Effect of grain size on the electrical failure of copper contacts in fretting motion

H. J. Noh; J. W. Kim; S. M. Lee; H. Jang

doi:10.1016/j.triboint.2017.02.043

Effect of grain size on the electrical failure of copper contacts in fretting motion

H. J. Noh, J. W. Kim, S. M. Lee, H. Jang

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

26 Citations (Scopus)

Abstract

The influence of grain size on degradation of electrical contacts during fretting wear was investigated. Copper polycrystals with grain sizes of 2–162 µm were used to examine friction, wear, and electrical contact resistance. The results showed that the electrical contact failure was caused by the compact oxide layer produced at the contact junction. Copper specimens with smaller grains had a longer lifecycle because of grain-size strengthening. However, this strengthening effect was limited to a critical grain size and, with further increase in grain size, plastic deformation underneath the contact surface played a major role in delaying the contact failure caused by oxide formation on the fretting surface.

Original language	English
Pages (from-to)	39-45
Number of pages	7
Journal	Tribology International
Volume	111
DOIs	https://doi.org/10.1016/j.triboint.2017.02.043
Publication status	Published - 2017

Bibliographical note

Publisher Copyright:
© 2017 Elsevier Ltd

Keywords

Electrical contacts
Fretting corrosion
Fretting wear
Grain size

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Surfaces and Interfaces
Surfaces, Coatings and Films

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10.1016/j.triboint.2017.02.043

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title = "Effect of grain size on the electrical failure of copper contacts in fretting motion",

abstract = "The influence of grain size on degradation of electrical contacts during fretting wear was investigated. Copper polycrystals with grain sizes of 2–162 µm were used to examine friction, wear, and electrical contact resistance. The results showed that the electrical contact failure was caused by the compact oxide layer produced at the contact junction. Copper specimens with smaller grains had a longer lifecycle because of grain-size strengthening. However, this strengthening effect was limited to a critical grain size and, with further increase in grain size, plastic deformation underneath the contact surface played a major role in delaying the contact failure caused by oxide formation on the fretting surface.",

keywords = "Electrical contacts, Fretting corrosion, Fretting wear, Grain size",

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year = "2017",

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language = "English",

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journal = "Tribology International",

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AU - Noh, H. J.

AU - Kim, J. W.

AU - Lee, S. M.

AU - Jang, H.

PY - 2017

Y1 - 2017

N2 - The influence of grain size on degradation of electrical contacts during fretting wear was investigated. Copper polycrystals with grain sizes of 2–162 µm were used to examine friction, wear, and electrical contact resistance. The results showed that the electrical contact failure was caused by the compact oxide layer produced at the contact junction. Copper specimens with smaller grains had a longer lifecycle because of grain-size strengthening. However, this strengthening effect was limited to a critical grain size and, with further increase in grain size, plastic deformation underneath the contact surface played a major role in delaying the contact failure caused by oxide formation on the fretting surface.

AB - The influence of grain size on degradation of electrical contacts during fretting wear was investigated. Copper polycrystals with grain sizes of 2–162 µm were used to examine friction, wear, and electrical contact resistance. The results showed that the electrical contact failure was caused by the compact oxide layer produced at the contact junction. Copper specimens with smaller grains had a longer lifecycle because of grain-size strengthening. However, this strengthening effect was limited to a critical grain size and, with further increase in grain size, plastic deformation underneath the contact surface played a major role in delaying the contact failure caused by oxide formation on the fretting surface.

KW - Electrical contacts

KW - Fretting corrosion

KW - Fretting wear

KW - Grain size

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DO - 10.1016/j.triboint.2017.02.043

M3 - Article

AN - SCOPUS:85014363440

SN - 0301-679X

VL - 111

SP - 39

EP - 45

JO - Tribology International

JF - Tribology International

ER -

Effect of grain size on the electrical failure of copper contacts in fretting motion

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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