Authors: KQ Qiu QF Li YL Ren WH Jiang XG Yuan
Publish Date: 2007/11/02
Volume: 39, Issue: 8, Pages: 1882-1887
Abstract
The glassforming ability GFA thermal stability and mechanical properties of ternary MgCuNd alloys were investigated The results show that the amorphous structure of about 3 mm in diameter can be obtained in the composition range of 53 to 59 at pct Mg 32 to 38 at pct Cu and 9 to 11 at pct Nd Differential scanning calorimeter DSC measurements show that the bulk metallic glasses BMGs exhibit distinct glass transition temperature and supercooled liquid region before crystallization However the GFA for the present alloys cannot be explained by the existing calculated parameters while it can be better explained by the strategy for pinpointing the best glassforming alloys in terms of microstructure evolution Compared with Mg57Cu33Y10 BMG MgCuNd BMGs show a better fracture strength which is increased with the copper content for those Ndcontaining BMGs Viscous flow was observed on the fracture surfaces of compressive samples showing that apparent strengths can be reproducible The MgCuNd BMGs are challengeable in potential application for engineering materials due to their high strength and low costThis article is based on a presentation given in the symposium entitled “Bulk Metallic Glasses IV” which occurred February 25–March 1 2007 during the TMS Annual Meeting in Orlando Florida under the auspices of the TMS/ASM Mechanical Behavior of Materials Committee
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