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Phase Transformation Studies of Laser-Processed Fe-0.2%C-Cr Surface Alloys

Published online by Cambridge University Press:  15 February 2011

A. Molian ,
P. J. Wang ,
K. H. Khan  and
W. E. Wood
A. Molian
Affiliation:
*Graduate Students, Materials Science Department, Oregon Graduate Center, Beaverton, OR 97006
P. J. Wang
Affiliation:
*Graduate Students, Materials Science Department, Oregon Graduate Center, Beaverton, OR 97006
K. H. Khan
Affiliation:
**Assistant Professor, Dept. of Mech. Engg., University of Portland, Portland, OR 97203
W. E. Wood
Affiliation:
***Professor and Chairman, Materials Science Department, Oregon Graduate Center, Beaverton, OR 97006.
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Abstract

Phase transformations in laser-processed Fe-0.2%C-Cr surface alloys with 5%, 10%, 20%, and 30%Cr were studied by light and electron microscopy.Alloys containing 5% and 10%Cr were found to be fully martensitic with a dislocated lath type substructure. Thin films of retained austenite and a homogeneous dispersion of fine carbides were observed at the lath boundaries and prior austenite grain boundaries. The alloy with a 20%Cr content showed a unique microstructure of twinnedaustenite needles in a dislocated ferrite matrix while the alloy containing 30%Cr exhibited a dislocated ferrite structure with M23C6 carbides.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 8 , 1981 , 511
Copyright
Copyright © Materials Research Society 1982

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References

REFERENCES

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