Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.msea.2008.04.049
Title: Heat-treating below recrystallization temperature to enhance compressive failure strain and work of fracture of magnesium
Authors: Paramsothy, M. 
Srikanth, N.
Hassan, S.F.
Gupta, M. 
Keywords: Aluminium
Compressive properties
Macrocomposite
Magnesium
Stressed interface
Issue Date: 25-Oct-2008
Source: Paramsothy, M., Srikanth, N., Hassan, S.F., Gupta, M. (2008-10-25). Heat-treating below recrystallization temperature to enhance compressive failure strain and work of fracture of magnesium. Materials Science and Engineering A 494 (1-2) : 436-444. ScholarBank@NUS Repository. https://doi.org/10.1016/j.msea.2008.04.049
Abstract: New bimetal magnesium/aluminium macrocomposite containing millimeter-scale Al core reinforcement was fabricated using solidification processing followed by hot coextrusion. Microstructural characterisation revealed increased grain size, Mg texture change and unbalanced interfacial interdiffusion of Mg and Al into each other. Stress at the bimetal interface was attributed to solid solution formation, thermal expansion mismatch, unbalanced Kirkendall strain, lattice misfit strain, and strain localization effects, these being interface localized strengthening phenomena. Compressive testing revealed that presence of Al core decreased 0.2% YS (-23%) and ultimate compressive strength (UCS) (-11%), but significantly increased failure strain (+134%) and work of fracture (+60%) of Mg in the as-extruded macrocomposite. Also, interfacial relaxation during heat treating significantly increased failure strain (+17%) and work of fracture (+17%) of Mg/Al macrocomposite without compromising 0.2% YS and UCS. The effects of presence of millimeter-scale Al core as well as interfacial relaxation on the compressive properties of the bimetal macrocomposite are investigated in this paper. © 2008 Elsevier B.V. All rights reserved.
Source Title: Materials Science and Engineering A
URI: http://scholarbank.nus.edu.sg/handle/10635/60437
ISSN: 09215093
DOI: 10.1016/j.msea.2008.04.049
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