Hits:

Indexed by:期刊论文

Date of Publication:2015-02-25

Journal:MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

Included Journals:SCIE、EI

Volume:626

Page Number:369-374

ISSN No.:0921-5093

Key Words:Zr-Ti-Mo-Sn-Nb alloys; Alloy design; Phase transformations; Mechanical properties; Magnetic properties

Abstract:The multi-element Zr-based bio-alloys are optimized for reaching lower Young's modulus and magnetic susceptibility by introducing the cluster-plus-glue-atom model to realize the composition design. A general cluster formulas of [(Mo,Sn)-(Zr,Ti)(14)]Nb-x (x=1,3) was obtained from the model and alloy rods with a diameter of 3 mm were prepared by copper-mold suction-casting processing. The 13 structural stabilities of the designed alloys were studied by the valence electron concentration (VEC). Among the beta-Zr alloys, the [(Mo0.5Sn0.5)-Zr-14]Nb-1 (Zr87.5Nb6.25Sn3.13 at%) and [(Mo0.5Sn0.5)-(Zt(13)Ti)Nb-1 (Zr81.25Nb6.25Ti6.25Mo3.13Sn3.13 at%) alloys, corresponding to the lower beta stability limit, display lower Young's moduli (77-79 GPa), lowest magnetic susceptibilities (2.12 x 10(-6)-2.13 x 10(-6) cm(3) g(-1)), as well as higher Vickers hardness (288-311 HV). (C) 2014 Elsevier B.V. All rights reserved.