Study of Microstructure and Wear Behavior of T6 Heat Treated as Cast Al-25Mg2Si-2Cu Alloy

D.G. Sondur; D.M. Goudar; D.G. Mallapur; G.B. Rudrakshi

doi:10.4028/www.scientific.net/MSF.830-831.358

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HomeMaterials Science ForumMaterials Science Forum Vols. 830-831Study of Microstructure and Wear Behavior of T6...

Study of Microstructure and Wear Behavior of T6 Heat Treated as Cast Al-25Mg₂Si-2Cu Alloy

Abstract:

In the present investigation, microstructural characteristics and dry sliding wear behaviour of T6 heat treated conventionally cast Al-25Mg₂Si-2Cu alloy have been discussed. The as cast alloy was subjected to solutionizing at 500°C for 5h and isothermal aging treatment at 190°C for different aging times. The micro structural characterization was studied using Scanning Electron Microscope with EDS analysis. The microstructure of as cast alloy consists of intermetallics of coarse block like sharp edged β-(Mg₂Si), θ-(Al₂Cu) and Q-(Al-Mg-Cu-Si) in the form of Chinese scripts and needles distributed randomly in the Al-matrix. The microstructure of heat treated alloy shows spheroidization of β phase and fine precipitation of θ-(Al₂Cu) and Q phases. The dry sliding wear test was carried out using pin-on-disc machine. Age hardened alloy exhibits high wear resistance and minimum coefficient of friction over the entire range of applied loads and sliding velocities. Furthermore, high wear resistance was observed in the under aged condition compared to over ageing conditions.

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Periodical:

Materials Science Forum (Volumes 830-831)

Pages:

358-361

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.830-831.358

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Online since:

September 2015

Authors:

D.G. Sondur*, D.M. Goudar, D.G. Mallapur, G.B. Rudrakshi

Keywords:

Al Alloys, Intermetallics, T6 Heat Treatment, Wear Resistance

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