High temperature tensile properties of modified Mg/Mg2Si in situ composite

Non-reactive in situ process is one of the newly emerged routes for metal matrix composite manufacturing, in which recycling of their scraps has been found to be advantageous. In the present work, the Mg/Mg2Si composite was synthesized using non-reactive in situ method. Improving coarse and dendritic structure of primary Mg2Si precipitates was a reason for modification of primary Mg2Si particles. By adding 0.5 wt.% bismuth to the melt, the primary Mg2Si particles were formed in polygonal morphologies while their average size decreased. Tensile tests in different temperatures were conducted on non-modified and modified composite specimens. Tensile properties of the modified composites in different temperatures were enhanced compared to those of non-modified ones. (C) 2011 Elsevier Ltd. All rights reserved.