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OPTIMIZED COMPOSITIONS OF Ti-(Cu, Ni)-Sn ALLOY FOR METALLIC GLASS FORMATION AND THEIR CORRELATION WITH EUTECTIC REACTION |
LIU Yuanshuai; XU Jian |
Shenyang National Laboratory for Materials Science; Institute of Metal Research; Chinese Academy of Sciences |
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Cite this article:
LIU Yuanshuai XU Jian. OPTIMIZED COMPOSITIONS OF Ti-(Cu, Ni)-Sn ALLOY FOR METALLIC GLASS FORMATION AND THEIR CORRELATION WITH EUTECTIC REACTION. Acta Metall Sin, 2008, 44(12): 1424-1430.
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Abstract Adopting the “3D pinpointing approach”, compositional dependence of glass--forming ability (GFA) for Ti-(Cu1-xNix)-Sn (0.20≤x≤0.30, atomic fraction) quaternary alloys was systematically investigated. The alloy with the optimized GFA is located at Ti38Cu37.8Ni16.2Sn8. Its critical diameter for metallic glass formation is near 1.0 mm for the rods fabricated using Cu mold casting. This metallic glass exhibits the supercooled liquid region ΔTx of 56 K and the reduced glass transition temperature Trg of 0.57. By characterizing the microstructure of the arc-melted Ti38Cu37.8Ni16.2Sn8 alloy, it is indicated that solidification of the alloy melt undergoes a pseudo-binary eutectic reaction of L→Ti5Sn3Cu+TiCuNi.
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Received: 26 March 2008
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