The Influence of Ageing Time and Temperature on the Structure and Properties of Heat Treated A201.0 Aluminum Alloy
Mohammad Sharear Kabir1, Tamzid Ibn Minhaj2, Ehsan Ahmed Ashrafi3, Md Moinul Islam4

1Mohammad Sharear Kabir, Department of Materials and Metallurgical Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh.
2Tamzid Ibn Minhaj, Department of Materials and Metallurgical Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh.
3Ehsan Ahmed Ashrafi, Department of Materials and Metallurgical Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh.
4Md Moinul Islam, Department of Materials and Metallurgical Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh.

Manuscript received on 20 July 2014 | Revised Manuscript received on 25 July 2014 | Manuscript published on 30 July 2014 | PP: 78-83 | Volume-3 Issue-3, July 2014 | Retrieval Number: C1150073314/2014©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: The effect of ageing time and temperature following quenching from solution treatment at 540±2OC on the micro structure and properties of A201.0 Al alloy was studied. Using thermodynamic modeling with JMatPro, the intermetallic phases that exist at the end of solification was determined. Intermetallic phases like CuAl2, Al2CuMg and Mg-Si phase contribute to the hardness of the alloy. Ageing was carried out upto a maximum duration of 10000 hours at a constant temperature of 170±2OC. As ageing time increased, the hardness of the alloy increased due to the enhanced presence of Guinier-Preston (GP) zones which are coherent with the alloy matrix. With further ageing (overageing) the hardness of the alloy decreases as the precipitate loses its coherency with the alloy matrix.
Keywords: A201.0 Al alloy, Solution treatment, Thermodynamic modeling, Ageing, Guinier-Preston (GP) zones, overageing

Scope of the Article: Heat Transfer