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Electron Microscopic Observation on the Structure of Ni(Cu)AI Martensite

Published online by Cambridge University Press:  26 February 2011

Seung-Hyuk Kang ,
Seung-Jun Jeon  and
Hu-Chul Lee
Seung-Hyuk Kang
Affiliation:
Seoul National University, Seoul 151–742 Korea
Seung-Jun Jeon
Affiliation:
Seoul National University, Seoul 151–742 Korea
Hu-Chul Lee
Affiliation:
Seoul National University, Seoul 151–742 Korea
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Abstract

In an effort to seek a way to toughen NiAL intermetallic compounds, deformation characteristics of copper containing NiAL martensite were studied by electron microscopy. Martensite plates with fine {111} <112> internal twins were well developed across the grains in as extruded alloys. Initial linear work hardening up to 7 % strain was observed and the migration of twin interface and martensite plate interfaces were suggested as major deformation modes at this stage. Increase in strain hardening rate after 7 % strain was associated with the development of dislocation structure and growth of new strain induced twins within the internal twin free martensite plates.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 213: Symposium Q – High-Temperature Ordered Intermetallic Alloys IV , 1990 , 385
Copyright
Copyright © Materials Research Society 1991

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References

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