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High-strength binary Ti–Fe bulk alloys with enhanced ductility

Published online by Cambridge University Press:  01 December 2004

Dmitri V. Louzguine ,
Hidemi Kato ,
Larissa V. Louzguina  and
Akihisa Inoue
Dmitri V. Louzguine*
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
Hidemi Kato
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
Larissa V. Louzguina
Affiliation:
Research and Development Project, CREST, Japan Science and Technology Agency, Sendai 985-8577, Japan
Akihisa Inoue
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
*
a)Address all correspondence to this author. e-mail: dml@imr.edu Spelling of the family names.
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Abstract

The structure of hypoeutectic, hypereutectic, and eutectic Ti–Fe alloys produced in the shape of arc-melted ingots was found to consist of the ordered Pm-3m TiFe and disordered BCC Im3m β–Ti solid solution phase. The dimensions of the ingots were about 25–40 mm in diameter and 10–15 mm in height, and their structure was studied by x-ray diffractometry and scanning electron microscopy. The rectangular parallelepiped-shaped samples 2.5 × 2.5 × 5 mm in size cut from the central part of the ingots exhibit a high strength of about 2000 MPa, except for Ti60Fe40, and a certain ductility. The relatively low density of Ti (4.5 Mg/m3) implies high strength/density ratio for the studied alloys. These alloys are characterized by the low cost of the alloying element Fe and, compared to most of the high-strength non-equilibrium materials, do not require additional injection mold casting or rapid solidification procedures.

Keywords

Mechanical propertiesScanning electron microscopy (SEM)X-ray diffraction (XRD)
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 12 , December 2004 , pp. 3600 - 3606
Copyright
Copyright © Materials Research Society 2004

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References

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