Title: Microstructural features induced during compression of Al-18Si-2.5Cu-0.6Fe alloy at elevated temperature

Authors: Khemraj; A.K. Jha; S.N. Ojha

Addresses: Department of Mechanical Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi – 221005, India ' Department of Mechanical Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi – 221005, India ' Department of Metallurgical Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi – 221005, India

Abstract: The research objective of the present paper is to study the feasibility of bulk processing of Al-18Si-2.5Cu-0.6Fe alloy. The microstructural features induced during high-speed compression of alloy under different processing conditions have been investigated and reported. The compression of cylindrical test specimens between the top and bottom impression dies and also through a converging die at elevated temperatures has been considered for the study. Experiments have been performed with different aspect and reduction ratios for impression and converging die compression respectively. The results reveal that considerable refinement in the microstructure of the compressed alloy occurred and is more significant in converging die compression at elevated temperature. The development of microstructural features during hot compression of the alloy at different processing conditions was also discussed. The results of the present study provide a valuable insight to understand the microstructural refinement during high-speed compression at elevated temperatures.

Keywords: Al-18Si-2.5Cu-0.6Fe alloy; impression die compression; converging die compression; working temperature; high-speed compression; reduction ratio; aspect ratio; microstructural feature.

DOI: 10.1504/IJMMP.2017.092162

International Journal of Microstructure and Materials Properties, 2017 Vol.12 No.5/6, pp.332 - 347

Received: 13 Oct 2017
Accepted: 14 Dec 2017
Published online: 06 Jun 2018 *

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