Campus Units

Materials Science and Engineering, Ames Laboratory

Document Type

Article

Publication Version

Accepted Manuscript

Publication Date

2015

Journal or Book Title

Materials Chemistry and Physics

Volume

163

First Page

512

Last Page

517

DOI

10.1016/j.matchemphys.2015.08.007

Abstract

Nb-modified ultrafine Ti–Si eutectic alloy was made by cold crucible levitation melting, tested in compression at room temperature, and characterized by electron microscopy. Compression tests of (Ti86.5Si13.5)97Nb3 specimens measured an ultimate compressive strength of 1180 MPa and a compressive plastic strain of 12%, both of which are higher than in eutectic Ti86.5Si13.5 alloy. Electron microscopy showed that the Ti–Si–Nb alloy had a bimodal microstructure with micrometer-scale primary α-Ti dendrites distributed in an ultrafine eutectic (α-Ti + Ti5Si3) matrix. The enhanced ductility is attributed to the morphology of the phase constituents and to the larger lattice mismatches between α-Ti and Ti5Si3 phases caused by the Nb addition. The crystallographic orientation relationship of Ti5Si3 with α-Ti is .

Comments

This is a manuscript of an article published as Cao, G. H., G. Y. Jian, N. Liu, W. H. Zhang, A. M. Russell, and D. Gerthsen. "Microstructure and mechanical properties of an ultrafine Ti–Si–Nb alloy." Materials Chemistry and Physics 163 (2015): 512-517, doi:10.1016/j.matchemphys.2015.08.007. Posted with permission.

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License.

Copyright Owner

Elsevier B.V.

Language

en

File Format

application/pdf

Published Version

Share

COinS