Release Time:2019-03-11  Hits:

Indexed by: Conference Paper

Date of Publication: 2012-07-13

Included Journals: Scopus、SCIE、CPCI-S、EI

Volume: 747-748

Page Number: 885-+

Key Words: beta-Ti alloys; Composition design; Cluster-plus-glue-atom model; Young's modulus; Structural stability

Abstract: [(Mo,Sn)(Ti,Zr)(14)]Nb-1 serial alloy compositions were designed using a cluster-plus-glue-atom model to receive BCC beta -Ti alloys with low Young's modulus (E) in Ti-based multi-component systems, where the square brackets enclose the coordination polyhedron cluster CN14 of the BCC structure and Nb is the glue atom. These serial alloys were prepared into rods with a diameter of 6 mm by copper-mould suction casting method. XRD and tensile test results indicated that all these alloy series possessed a monolithic BCC structure except [SnTi14]Nb-1 and [(Mo0.5Sn0.5)Ti-14]Nb-1 due to Sn deteriorating BCC structural stability. A combination of Mo0.5Sn0.5 at the cluster center, as well as low-E Nb and Zr in the glue and cluster shell respectively, can reach simultaneously low E and high BCC stability, incarnated in the [(Mo0.5Sn0.5)(Ti13Zr)]Nb-1 alloy which has the lowest E of 48 GPa in the suction-cast state.