Structure-property relationships in a CoCrMo alloy at micro and nano-scales

R. Ahmed; H. L. de Villiers Lovelock; N. H. Faisal; S. Davies

doi:10.1016/j.triboint.2014.06.015

Structure-property relationships in a CoCrMo alloy at micro and nano-scales

R. Ahmed^*, H. L. de Villiers Lovelock, N. H. Faisal, S. Davies

^*Corresponding author for this work

School of Engineering & Physical Sciences

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

23 Citations (Scopus)

Abstract

This investigation considered the multiscale tribo-mechanical evaluations of CoCrMo (Stellite(R)21) alloys manufactured via two different processing routes of casting and HIP-consolidation from powder (Hot Isostatic Pressing). These involved hardness, nanoscratch, impact toughness, abrasive wear and sliding wear evaluations using pin-on-disc and ball-on-flat tests. HIPing improved the nanoscratch and ball-on-flat sliding wear performance due to higher hardness and work-hardening rate of the metal matrix. The cast alloy however exhibited superior abrasive wear and self-mated pin-on-disc wear performance. The tribological properties were more strongly influenced by the CoCr matrix, which is demonstrated in nanoscratch analysis. (C) 2014 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	98-114
Number of pages	17
Journal	Tribology International
Volume	80
DOIs	https://doi.org/10.1016/j.triboint.2014.06.015
Publication status	Published - Dec 2014

Keywords

Nanotribology
Nanoscratch
Wear
Manufacturing
CO-CR-MO
COBALT-BASE ALLOYS
STELLITE HARDFACING ALLOYS
MECHANICAL-PROPERTIES
TENSILE PROPERTIES
SURGICAL IMPLANTS
WEAR-RESISTANCE
HEAT-TREATMENT
ABRASIVE WEAR
MICROSTRUCTURE

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10.1016/j.triboint.2014.06.015

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@article{b955ef1c21a74f8eab7def92e0b6d6d1,

title = "Structure-property relationships in a CoCrMo alloy at micro and nano-scales",

abstract = "This investigation considered the multiscale tribo-mechanical evaluations of CoCrMo (Stellite(R)21) alloys manufactured via two different processing routes of casting and HIP-consolidation from powder (Hot Isostatic Pressing). These involved hardness, nanoscratch, impact toughness, abrasive wear and sliding wear evaluations using pin-on-disc and ball-on-flat tests. HIPing improved the nanoscratch and ball-on-flat sliding wear performance due to higher hardness and work-hardening rate of the metal matrix. The cast alloy however exhibited superior abrasive wear and self-mated pin-on-disc wear performance. The tribological properties were more strongly influenced by the CoCr matrix, which is demonstrated in nanoscratch analysis. (C) 2014 Elsevier Ltd. All rights reserved.",

keywords = "Nanotribology, Nanoscratch, Wear, Manufacturing, CO-CR-MO, COBALT-BASE ALLOYS, STELLITE HARDFACING ALLOYS, MECHANICAL-PROPERTIES, TENSILE PROPERTIES, SURGICAL IMPLANTS, WEAR-RESISTANCE, HEAT-TREATMENT, ABRASIVE WEAR, MICROSTRUCTURE",

author = "R. Ahmed and Lovelock, {H. L. de Villiers} and Faisal, {N. H.} and S. Davies",

year = "2014",

month = dec,

doi = "10.1016/j.triboint.2014.06.015",

language = "English",

volume = "80",

pages = "98--114",

journal = "Tribology International",

issn = "0301-679X",

publisher = "Elsevier",

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TY - JOUR

T1 - Structure-property relationships in a CoCrMo alloy at micro and nano-scales

AU - Ahmed, R.

AU - Lovelock, H. L. de Villiers

AU - Faisal, N. H.

AU - Davies, S.

PY - 2014/12

Y1 - 2014/12

N2 - This investigation considered the multiscale tribo-mechanical evaluations of CoCrMo (Stellite(R)21) alloys manufactured via two different processing routes of casting and HIP-consolidation from powder (Hot Isostatic Pressing). These involved hardness, nanoscratch, impact toughness, abrasive wear and sliding wear evaluations using pin-on-disc and ball-on-flat tests. HIPing improved the nanoscratch and ball-on-flat sliding wear performance due to higher hardness and work-hardening rate of the metal matrix. The cast alloy however exhibited superior abrasive wear and self-mated pin-on-disc wear performance. The tribological properties were more strongly influenced by the CoCr matrix, which is demonstrated in nanoscratch analysis. (C) 2014 Elsevier Ltd. All rights reserved.

AB - This investigation considered the multiscale tribo-mechanical evaluations of CoCrMo (Stellite(R)21) alloys manufactured via two different processing routes of casting and HIP-consolidation from powder (Hot Isostatic Pressing). These involved hardness, nanoscratch, impact toughness, abrasive wear and sliding wear evaluations using pin-on-disc and ball-on-flat tests. HIPing improved the nanoscratch and ball-on-flat sliding wear performance due to higher hardness and work-hardening rate of the metal matrix. The cast alloy however exhibited superior abrasive wear and self-mated pin-on-disc wear performance. The tribological properties were more strongly influenced by the CoCr matrix, which is demonstrated in nanoscratch analysis. (C) 2014 Elsevier Ltd. All rights reserved.

KW - Nanotribology

KW - Nanoscratch

KW - Wear

KW - Manufacturing

KW - CO-CR-MO

KW - COBALT-BASE ALLOYS

KW - STELLITE HARDFACING ALLOYS

KW - MECHANICAL-PROPERTIES

KW - TENSILE PROPERTIES

KW - SURGICAL IMPLANTS

KW - WEAR-RESISTANCE

KW - HEAT-TREATMENT

KW - ABRASIVE WEAR

KW - MICROSTRUCTURE

U2 - 10.1016/j.triboint.2014.06.015

DO - 10.1016/j.triboint.2014.06.015

M3 - Article

SN - 0301-679X

VL - 80

SP - 98

EP - 114

JO - Tribology International

JF - Tribology International

ER -

Structure-property relationships in a CoCrMo alloy at micro and nano-scales

Abstract

Keywords

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