Characterization of cracks formed in large flat-on-flat fretting contact

Janne Juoksukangas; Verner Nurmi; Jouko Hintikka; Minnamari Vippola; Arto Lehtovaara; Antti Mäntylä; Joona Vaara; Tero Frondelius

doi:10.1016/j.ijfatigue.2019.03.004

Characterization of cracks formed in large flat-on-flat fretting contact

Janne Juoksukangas, Verner Nurmi, Jouko Hintikka, Minnamari Vippola, Arto Lehtovaara, Antti Mäntylä, Joona Vaara, Tero Frondelius

Materials Science and Environmental Engineering

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

9 Citations (Scopus)

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Abstract

Fretting fatigue may lead to severe damage in machines. Adhesive material transfer spots in millimeter scale have previously been observed on fretted surfaces, which have been related to cracking. In this study, fretting-induced cracks formed in a large annular flat-on-flat contact are characterized. Optical and scanning electron microscopy of the fretting scar cross-section samples of self-mated quenched and tempered steel specimens revealed severe cracking and deformed microstructure. Two major cracks typically formed around an adhesion spot, which propagated at an oblique angle, regardless of the test parameters used. Millimeter-scale cracks were observed already within a few thousand loading cycles.

Original language	English
Pages (from-to)	361-370
Number of pages	10
Journal	International Journal of Fatigue
Volume	124
DOIs	https://doi.org/10.1016/j.ijfatigue.2019.03.004
Publication status	Published - Jul 2019
Publication type	A1 Journal article-refereed

Keywords

Crack formation
Cracks
Damage
Fretting fatigue
Microscopy

Publication forum classification

Publication forum level 2

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering
Surfaces, Coatings and Films
Surfaces and Interfaces

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10.1016/j.ijfatigue.2019.03.004Licence: CC BY

1-s2.0-S0142112319300842-main
© 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/).
Final published version, 17.4 MBLicence: CC BY

http://urn.fi/URN:NBN:fi:tuni-201909273552Licence: CC BY

Cite this

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title = "Characterization of cracks formed in large flat-on-flat fretting contact",

abstract = "Fretting fatigue may lead to severe damage in machines. Adhesive material transfer spots in millimeter scale have previously been observed on fretted surfaces, which have been related to cracking. In this study, fretting-induced cracks formed in a large annular flat-on-flat contact are characterized. Optical and scanning electron microscopy of the fretting scar cross-section samples of self-mated quenched and tempered steel specimens revealed severe cracking and deformed microstructure. Two major cracks typically formed around an adhesion spot, which propagated at an oblique angle, regardless of the test parameters used. Millimeter-scale cracks were observed already within a few thousand loading cycles.",

keywords = "Crack formation, Cracks, Damage, Fretting fatigue, Microscopy",

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AU - Juoksukangas, Janne

AU - Nurmi, Verner

AU - Hintikka, Jouko

AU - Vippola, Minnamari

AU - Lehtovaara, Arto

AU - Mäntylä, Antti

AU - Vaara, Joona

AU - Frondelius, Tero

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N2 - Fretting fatigue may lead to severe damage in machines. Adhesive material transfer spots in millimeter scale have previously been observed on fretted surfaces, which have been related to cracking. In this study, fretting-induced cracks formed in a large annular flat-on-flat contact are characterized. Optical and scanning electron microscopy of the fretting scar cross-section samples of self-mated quenched and tempered steel specimens revealed severe cracking and deformed microstructure. Two major cracks typically formed around an adhesion spot, which propagated at an oblique angle, regardless of the test parameters used. Millimeter-scale cracks were observed already within a few thousand loading cycles.

AB - Fretting fatigue may lead to severe damage in machines. Adhesive material transfer spots in millimeter scale have previously been observed on fretted surfaces, which have been related to cracking. In this study, fretting-induced cracks formed in a large annular flat-on-flat contact are characterized. Optical and scanning electron microscopy of the fretting scar cross-section samples of self-mated quenched and tempered steel specimens revealed severe cracking and deformed microstructure. Two major cracks typically formed around an adhesion spot, which propagated at an oblique angle, regardless of the test parameters used. Millimeter-scale cracks were observed already within a few thousand loading cycles.

KW - Crack formation

KW - Cracks

KW - Damage

KW - Fretting fatigue

KW - Microscopy

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JO - International Journal of Fatigue

JF - International Journal of Fatigue

ER -

Characterization of cracks formed in large flat-on-flat fretting contact

Abstract

Keywords

Publication forum classification

ASJC Scopus subject areas

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