TY - JOUR
T1 - Effects of hydrogen and test frequency on fatigue properties of jis-sncm439 steel for storage cylinder of 70 Mpa hydrogen station
AU - Yano, Hiroki
AU - Homma, Nobuhiro
AU - Fukushima, Yoshihiro
AU - Macadre, Arnaud
AU - Furtado, Jader
AU - Matsuoka, Saburo
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2010/7
Y1 - 2010/7
N2 - Tension-compression fatigue tests on SNCM 439 steel for storage cylinder of 70 MPa hydrogen station were conducted under frequencies of 0.2, 2, 20 and 500 Hz with smooth specimens and specimens containing a small artificial hole. Hydrogen charging of the specimens was carried out by the hydrogen gas exposure method or the aqueous solution immersion method. The fatigue life of the hydroged charged specimens decreased in comparison with the uncharged specimens. The cluster of Al2O3 inclusions with the length of about 270 μm was at the fracture origins of smooth specimens. For the specimens containing a small artificial hole, it was observed an acceleration of fatigue crack growth rate for the hydrogen charged specimens when compared to the uncharged ones. However, it was verified that this acceleration rate has reached an upper limit, which was approximately 10 times the acceleration rate found for uncharged specimens. Considering this upper limit value of the acceleration of fatigue crack growth rate, the √area parameter model was applied to predict the fatigue strength of uncharged and hydrogen charged specimens.
AB - Tension-compression fatigue tests on SNCM 439 steel for storage cylinder of 70 MPa hydrogen station were conducted under frequencies of 0.2, 2, 20 and 500 Hz with smooth specimens and specimens containing a small artificial hole. Hydrogen charging of the specimens was carried out by the hydrogen gas exposure method or the aqueous solution immersion method. The fatigue life of the hydroged charged specimens decreased in comparison with the uncharged specimens. The cluster of Al2O3 inclusions with the length of about 270 μm was at the fracture origins of smooth specimens. For the specimens containing a small artificial hole, it was observed an acceleration of fatigue crack growth rate for the hydrogen charged specimens when compared to the uncharged ones. However, it was verified that this acceleration rate has reached an upper limit, which was approximately 10 times the acceleration rate found for uncharged specimens. Considering this upper limit value of the acceleration of fatigue crack growth rate, the √area parameter model was applied to predict the fatigue strength of uncharged and hydrogen charged specimens.
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U2 - 10.1299/kikaia.76.918
DO - 10.1299/kikaia.76.918
M3 - Article
AN - SCOPUS:77957315203
SN - 0387-5008
VL - 76
SP - 918
EP - 927
JO - Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
JF - Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
IS - 767
ER -