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Influences of Plasticity-Induced Crack Closure on Fatigue Crack Healing of Carbon Steel With Heat Treatment
- Source :
- Volume 12: Materials: Genetics to Structures.
- Publication Year :
- 2018
- Publisher :
- American Society of Mechanical Engineers, 2018.
-
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.
Details
- Database :
- OpenAIRE
- Journal :
- Volume 12: Materials: Genetics to Structures
- Accession number :
- edsair.doi...........d6186cddd95c55e954d2eb33421f9012