Microstructure evolution in TiAl alloyed with Si

Journal Article · Thu Aug 01 04:00:00 EDT 1996 · Scripta Materialia

DOI:https://doi.org/10.1016/1359-6462(96)00144-3· OSTI ID:271582

Zhang, L; Wu, J ^[1]

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

Titanium aluminides are among those promising candidates for high-temperature structural use. Development of these alloys requires improved toughness and creep resistance while maintaining their inherently attractive properties. Eutectic alloy consisting of two intermetallic phases is a competitive design to the costly intermetallic-matrix composites in the present research. It has been shown that silicon additions to Ti and Ti{sub 3}Al lead to dual phase alloys containing Ti{sub 5}Si{sub 3} as the second phase. Based on previous work, it might be inferred that silicon additions to TiAl may introduce Ti{sub 5}Si{sub 3} in the matrix. Moreover, by referring to the Ti-Al diagram in the vicinity of the {gamma} field, changes to the liquidus valley in this region of the Ti-Al-Si system are implied. In this paper, investigation was undertaken to extend the understanding of the titanium aluminides which were alloyed with silicon and the Ti-Al-Si system.

• OSTI ID: 271582
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 3 Vol. 35; ISSN 1359-6462; ISSN XZ503X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
ANNEALING
CHEMICAL COMPOSITION
DIFFERENTIAL THERMAL ANALYSIS
EUTECTICS
INTERMETALLIC COMPOUNDS
MELTING
MICROSTRUCTURE
OPTICAL MICROSCOPY
PHASE DIAGRAMS
SCANNING ELECTRON MICROSCOPY
SILICON ALLOYS
TITANIUM ALLOYS
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY