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

Atsushi Hosoi; Tomoya Kishi; Yang Ju

doi:10.3390/ma6094213

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

Atsushi Hosoi, Tomoya Kishi, Yang Ju^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

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.

Original language	English
Pages (from-to)	4213-4225
Number of pages	13
Journal	Materials
Volume	6
Issue number	9
DOIs	https://doi.org/10.3390/ma6094213
Publication status	Published - 2013 Sept
Externally published	Yes

Keywords

Coating
Crack
Electropulsing
Fatigue
Healing
Propagation

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

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10.3390/ma6094213

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

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 = "Coating, Crack, Electropulsing, Fatigue, Healing, Propagation",

author = "Atsushi Hosoi and Tomoya Kishi and Yang Ju",

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AU - Kishi, Tomoya

AU - Ju, Yang

N1 - Funding Information: This work was supported by the Japan Society for the Promotion of Science under Grant-in-Aid for Young Scientists (A) 23686021. Publisher Copyright: © 2013 by the authors; licensee MDPI, Basel, Switzerland.

PY - 2013/9

Y1 - 2013/9

N2 - 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.

AB - 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.

KW - Coating

KW - Crack

KW - Electropulsing

KW - Fatigue

KW - Healing

KW - Propagation

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

Abstract

Keywords

ASJC Scopus subject areas

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