Precipitation kinetics of lamellar ({gamma}) laths in a TiAl-base alloy

Journal Article · Thu May 01 04:00:00 EDT 1997 · Scripta Materialia

DOI:https://doi.org/10.1016/S1359-6462(96)00502-7· OSTI ID:474212

Zhang, W J; Francesconi, L; Evangelista, E ^[1]

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1. Univ. of Ancona (Italy). Dept. of Mechanics

Titanium aluminide is a candidate material for high temperature applications. Although different types of microstructure have been produced in TiAl-base alloys, the fully-lamellar structure is currently regarded as the most attractive. This kind of microstructure can be characterized by the factors, namely, colony size, lamellar interspacing, the existence of Widmanstatten (secondary) laths, and the type of grain boundaries (smooth or interlocking). The objective of this paper is to examine the nucleation and growth kinetics of {gamma} lamellar laths during continuous and isothermal cooling. These data are expected to benefit the understanding of the transformation mechanism and the design of lamellar TiAl microstructure for industrial application.

• Sponsoring Organization: Ente Nazionale per l`Energia Elettrica, Rome (Italy); European Union EU, Brussels (Belgium)
• OSTI ID: 474212
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 9 Vol. 36; ISSN 1359-6462; ISSN SCMAF7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
GRAIN BOUNDARIES
HEAT TREATMENTS
KINETICS
LAMELLAE
MICROSTRUCTURE
NUCLEATION
PHASE TRANSFORMATIONS
TITANIUM ALLOYS
TUNGSTEN ALLOYS