Next Article in Journal
Unified Formulation for a Triaxial Elastoplastic Constitutive Law for Concrete
Previous Article in Journal
Preparation and Morphology Studies of Nano Zinc Oxide Obtained Using Native and Modified Chitosans
Materials 2013, 6(9), 4213-4225; doi:10.3390/ma6094213
Article

Healing of Fatigue Crack by High-Density Electropulsing in Austenitic Stainless Steel Treated with the Surface-Activated Pre-Coating

,
 and
*
Department of Mechanical Science and Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
* Author to whom correspondence should be addressed.
Received: 22 August 2013 / Revised: 14 September 2013 / Accepted: 16 September 2013 / Published: 23 September 2013
View Full-Text   |   Download PDF [858 KB, uploaded 23 September 2013]   |  

Abstract

A technique to heal a fatigue crack in austenitic stainless steel SUS316 by applying a controlled, high-density pulsed current was developed. A surface-activated pre-coating (SAPC), which eliminates the oxide layer and coats a Ni film on the crack surface, was used to improve the adhesion between crack surfaces. Cracks were observed by scanning electron microscopy before and after the application of high-density electropulsing. To evaluate the healing effect of the SAPC during crack propagation, fatigue tests were conducted under a constant stress intensity factor. The fatigue crack treated with the SAPC was found to be effectively healed as a result of electropulsing, and also showed a slower rate of crack propagation.
Keywords: healing; crack; fatigue; electropulsing; propagation; coating healing; crack; fatigue; electropulsing; propagation; coating
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
SciFeed

Share & Cite This Article

Further Mendeley | CiteULike
Export to BibTeX |
EndNote |
RIS
MDPI and ACS Style

Hosoi, A.; Kishi, T.; Ju, Y. Healing of Fatigue Crack by High-Density Electropulsing in Austenitic Stainless Steel Treated with the Surface-Activated Pre-Coating. Materials 2013, 6, 4213-4225.

View more citation formats

Related Articles

Article Metrics

For more information on the journal, click here

Comments

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert