Developing a steady state wear equation for AA7050 hybrid composites/steel interface at elevated temperature

Title

Developing a steady state wear equation for AA7050 hybrid composites/steel interface at elevated temperature

Creator

T K N.; Jangam S.

Description

In this research work, an attempt was made to reinforce AA7050/5Gr composites with multi-walled carbon nanotube (MWCNT) of varying weight percentages processed through stir casting route. SEM with EDS mapping revealed that the particles were uniformly distributed over the composites. Hardness reduces with increasing MWCNT weight percentage owing to the inverse hall petch effect and increment in void content. A third-body abrasion, which happens when the CNT in the aluminium matrix material detaches from the surface and erodes material from the composites pin as well as the counter face, causes the wear resistance to rise with the addition of CNT particles. A mechanically mixed layer, which avoids direct metal-to-metal contact and thus increases wear resistance, was created at the abraded surface and at high temperature, where the reduction of wear rate was due to the development of oxide protective layer. A steady-state wear equation for the contacting surface at high temperature (R = 1/Y ?(ln W/2X)) for AA7050 hybrid compositessteel interface was developed. The enhancement in wear resistance was directly proportional to the proportion of ferrous content present on the surface, which was confirmed on the elemental analysis. Pock marks, micropits, craters and cracks were the features observed on the worn surface morphology, whereas delamination and plasticisation were the observed modes of wear mechanism. 2023 Informa UK Limited, trading as Taylor & Francis Group.

Source

Advances in Materials and Processing Technologies, Vol-10, No. 4, pp. 3546-3561.

Date

2024-01-01

Publisher

Taylor and Francis Ltd.

Subject

carbon nanotubes; hardness; High-temperature tribology; wear equation; worn surface morphology

Coverage

T K N., Research Scholar, Department of Mechanical and Automobile Engineering, School of Engineering and Technology, CHRIST (Deemed to Be University), Karnataka, Bangalore, India; Jangam S., Department of Mechanical and Automobile Engineering, School of Engineering and Technology, CHRIST(Deemed to Be University), Karnataka, Bangalore, India

Rights

Restricted Access

Relation

ISSN: 2374068X

Format

Online

Language

English

Type

Article

Identifier

https://doi.org/10.1080/2374068X.2023.2253396

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