The High Temperature Behaviour of TiAl Containing Carbide Reinforcements-Reference-Cited by-同舟云学术

The High Temperature Behaviour of TiAl Containing Carbide Reinforcements

Published:1990 Issue: Volume:194 Page:
ISSN:0272-9172
Container-title:MRS Proceedings
language:en
Short-container-title:MRS Proc.

Author:

Rösler J.,Valencia J. J.,Levi C. G.,Evans A. G.,Mehrabian R.

Abstract

AbstractThe mechanical behaviour of γ-TiAl reinforced with Ti2AIC platelets is investigated in the temperature range between 293K and 1255K. Comparison with the particle-free material of same matrix composition reveals a pronounced strengthening effect of the platelike reinforcements up to about 1000K. However, under creep loading the composite is remarkably weak. It is shown that this weakness is caused by diffusional creep along the particle/matrix interface. Modelling of this process indicates that the dimensions of the Ti2AlC particles (thickness d=lμm, length l=20μm) are too small to avoid this unwanted deformation mechanism. It is concluded that thicknesses well above 10±m are needed to maintain reinforcement strengthening at high temperature in this system.

Publisher

Springer Science and Business Media LLC

Subject

General Engineering

Reference16 articles.

1. 15. Kawabata T. , Tamura T. , Izumi O. , in High Temperature Ordered Intermetallic Alloys IMl edited by Liu C. T. , Taub A. I. , Stoloff N. S. , Koch C. C. (Mater. Res. Soc. Proc., 133) pp. 329–334.

2. 12. Rösler J. , Bao G. , Evans A. G. , to be published.

3. 14. Choi B. W. , Deng Y. G. , McCullough C. , Paden B. , Mehrabian R. , submitted to Acta Metall.

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