A Zr-based bulk metallic glass (BMG) in situ composite with a designed composition of Zr60Ti14.67Nb5.33Cu5.56Ni4.44Be10 was prepared based on both modifying alloy composition and controlling solidification process. The composite contains high volume fraction of coarsen bcc β-Zr(Ti, Nb) solid solution. The β phase particles are short rod-like, worm-like, and nearly spherical in morphology rather than typical dendrite structure, their volume fraction and average diameter were estimated to be about 55% and 20 μm, respectively. The composite displays a large fracture strain up to 22.3% under uniaxial compression at room temperature. The coarse β phase and its high volume fraction were thought to be responsible for the excellent plastic deformability of the present composite.
High Volume Fraction Bulk Metallic Glass Ductile Phase Present Composite Multiple Shear Band
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This work was supported by Natural Science Research Projects of The Education Department of Henan Province China (Grant Nos. 2008A430010 and 2009B430007) and R & D start-up projects of high-level talents of North China University of Water Resources and Electric Power (Grant No. 200709).