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Title: Effects of milling on strength and ductility of Mg alloy
Authors: Chua, B.W.
Lu, L. 
Lai, M.O. 
Issue Date: 2005
Citation: Chua, B.W.,Lu, L.,Lai, M.O. (2005). Effects of milling on strength and ductility of Mg alloy. Materials Forum 29 : 228-232. ScholarBank@NUS Repository.
Abstract: Mechanical properties of bulk Mg alloy synthesized by mechanical alloying and powder consolidation are investigated in this paper. Reduction in grain size and formation of second phase structure were effectively achieved through milling. Tensile tests at ambient temperature revealed a dramatic increase in yield strength for the sample mechanically alloyed for 5 hours. For longer milling durations, strain softening occurred with gradual decrease in yield strength but improvement in ductility. Low yield strength of 160 MPa but amazingly large elongation of 46% was found in the 30 hour milled sample which had an average grain size of about 75 nm. The competing mechanical behavior of the milled Mg alloy is believed to be caused by the change in deformation mechanism where grain boundary sliding becomes dominant at certain grain size. © Institute of Materials Engineering Australasia Ltd.
Source Title: Materials Forum
ISSN: 08832900
Appears in Collections:Staff Publications

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