Solidification and phase transformation characteristics of Ti-Al-Mn ternary alloys

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:225123

Butler, C J; McCartney, D G ^[1]

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1. Univ. of Nottingham (United Kingdom). Dept. of Materials Engineering and Materials Design

Four ternary alloys containing a nominally constant Ti:Al ratio and a varying Mn level (5, 10, 20 and 30 at%) were prepared using plasma arc melting. High temperature differential thermal analysis (DTA) was performed to investigate phase transformation temperatures. As-cast and DTA sample microstructures were characterized using optical microscopy and scanning electron microscopy with back scattered electron imaging and energy dispersive X-ray analysis. High temperature annealing experiments were also performed and the phases present after quenching to room temperature examined. All the as-cast alloys were found to contain the phases {gamma}-TiAl, {alpha}-Ti{sub 3}Al and a phase with the crystallography of Mn{sub 2}Ti (Laves). The {gamma}-TiAl content decreased whilst the {alpha}{sub 2}-Ti{sub 3}Al and Laves Contents increased with increasing Mn levels.

• OSTI ID: 225123
• Report Number(s): CONF-950201--; ISBN 0-87339-304-X
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
36 MATERIALS SCIENCE
AEROSPACE INDUSTRY
ALUMINIUM ALLOYS
ANNEALING
AUTOMOBILES
CHEMICAL COMPOSITION
DENDRITES
DIFFERENTIAL THERMAL ANALYSIS
INTERMETALLIC COMPOUNDS
MANGANESE ALLOYS
MATERIALS
MICROSTRUCTURE
OPTICAL MICROSCOPY
PHASE TRANSFORMATIONS
PLASMA HEATING
SAMPLE PREPARATION
SCANNING ELECTRON MICROSCOPY
SOLIDIFICATION
TITANIUM ALLOYS