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Microstructural evolution and hardness property of in situ Al–Mg2Si composites using one-step gravity casting method

IR@CMERI: CSIR- Central Mechanical Engineering Research Institute (CMERI), Durgapur


Field	Value

Title	Microstructural evolution and hardness property of in situ Al–Mg2Si composites using one-step gravity casting method

Creator	Biswas, Prosanta Mondal, Manas Kumar Roy, Himadri Mandal, Durbadal

Description	In the present investigation, Al–X wt-% Mg2Si (X = 0, 5, 10, 15 and 20) in situ composites are successfully synthesised by one-step gravity casting technique. Commercially pure Al, Mg and Si are used as raw materials. Microstructural evaluation and correlation of micro- and bulk hardness properties have been studied on developing composites. The composites consist of mainly three phases: matrix (α-Al), reinforcing (primary Mg2Si) and binary eutectic (Al–Mg2Si) phase. Primary Mg2Si particles are formed by pseudo-eutectic transformation during solidification and surrounded by matrix and binary eutectic phase. It is found that Mg2Si concentration has a significant impact on morphology and volume per cent of the above-mentioned phases. Primary Mg2Si particles’ size and volume per cent increase with increasing wt-% of Mg2Si. Volume per cent of individual phases and Mg2Si concentration have great impact on hardness properties of composites. Bulk hardness increases with increasing wt-% of Mg2Si concentration, but micro-hardness of primary Mg2Si particle decreases slightly. Mg2Si concentration also has significant impact on micro-hardness of individual phases.

Publisher	Taylor & Francis

Date	2017

Type	Article PeerReviewed

Identifier	Biswas, Prosanta and Mondal, Manas Kumar and Roy, Himadri and Mandal, Durbadal (2017) Microstructural evolution and hardness property of in situ Al–Mg2Si composites using one-step gravity casting method. Canadian Metallurgical Quarterly, 56 (3). pp. 340-348.

Relation	http://cmeri.csircentral.net/484/