Influence of hot rolling on microstructure and mechanical behaviour of A16061-ZrB2 in-situ metal matrix composites

Kumar, Vasanth R and Keshavamurthy, R and Perugu, Chandra S and Koppad, Praveennath G and Alipour, Mohammad (2018) Influence of hot rolling on microstructure and mechanical behaviour of A16061-ZrB2 in-situ metal matrix composites. In: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 738 . pp. 344-352.

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Abstract

Synthesis of aluminium based metal matrix composites by in-situ reaction is considered as an alternative method for production of high quality metal matrix composites. In-situ technique eliminates the limitations associated with ex-situ processing technique and it is one of the most widely accepted one. In the present work, Al6061ZrB(2)in-situ composites have been developed by stir casting technique using commercially available Al-10%Zr and Al-3%B master alloys. Cast matrix alloy and developed in-situ composites were hot rolled at a temperature of 400 degrees C. Both as-cast and hot rolled matrix alloy and its in-situ composites were subjected to microstructure analysis, microhardness test, grain size studies and tensile test. Tensile behaviour of hot rolled alloy and its insitu composites were evaluated in the rolling direction (RD), 45 degrees from rolling direction (45D) and transverse direction (TD) and compared with cast ones. Optical and SEM micrographs of hot rolled in-situ composites show that the ZrB2 particles are aligned in the rolling direction. Both as-cast and hot rolled in-situ composites have displayed extensive grain refinement and enhanced mechanical properties when compared with unreinforced alloy. However, ductility of the in-situ composites decreases with increase in ZrB2 content. Hot rolled alloy and its in-situ composites exhibited remarkable improvement in ultimate tensile strength and ductility at 45 degrees from rolling direction compared to transverse and rolling directions.

Item Type:	Journal Article
Publication:	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Publisher:	ELSEVIER SCIENCE SA
Additional Information:	Copyright for this article belongs to ELSEVIER SCIENCE SA
Keywords:	A16061 alloy;Composites;Hot rolling;Microstructure; Mechanical properties
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	07 Dec 2018 07:35
Last Modified:	07 Dec 2018 07:35
URI:	http://eprints.iisc.ac.in/id/eprint/61211

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