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Synthesis of Ti–Sn–Nb alloy by powder metallurgy

journal contribution
posted on 2008-06-25, 00:00 authored by Alireza Nouri, Xiaobo Chen, Yuncang Li, Y Yamada, Peter HodgsonPeter Hodgson, Cui'E Wen
The microstructural evolution and characteristics of the Ti–16Sn–4Nb powder particles and bulk alloys sintered from the powders ball-milled for various periods of time were studied. Results indicated that ball milling to 8 h led to the development of a supersaturated hcp α-Ti and partial amorphous phase due to the solid solution of Sn and Nb into Ti lattice. The bulk Ti–16Sn–4Nb alloy made from the powders ball milled for a short time, up to 2 h, exhibited a primary α and a Widmanstätten structure consisting of interlaced secondary α and β. With an increase in ball milling time up to 10 h, the microstructure evolved into a fine β phase dispersed homogeneously within α phase matrix. The microhardness values of the bulk alloy in both α- and β-phases increased with the increasing of the ball milling time and reached a plateau value at 8 h and longer, i.e. 687 and 550 HV for α- and β-phases, respectively. Likewise, the microhardness of the α phases was always higher than that of the β phases in the bulk alloys made from the powders ball milled for the same milling time.

History

Journal

Materials science and engineering A: structural materials: properties, microstructures and processing

Volume

485

Issue

1-2

Pagination

562 - 570

Publisher

Elsevier SA

Location

Lausanne, Switzerland

ISSN

0921-5093

eISSN

1873-4936

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2008, Elsevier