TY - JOUR
T1 - Effect of Hydrogen on Fatigue Limit of SCM435 Low-Alloy Steel
AU - Kubota, Masanobu
AU - Fukuda, Mio
AU - Komoda, Ryosuke
N1 - Funding Information:
This study was supported by the oW rld Premier International esearR ch enC ter Initiative (PI)W , MEXT, apJ an. The International Institute for arC bon -Neutral Energy esearR ch (PIW -I2NEC )R is supported by the oW rld Premier International esearR ch enC ter Initiative (PI)W , MEXT, apJ an.
Publisher Copyright:
© 2019 The Authors. Published by Elsevier B.V.
PY - 2019
Y1 - 2019
N2 - The objective of this study is to gain a basic understanding of the effect of hydrogen on the fatigue limit. The material was a low-alloy steel modified to be sensitive to hydrogen embrittlement by heat treatment. A statistical fatigue test was carried out using smooth and deep-notched specimens at a loading frequency of 20 Hz. The environment was laboratory air and hydrogen gas. The hydrogen gas pressure was 0.1 MPa in gauge pressure. The fatigue limit of the smooth specimen was higher in the hydrogen gas than that in air, although the material showed severe hydrogen embrittlement during the SSRT (Slow Strain Rate Test). The fatigue limit of the deep-notched specimen in the hydrogen gas was the same as that in air. For the smooth specimen, the fatigue limit was determined by whether or not a crack was initiated. For the deep-notched specimen, the fatigue limit was determined by whether or not a crack propagated. The results can be interpreted as that hydrogen has no significant effect on crack initiation in the high-cycle fatigue regime and affected the threshold of the crack propagation.
AB - The objective of this study is to gain a basic understanding of the effect of hydrogen on the fatigue limit. The material was a low-alloy steel modified to be sensitive to hydrogen embrittlement by heat treatment. A statistical fatigue test was carried out using smooth and deep-notched specimens at a loading frequency of 20 Hz. The environment was laboratory air and hydrogen gas. The hydrogen gas pressure was 0.1 MPa in gauge pressure. The fatigue limit of the smooth specimen was higher in the hydrogen gas than that in air, although the material showed severe hydrogen embrittlement during the SSRT (Slow Strain Rate Test). The fatigue limit of the deep-notched specimen in the hydrogen gas was the same as that in air. For the smooth specimen, the fatigue limit was determined by whether or not a crack was initiated. For the deep-notched specimen, the fatigue limit was determined by whether or not a crack propagated. The results can be interpreted as that hydrogen has no significant effect on crack initiation in the high-cycle fatigue regime and affected the threshold of the crack propagation.
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U2 - 10.1016/j.prostr.2019.12.056
DO - 10.1016/j.prostr.2019.12.056
M3 - Conference article
AN - SCOPUS:85081612366
SN - 2452-3216
VL - 19
SP - 520
EP - 527
JO - Procedia Structural Integrity
JF - Procedia Structural Integrity
T2 - Fatigue Design 2019 - 8th edition of the International Conference on Fatigue Design
Y2 - 20 November 2019 through 21 November 2019
ER -