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 language | English |
|---|---|
| Article number | S4.3 |
| Pages (from-to) | 133-138 |
| Number of pages | 6 |
| Journal | Materials Research Society Symposium Proceedings |
| Volume | 842 |
| Publication status | Published - 2005 Aug 26 |
| Event | 2004 MRS Fall Meeting - Boston, MA, United States Duration: 2004 Nov 29 → 2004 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