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Formation of ductile ultrafine eutectic structure in Ti-Fe-Sn alloy

conference contribution
posted on 2007-03-25, 00:00 authored by J Das, K B Kim, Wei XuWei Xu, W Löser, J Eckert
A Ti67.79Fe28.36Sn3.85 (at.%) alloy has been prepared through arc-melting and solidification at a cooling rate of 40-10 K/s. The as-prepared microstructure exhibits a two-phase ultrafine eutectic consisting of FeTi (B2) and β-Ti (A2) phases. The mechanical properties (maximum strength, σmax = 1939 MPa; strain to fracture, εf = 13.5%) are considerably improved if compared with the model Ti70.5Fe29.5 eutectic alloy (σmax = 1733 MPa, εf = 3.4%). The improvement of plastic deformability is assessed in terms of a detailed investigation of the microstructure and fractographic studies. The presence of Sn is believed to boost the ease of slip transfer across the interface between the A2/B2 phases due a higher lattice mismatch between the structures. © 2006 Elsevier B.V. All rights reserved.

History

Volume

449-451

Pagination

737 - 740

ISSN

0921-5093

Publication classification

E1.1 Full written paper - refereed

Title of proceedings

Materials Science and Engineering A