Date of Award

2016

Degree Type

Thesis

Degree Name

M.A.Sc.

Department

Mechanical, Automotive, and Materials Engineering

First Advisor

Alpas, Ahmet

Keywords

Aluminum alloy, Elevated temperatures, Friction, Plastic deformation

Rights

CC BY-NC-ND 4.0

Abstract

This study examines the tribological behaviour of AA6061 alloy sheets at elevated temperatures including a study of the deformation mechanisms and their effects on friction behaviour. The role of the atmosphere is given particular importance when studying the surface morphology and that developed during high temperature deformation. Friction tests were performed with an operating temperature range of 350 to 545°C, using strain rates between 1x10-2 and 4x10-2s-1. The measured COF in argon was higher than that in air due to the absence of fresh oxide layer formed inside the sliding track. Junction strength tests were performed in air and argon for the AA6061 alloy. The junction strength of AA6061 in argon was higher than that measured in air as no oxide layer formed on the surface of alloy.

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