Novel defects in Al-Pd-Fe complex metallic alloys: A micromechanical modelling approach

作者：Krishna K V Mani^*; Arya A; Heggen M; Dey G K; Feuerbacher M; Banerjee S

来源：Intermetallics, 2011, 19(1): 99-104.

DOI：10.1016/j.intermet.2010.09.017

• Ternary alloy systems
• Defects dislocation geometry and arrangement
• Defects theory

Transmission electron microscopy investigations have revealed that in the face centred complex metallic alloy of C-2-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 C-2 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-equilibnum defect

• 出版日期2011-1