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Indexed by:期刊论文

Date of Publication:2013-04-01

Journal:METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE

Included Journals:SCIE、EI

Volume:44A

Issue:4

Page Number:1872-1879

ISSN No.:1073-5623

Abstract:beta-Ti bio-alloys with low Young's moduli (E) require multiple alloying using both BCC stabilizers and low-E elements. In this study, the cluster-plus-glue-atom model was introduced in the composition interpretation and design of Ti-based (Ti,Zr)-(Mo,Sn)-Nb alloys. Alloying elements are grouped according to their enthalpies of mixing with Ti, forming a general cluster formula [(Mo,Sn)(Ti,Zr)(14)]Nb-1 or 3, where the square brackets enclose the nearest neighbor coordination polyhedron cluster CN14 of the BCC structure and Nb is the glue atom. The formulated compositions could reach simultaneously low E and high beta-Ti structural stabilities, as exemplified by [(Mo0.5Sn0.5)(Ti13Zr)]Nb-1 which had a Young's modulus as low as 48 GPa in the suction-cast state.