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Deformation behaviour of Rheocast A356 Al alloy at microlevel considering approximated RVEs

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


Field	Value

Title	Deformation behaviour of Rheocast A356 Al alloy at microlevel considering approximated RVEs

Creator	Islam, Sk. Tanbir Das, Prosenjit Das, Santanu

Subject	Al alloys

Description	A micromechanical approach is considered here to predict the deformation behaviour of Rheocast A356 (Al-Si-Mg) alloy. Two representative volume elements (RVEs) are modelled in the finite element (FE) framework. Two dimensional approximated microstructures are generated assuming elliptic grains, based on the grain size, shape factor and area fraction of the primary Al phase of the said alloy at different processing condition. Plastic instability is shown using stress and strain distribution between the Al rich primary and Si rich eutectic phases under different boundary conditions. Boundary conditions are applied on the approximated RVEs in such a manner, so that they represent the real life situation depending on their position on a cylindrical tensile test sample. FE analysis is carried out using commercial finite element code ABAQUS without specifying any damage or failure criteria. Micro-level in-homogeneity leads to incompatible deformation between the constituent phases of the rheocast alloy and steers plastic strain localisation. Plastic stain localised regions within the RVEs are predicted as the favourable sites for void nucleation. Subsequent growth of nucleated voids leads to final failure of the materials under investigation.

Publisher	Springer Link

Date	2015-03

Type	Article PeerReviewed

Identifier	Islam, Sk. Tanbir and Das, Prosenjit and Das, Santanu (2015) Deformation behaviour of Rheocast A356 Al alloy at microlevel considering approximated RVEs. Metals and Materials International, 21 (2). pp. 311-323.

Relation	http://cmeri.csircentral.net/203/