Influences of plasticity-induced crack closure on fatigue crack healing of carbon steel with heat treatment

Eiichi Hamada, Yuto Furuya, Atsushi Hosoi, Yuji Morita, Hiroyuki Kawada

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationMaterials
Subtitle of host publicationGenetics to Structures
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791852170
DOIs
Publication statusPublished - 2018
EventASME 2018 International Mechanical Engineering Congress and Exposition, IMECE 2018 - Pittsburgh, United States
Duration: 2018 Nov 92018 Nov 15

Publication series

NameASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
Volume12

Other

OtherASME 2018 International Mechanical Engineering Congress and Exposition, IMECE 2018
CountryUnited States
CityPittsburgh
Period18/11/918/11/15

ASJC Scopus subject areas

  • Mechanical Engineering

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