Investigation of Ti-Fe-Co bulk alloys with high strength and enhanced ductility

Dmitri V. Louzguine-Luzgin, Larissa V. Louzguina-Luzgina, Hidemi Kato, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

122 Citations (Scopus)

Abstract

High-strength Ti-Fe-Co alloys were produced in the shape of arc-melted ingots with the dimensions of about 20-25 mm in diameter and 7-10 mm in height. The structure of the Ti-Fe-Co alloys (at Fe/Co ratio >1) studied by X-ray diffractometry and scanning electron microscopy consisted of an ordered Pm3̄m Ti(FeCo) compound and a disordered body-centered cubic Im3̄m β-Ti solid solution. The optimization of the Ti-Fe-Co alloy composition is performed from the viewpoint of both high strength and ductility. The strongest Ti-Fe-Co alloys have a hypereutectic structure and exhibit a high strength of about 2000 MPa and a plastic deformation of 15%. The high strength and ductility values can be achieved without using the injection mould casting or rapid solidification procedure. The deformation behavior and the fractography of Ti-Fe-Co alloys are studied in detail.

Original languageEnglish
Pages (from-to)2009-2017
Number of pages9
JournalActa Materialia
Volume53
Issue number7
DOIs
Publication statusPublished - 2005 Apr 1

Keywords

  • Mechanical properties
  • Scanning electron microscopy
  • X-ray diffraction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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