TY - JOUR
T1 - Defect tolerance and hydrogen susceptibility of the fatigue limit of an additively manufactured Ni-based superalloy 718
AU - Kevinsanny,
AU - Okazaki, Saburo
AU - Takakuwa, Osamu
AU - Ogawa, Yuhei
AU - Funakoshi, Yusuke
AU - Kawashima, Hideto
AU - Matsuoka, Saburo
AU - Matsunaga, Hisao
N1 - Funding Information:
This study was performed as a part of a collaborative research project between the Japan Aerospace Exploration Agency (JAXA) and Kyushu University.
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/10
Y1 - 2020/10
N2 - The sensitivity of the fatigue limit of an additively manufactured, Ni-based superalloy 718 sample to surface finishing conditions and solute hydrogen was investigated via a series of tension–compression fatigue tests. The results revealed that neither defects nor hydrogen diminished the fatigue limit of the sample. The high defect tolerance of this material is attributed to a large unit of crack initiation in the coarse grain, which eclipses the detrimental effect of AM-process-induced defects. Also, from the results, it is inferred that hydrogen has little effect on the crack propagation rate and the crack growth threshold of the material.
AB - The sensitivity of the fatigue limit of an additively manufactured, Ni-based superalloy 718 sample to surface finishing conditions and solute hydrogen was investigated via a series of tension–compression fatigue tests. The results revealed that neither defects nor hydrogen diminished the fatigue limit of the sample. The high defect tolerance of this material is attributed to a large unit of crack initiation in the coarse grain, which eclipses the detrimental effect of AM-process-induced defects. Also, from the results, it is inferred that hydrogen has little effect on the crack propagation rate and the crack growth threshold of the material.
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U2 - 10.1016/j.ijfatigue.2020.105740
DO - 10.1016/j.ijfatigue.2020.105740
M3 - Article
AN - SCOPUS:85086142882
SN - 0142-1123
VL - 139
JO - International Journal of Fatigue
JF - International Journal of Fatigue
M1 - 105740
ER -