TY - JOUR
T1 - Microscopic observation of the mechanism for brittle striation formation in low carbon steel fatigued in hydrogen gas TEM and EBSD observations corresponding to fractography
AU - Nishikawa, Hide Aki
AU - Oda, Yasuji
AU - Takahashi, Yoshimasa
AU - Noguchi, Hiroshi
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2010/10
Y1 - 2010/10
N2 - In order to investigate the brittle-striation formation mechanism of low carbon steel JIS S10C in hydrogen gas environment, TEM/EBSD observations corresponding to fractography were conducted. Main results are as follows. (1) Quasi-cleavage (QC) facets plane with brittle striations does not coincides with (100) cleavage plane. (2) Slip deformation distributions reflecting the brittle striation formation processes are observed with TEM. One of the conceivable brittle-striation formation mechanisms which can explain these results is as follows. A striation line is formed during the loading part of the cycle as a trace of blunting by slip. Then, stable ductile crack growth starts. These processes were similar to those in the normal ductile fracture from a crack, that is, ductile tearing process in tension.
AB - In order to investigate the brittle-striation formation mechanism of low carbon steel JIS S10C in hydrogen gas environment, TEM/EBSD observations corresponding to fractography were conducted. Main results are as follows. (1) Quasi-cleavage (QC) facets plane with brittle striations does not coincides with (100) cleavage plane. (2) Slip deformation distributions reflecting the brittle striation formation processes are observed with TEM. One of the conceivable brittle-striation formation mechanisms which can explain these results is as follows. A striation line is formed during the loading part of the cycle as a trace of blunting by slip. Then, stable ductile crack growth starts. These processes were similar to those in the normal ductile fracture from a crack, that is, ductile tearing process in tension.
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U2 - 10.1299/kikaia.76.1335
DO - 10.1299/kikaia.76.1335
M3 - Article
AN - SCOPUS:78651414855
VL - 76
SP - 1335
EP - 1342
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
SN - 0387-5008
IS - 770
ER -