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

J. Das*, K. B. Kim, W. Xu, W. Löser, J. Eckert

*Corresponding author for this work

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)737-740
Number of pages4
JournalMaterials Science and Engineering A
Volume448-451
DOIs
Publication statusPublished - 25 Mar 2007
Externally publishedYes

Keywords

  • Fracture
  • Mechanical properties
  • Ti-alloys
  • Ultrafine eutectic

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