TY - GEN
T1 - Influences of plasticity-induced crack closure on fatigue crack healing of carbon steel with heat treatment
AU - Hamada, Eiichi
AU - Furuya, Yuto
AU - Hosoi, Atsushi
AU - Morita, Yuji
AU - Kawada, Hiroyuki
N1 - Funding Information:
This work was supported by JSPS KAKENHI Grant Number 15K05694.
Publisher Copyright:
Copyright © 2018 ASME
PY - 2018
Y1 - 2018
N2 - Healing technology for metallic materials is an important subject in terms of long-term reliability and durability of structural members, a healing technology to heal fatigue crack by applying heat treatment at annealing temperature level has been discovered. In this study, the influences of plasticity-induced crack closure on healing were evaluated by obtaining the crack opening load during the pre-crack introduction and evaluating the fatigue crack propagation characteristics before and after the healing heat treatment, using compact tension specimens made of carbon steel with different test conditions. As a result, the specimen with high crack opening load showed high healing effect and were able to heal up to 95% of the pre-crack length. This suggested that the residual compressive stress due to the plasticity-induced crack closure accelerates the solid-state diffusion bonding during the crack healing process and this leads to the improvement of the healing effect.
AB - Healing technology for metallic materials is an important subject in terms of long-term reliability and durability of structural members, a healing technology to heal fatigue crack by applying heat treatment at annealing temperature level has been discovered. In this study, the influences of plasticity-induced crack closure on healing were evaluated by obtaining the crack opening load during the pre-crack introduction and evaluating the fatigue crack propagation characteristics before and after the healing heat treatment, using compact tension specimens made of carbon steel with different test conditions. As a result, the specimen with high crack opening load showed high healing effect and were able to heal up to 95% of the pre-crack length. This suggested that the residual compressive stress due to the plasticity-induced crack closure accelerates the solid-state diffusion bonding during the crack healing process and this leads to the improvement of the healing effect.
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U2 - 10.1115/IMECE2018-86650
DO - 10.1115/IMECE2018-86650
M3 - Conference contribution
AN - SCOPUS:85060400989
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
BT - Materials
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 2018 International Mechanical Engineering Congress and Exposition, IMECE 2018
Y2 - 9 November 2018 through 15 November 2018
ER -