless steels and the RRA was successfully quantified by the proposed equation.
UR - http://www.scopus.com/inward/record.url?scp=84991716193&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84991716193&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2016.06.193
DO - 10.1016/j.ijhydene.2016.06.193
M3 - Article
AN - SCOPUS:84991716193
SN - 0360-3199
VL - 41
SP - 15095
EP - 15100
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 33
ER -
