Investigation of the structure and properties of hypereutectic Ti-based bulk alloys

Dmitri Valentinovich Louzguine, Larissa V. Louzguina-Luzgina, Akihisa Inoue

Research output: Contribution to journalConference articlepeer-review

Abstract

Structure and mechanical properties of binary Ti-TM (TM-other transition metals) and ternary Ti-Fe-(TM, B or Si) alloys produced in the shape of the arc-melted ingots of about 25 mm diameter and 10 mm height are studied. The formation of high-strength and ductile hypereutectic alloys was achieved in the Ti-Fe, Ti-Fe-Cu and Ti-Fe-B systems. The structures of the high-strength and ductile hypereutectic alloys studied by X-ray diffractometry and scanning electron microscopy were found to consist of the primary cubic Pm3̄m intermetallic compound (TiFe-phase or a solid solution on its base) and a dispersed eutectic consisting of this Pm3̄m intermetallic compound + BCC Im3̄m β-Ti supersaturated solid solution phase. The hypereutectic Ti-Fe alloy showed excellent compressive mechanical properties. The addition of Cu improves its ductility. B addition increased mechanical strength. Ni, Cr and Mn additions caused embrittlement owing to the formation of alternative intermetallic compounds. The deformation behaviour and the fractography of the Ti-based alloys were studied in details. The reasons for the high strength and good ductility of the hypereutectic alloys are discussed.

Original languageEnglish
Article numberS4.3
Pages (from-to)133-138
Number of pages6
JournalMaterials Research Society Symposium Proceedings
Volume842
Publication statusPublished - 2005 Aug 26
Event2004 MRS Fall Meeting - Boston, MA, United States
Duration: 2004 Nov 292004 Dec 2

Keywords

  • Ductility
  • High strength
  • Intermetallic compound
  • Mechanical properties
  • Ti-based alloys

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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