The {beta}-Ti(Al,Si) + Ti{sub 5}(Si,Al){sub 3} eutectic reaction in the Ti-Al-Si ternary system

Journal Article · Sat Jan 15 04:00:00 EST 1994 · Scripta Metallurgica et Materialia

DOI:https://doi.org/10.1016/0956-716X(94)90042-6· OSTI ID:231085

Wu, J; Qiu, G; Zhang, L ^[1]

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1. Shanghai Jiao Tong Univ. (China). Dept. of Materials Science

Dual phase alloys Ti + Ti{sub 5}Si{sub 3} or Ti{sub 3}Al + Ti{sub 5}(Si,Al){sub 3} are recently of special interest, due to their probable high performance at elevated temperatures. In 1988, a eutectic line of Ti{sub 3}(Al,Si) + Ti{sub 5}(Si,Al){sub 3} was first established in a Ti-rich portion of the Ti-Al-Si system, and was further reported in the following years. However, the reported line only covered a limited range in the Ti-Al-Si ternary system; thus, extensive study over a wider range in the ternary phase diagram is necessary. In the present paper, the details of the {beta}-Ti(Al,Si) + Ti{sub 5}(Si,Al){sub 3} eutectic line, ranging from 0 at% Al to 40 at% Al will be reported, together with the melting temperatures and the microstructures of the eutectic alloys. It is suggested that the eutectic line in this paper means the liquidus valley between {beta}-Ti-rich liquidus surface and Ti{sub 5}Si{sub 3}-rich liquidus surface, while the eutectic microstructure, here, means the coupled-growth microstructure solidified along this liquidus valley.

• OSTI ID: 231085
• Journal Information: Scripta Metallurgica et Materialia, Journal Name: Scripta Metallurgica et Materialia Journal Issue: 2 Vol. 30; ISSN SCRMEX; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
EUTECTICS
EXPERIMENTAL DATA
HEAT RESISTING ALLOYS
MELTING POINTS
MICROSTRUCTURE
SILICON ALLOYS
TITANIUM ALLOYS