Microstructural evolution of near-{gamma} TiAl alloys during long-time heat treatments

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

DOI:https://doi.org/10.1016/1359-6462(96)00154-6· OSTI ID:271583

Dudzinski, D; Beddoes, J ^[1]; Zhao, L; Wallace, W ^[2]

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1. Carleton Univ., Ottawa, Ontario (Canada). Dept. of Mechanical and Aerospace Engineering
2. National Research Council of Canada, Ottawa, Ontario (Canada). Inst. for Aerospace Research

Near-{gamma} titanium aluminide (TiAl) alloys have potential as lightweight high temperature structural materials for the automotive and aerospace industries. This can be attributed to the material`s low density, good oxidation, resistance, high elastic modulus, and good elevated-temperature strength retention. However, the microstructural evolution of near-{gamma} TiAl alloys during extended heat treatment periods has not been studied in detail and therefore, a comprehensive understanding of these microstructures is not available. This paper focuses on the microstructural response of three powder metallurgy (P/M) near-{gamma} TiAl alloys to long-time heat treatments at temperatures near the {alpha}transus temperature (T{sub {alpha}}). Relevant microstructural features are characterized and T{sub {alpha}} for each alloy is determined.

• OSTI ID: 271583
• 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

33 ADVANCED PROPULSION SYSTEMS
36 MATERIALS SCIENCE
AEROSPACE INDUSTRY
ALUMINIUM ALLOYS
AUTOMOBILES
CHEMICAL COMPOSITION
GRAIN SIZE
HEAT TREATMENTS
HEATING
HOT PRESSING
INTERMETALLIC COMPOUNDS
LAMELLAE
MATERIALS
MICROSTRUCTURE
POWDERS
TITANIUM ALLOYS