Surface characteristics underpinning fretting wear performance of heavily loaded duplex chameleon/PEO coatings on Al

Mengyu Lin; Aneta Nemcova; Andrey A. Voevodin; Andras Korenyi-both; Tomasz W. Liskiewicz; Nicolas Laugel; Allan Matthews; Aleksey Yerokhin

Surface characteristics underpinning fretting wear performance of heavily loaded duplex chameleon/PEO coatings on Al

Mengyu Lin, Aneta Nemcova, Andrey A. Voevodin, Andras Korenyi-both, Tomasz W. Liskiewicz, Nicolas Laugel, Allan Matthews, Aleksey Yerokhin

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

Abstract

Duplex coatings comprising MoS2/Sb2O3/graphite layer burnished on top of plasma electrolytically oxidised AA6082 alloy enhanced fretting wear resistance against alumina and steel whilst reducing friction from 0.6…0.9 to 0.08…0.1 in dry nitrogen and humid air. Transitions to stick-slip (~3 m), partial slip (5-10 m) and gross slip (>10 m) showed an order of magnitude improvements over single-layer PEO coatings. In the latter mode, high initial contact pressures (1.1 GPa) with steel counterpart under oxidising atmosphere increased friction due to generation of Fe/Al/Cr oxides/hydroxides in the contact region, leading micro-cracking in PEO coating followed by fatigue damage of aluminium substrate. Reducing contact pressure <1 GPa, retained topcoat lubricating behaviour, high wear resistance and eliminated fatigue damage after 104 cycles.

Original language	English
Journal	Tribology International
Publication status	Accepted/In press - 10 Oct 2020

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title = "Surface characteristics underpinning fretting wear performance of heavily loaded duplex chameleon/PEO coatings on Al",

abstract = "Duplex coatings comprising MoS2/Sb2O3/graphite layer burnished on top of plasma electrolytically oxidised AA6082 alloy enhanced fretting wear resistance against alumina and steel whilst reducing friction from 0.6…0.9 to 0.08…0.1 in dry nitrogen and humid air. Transitions to stick-slip (~3 m), partial slip (5-10 m) and gross slip (>10 m) showed an order of magnitude improvements over single-layer PEO coatings. In the latter mode, high initial contact pressures (1.1 GPa) with steel counterpart under oxidising atmosphere increased friction due to generation of Fe/Al/Cr oxides/hydroxides in the contact region, leading micro-cracking in PEO coating followed by fatigue damage of aluminium substrate. Reducing contact pressure <1 GPa, retained topcoat lubricating behaviour, high wear resistance and eliminated fatigue damage after 104 cycles.",

author = "Mengyu Lin and Aneta Nemcova and Voevodin, {Andrey A.} and Andras Korenyi-both and Liskiewicz, {Tomasz W.} and Nicolas Laugel and Allan Matthews and Aleksey Yerokhin",

year = "2020",

month = oct,

day = "10",

language = "English",

journal = "Tribology International",

issn = "0301-679X",

publisher = "Elsevier BV",

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TY - JOUR

T1 - Surface characteristics underpinning fretting wear performance of heavily loaded duplex chameleon/PEO coatings on Al

AU - Lin, Mengyu

AU - Nemcova, Aneta

AU - Voevodin, Andrey A.

AU - Korenyi-both, Andras

AU - Liskiewicz, Tomasz W.

AU - Laugel, Nicolas

AU - Matthews, Allan

AU - Yerokhin, Aleksey

PY - 2020/10/10

Y1 - 2020/10/10

N2 - Duplex coatings comprising MoS2/Sb2O3/graphite layer burnished on top of plasma electrolytically oxidised AA6082 alloy enhanced fretting wear resistance against alumina and steel whilst reducing friction from 0.6…0.9 to 0.08…0.1 in dry nitrogen and humid air. Transitions to stick-slip (~3 m), partial slip (5-10 m) and gross slip (>10 m) showed an order of magnitude improvements over single-layer PEO coatings. In the latter mode, high initial contact pressures (1.1 GPa) with steel counterpart under oxidising atmosphere increased friction due to generation of Fe/Al/Cr oxides/hydroxides in the contact region, leading micro-cracking in PEO coating followed by fatigue damage of aluminium substrate. Reducing contact pressure <1 GPa, retained topcoat lubricating behaviour, high wear resistance and eliminated fatigue damage after 104 cycles.

AB - Duplex coatings comprising MoS2/Sb2O3/graphite layer burnished on top of plasma electrolytically oxidised AA6082 alloy enhanced fretting wear resistance against alumina and steel whilst reducing friction from 0.6…0.9 to 0.08…0.1 in dry nitrogen and humid air. Transitions to stick-slip (~3 m), partial slip (5-10 m) and gross slip (>10 m) showed an order of magnitude improvements over single-layer PEO coatings. In the latter mode, high initial contact pressures (1.1 GPa) with steel counterpart under oxidising atmosphere increased friction due to generation of Fe/Al/Cr oxides/hydroxides in the contact region, leading micro-cracking in PEO coating followed by fatigue damage of aluminium substrate. Reducing contact pressure <1 GPa, retained topcoat lubricating behaviour, high wear resistance and eliminated fatigue damage after 104 cycles.

M3 - Article

SN - 0301-679X

JO - Tribology International

JF - Tribology International

ER -

Surface characteristics underpinning fretting wear performance of heavily loaded duplex chameleon/PEO coatings on Al

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