Mani Krishna, K. V. ; Arya, A. ; Heggen, M. ; Dey, G. K. ; Feuerbacher, M. ; Banerjee, S. (2011) Novel defects in Al-Pd-Fe complex metallic alloys: a micromechanical modelling approach Intermetallics, 19 (1). pp. 99-104. ISSN 0966-9795
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.intermet.2010.09.017
Abstract
Transmission electron microscopy investigations have revealed that in the face centred complex metallic alloy of C2-Al-Pd-Fe, the dislocations mediating plastic flow are decorated by localized regions of body centred structure in the compressive part of their strain field thus forming composite defects. We calculated the properties of these defects using a micromechanical model. The Eshelby method was employed to estimate the energies involved in the formation of such defects in the face-centred C2 phase. We could reproduce the experimentally observed features of the defects in terms of their size and spatial configuration. The model describes a unique mechanism of a non-equilibrium defect, i.e., a dislocation, being stabilized by the formation and interaction with another non-equilibrium defect, i.e., a nanometre sized inclusion of different structure.
Item Type: | Article |
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Source: | Copyright of this article belongs to Elsevier Science. |
Keywords: | A. Ternary Alloy Systems; D. Defects: Dislocation Geometry And Arrangement; E. Defects: Theory |
ID Code: | 82260 |
Deposited On: | 10 Feb 2012 04:58 |
Last Modified: | 10 Feb 2012 04:58 |
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