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Interactions of Mechanical Twinning and Dislocation Glide with Polytwin-Interfaces in L1o-Ordered Iron-Palladium Intermetallics

Published online by Cambridge University Press:  11 February 2011

Huiping Xu  and
Jörg Wiezorek
Huiping Xu
Affiliation:
Department of Materials Science and Engineering, University of Pittsburgh, 3700 O'Hara St., 848 Benedum Hall, Pittsburgh PA 15261, USA
Jörg Wiezorek
Affiliation:
Department of Materials Science and Engineering, University of Pittsburgh, 3700 O'Hara St., 848 Benedum Hall, Pittsburgh PA 15261, USA
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Abstract

The defect structures in polytwinned (PT) FePd have been studied after room temperature deformation by transmission electron microscopy (TEM). Interactions between gliding dislocations and mechanical twins with the {101}-conjugated PT-interfaces have been identified. Based on crystallographic analyses of shear transfer of dislocations and microtwins across the PT-interfaces in FePd boundary reactions have been identified that are consisted with the TEM observations. A model has been proposed, which is suitable to rationalize significant contributions to strain-hardening from these defect-interface interactions in PT-FePd.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 753: Symposium BB – Defect Properties and Related Phenomena in Intermetallic Alloys , 2002 , BB6.2
Copyright
Copyright © Materials Research Society 2003

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References

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