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Fracture and Fractography of Ordered Ni4Mo

Published online by Cambridge University Press:  26 February 2011

H. P. Kao ,
C. R. Brooks  and
M. Sanganeria
H. P. Kao
Affiliation:
Chung-Shan Institute of Science and Technology, Lung-Tan, Taiwan, Republic of China
C. R. Brooks
Affiliation:
Materials Science and Engineering Department, The University of Tennessee, Knoxville, TN 37996-2200
M. Sanganeria
Affiliation:
Materials Science and Engineering Department, The University of Tennessee, Knoxville, TN 37996-2200
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Abstract

The domain structure of the alloy Ni-20 at. % Mo depends upon the heat treatment below the critical temperature (868°C). Upon aging around 750–850°C, initially a very fine domain structure forms inside the a grains, which then coarsens, and then migration of these boundaries occurs with a coarser domains structure behind them. In the ordered condition, the alloy is very brittle. Fractographs are presented which correlate the fracture morphology to the microstructures of the ordered alloy, showing that fracture occurs along the migrated, former α grain boundaries.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 133: Symposium H – High-Temperature Ordered Intermetallic Alloys III , 1988 , 749
Copyright
Copyright © Materials Research Society 1989

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References

REFERENCES

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