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Creep Behavior and Microstructure of XD™ Titanium Aluminide

Published online by Cambridge University Press:  21 February 2011

C. R. Feng ,
H. H. Smith ,
D. J. Michel  and
C. R. Crowe
C. R. Feng
Affiliation:
Materials Science and Technology Division, Naval Research Laboratory, Washington, DC 20375-5000
H. H. Smith
Affiliation:
Materials Science and Technology Division, Naval Research Laboratory, Washington, DC 20375-5000
D. J. Michel
Affiliation:
Materials Science and Technology Division, Naval Research Laboratory, Washington, DC 20375-5000
C. R. Crowe
Affiliation:
Materials Science and Technology Division, Naval Research Laboratory, Washington, DC 20375-5000
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Abstract

The creep behavior of extruded XD™ Ti-47at%Al/7.5v%TiB2 composite was investigated together with extruded Ti-46at%Al alloy. Prior to creep testing, both materials received a duplex heat-treatment at 1200°C for 16h plus 900°C for 8h. The creep tests were conducted at 69, 103 and 138MPa at 760°C in air. The microstructures of both materials prior to and after the creep testing were examined by TEM. The microstructures suggest that the formation of the TiAl/Ti3Al two-phase lamellar structure was the predominant creep mechanism.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 194: Symposium R – Intermetallic Matrix Composites I , 1990 , 219
Copyright
Copyright © Materials Research Society 1990

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References

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