Mechanical properties and dry sliding wear behaviour of Al–Si–Mg alloy by equal channel angular pressing

Nur Farah Bazilah Wakhi Anuar; Mohd Shukor Salleh; Mohd Zaidi Omar; Saifudin Hafiz Yahaya; Nur Farah Bazilah Wakhi Anuar; Mohd Shukor Salleh; Mohd Zaidi Omar; Saifudin Hafiz Yahaya

doi:10.3934/matersci.2022045

AIMS Materials Science

2022, Volume 9, Issue 5: 733-749. doi: 10.3934/matersci.2022045

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Mechanical properties and dry sliding wear behaviour of Al–Si–Mg alloy by equal channel angular pressing

1.
Faculty of Mechanical and Manufacturing Engineering Technology, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, Durian Tunggal Melaka, 76100 Melaka, Malaysia
2.
Faculty of Manufacturing Engineering, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, Durian Tunggal Melaka, 76100 Melaka, Malaysia
3.
Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, UKM Bangi, 43600 Selangor, Malaysia

Received: 05 July 2022 Revised: 23 August 2022 Accepted: 04 September 2022 Published: 29 September 2022

This study investigated the microstructure, hardness, tensile and tribological behaviour of a cooling slope Al–Si–Mg alloy following ECAP and T6 heat treatment. The optical and scanning electron microscopes were applied to investigate the microstructure of the as-cast material and heat-treated ECAPed Al–Si–Mg alloy. The dry sliding wear test was tested with three different loads of 10 N, 50 N, and 100 N with constant sliding speed and sliding distance at 1.0 m/s and 9000 m, respectively, using the pin-on-disc tribometer. The hardness and tensile properties were evaluated through microhardness, UTS, and YS measurement for the as-cast Al–Si–Mg alloy, both heat-treated with and without ECAPed alloys. Moreover, wear rate and COF in the Al–Si–Mg alloy with different loads were analysed and linked with microstructural and strength behaviour after the ECAP process. Meanwhile, these analyses of results were correlated with the behaviour of the as-cast Al–Si–Mg aluminium alloy and heat-treated non-ECAPed alloy. Results demonstrated that a combination of ECAP processing and T6 heat treatment improves the mechanical behaviour, while the COF and wear rate are improved at a load of 100 N.
- aluminium alloys,
- equal channel angular pressing,
- microstructure,
- mechanical properties,
- dry sliding wear,
- worn surface
Citation: Nur Farah Bazilah Wakhi Anuar, Mohd Shukor Salleh, Mohd Zaidi Omar, Saifudin Hafiz Yahaya. Mechanical properties and dry sliding wear behaviour of Al–Si–Mg alloy by equal channel angular pressing[J]. AIMS Materials Science, 2022, 9(5): 733-749. doi: 10.3934/matersci.2022045

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Abstract

This study investigated the microstructure, hardness, tensile and tribological behaviour of a cooling slope Al–Si–Mg alloy following ECAP and T6 heat treatment. The optical and scanning electron microscopes were applied to investigate the microstructure of the as-cast material and heat-treated ECAPed Al–Si–Mg alloy. The dry sliding wear test was tested with three different loads of 10 N, 50 N, and 100 N with constant sliding speed and sliding distance at 1.0 m/s and 9000 m, respectively, using the pin-on-disc tribometer. The hardness and tensile properties were evaluated through microhardness, UTS, and YS measurement for the as-cast Al–Si–Mg alloy, both heat-treated with and without ECAPed alloys. Moreover, wear rate and COF in the Al–Si–Mg alloy with different loads were analysed and linked with microstructural and strength behaviour after the ECAP process. Meanwhile, these analyses of results were correlated with the behaviour of the as-cast Al–Si–Mg aluminium alloy and heat-treated non-ECAPed alloy. Results demonstrated that a combination of ECAP processing and T6 heat treatment improves the mechanical behaviour, while the COF and wear rate are improved at a load of 100 N.

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