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Tensile properties and microstructural characteristics of indirect rheoformed A356 aluminum alloy

Bolouri, Amir; Bae, Jung Woon; Kang, Chung Gil

Authors

Amir Bolouri Amir.Bolouri@uwe.ac.uk
Associate Professor in Manufacturing

Jung Woon Bae

Chung Gil Kang



Abstract

The effects of rheoforming parameters such as the rheoforming temperature and pressure on the tensile properties of H-shaped components were examined. An H-shaped component is useful for practical investigation into the influence of different wall thicknesses on the microstructural and mechanical properties. A simulation study on the effect of forming pressure on the die filling was conducted using the DEFORM-3D package, and the results were compared with that obtained using the actual rheoforming. The semisolid slurries were prepared by employing the electromagnetic stirring (EMS) technique. The components were rheoformed at different forming conditions and their tensile properties in the center and side positions were evaluated and linked to the corresponding microstructure. The tensile properties remained approximately constant when the rheoforming temperature was increased from 580 °C to 590 °C, but was followed by a substantial reduction at 600 °C. Moreover, the tensile properties in the center and side positions were distinct. Increasing the rheoforming pressure from 200. MPa to 250. MPa had a harmful effect on the elongation values, whereas the effect on the ultimate tensile strength values was limited. This trend could be linked to the increase in prevalence of internal defects such as the liquid segregation. © 2012 Elsevier B.V.

Journal Article Type Article
Acceptance Date Oct 29, 2012
Online Publication Date Nov 17, 2012
Publication Date Feb 1, 2013
Journal Materials Science and Engineering A
Print ISSN 0921-5093
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 562
Pages 1-8
DOI https://doi.org/10.1016/j.msea.2012.10.099
Keywords rheoforming, A356 aluminum alloy, microstructure, tensile properties
Public URL https://uwe-repository.worktribe.com/output/936989
Publisher URL http://dx.doi.org/10.1016/j.msea.2012.10.099