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Ductile-Phase Toughening of Cr3Si with Chromium

Published online by Cambridge University Press:  21 February 2011

Joseph W. Newkirk  and
J. Alan Sago
Joseph W. Newkirk
Affiliation:
Dept. of Metallurgical Eng., University of Missouri-Rolla, Rolla, MO 65401.
J. Alan Sago
Affiliation:
Dept. of Metallurgical Eng., University of Missouri-Rolla, Rolla, MO 65401.
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Abstract

Cr-Si alloys offer important advantages as an aerospace material, including high service temperature and good oxidation resistance. This in-situ composite combines a hard, brittle silicide phase with a softer chromium phase. The soft phase is intended to add damage tolerance. Alloys with high volume percents of the silicide phase had good strength values at temperatures up to 1200C or more. Microhardness indents were used to demonstrate that the chromium phase could act as a crack bridging material. In addition the microstructural stability of these materials was studied with encouraging results.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 194: Symposium R – Intermetallic Matrix Composites I , 1990 , 183
Copyright
Copyright © Materials Research Society 1990

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