Energetics of BCC-FCC Lattice Deformation in Iron
Abstract
The BCC-FCC phase transformation in iron lies at the core of the unique properties of iron-based materials. This transformations, being a typical representative of the family of martensitic transformation, being a typical representative of the family of martensitic transformations (MT), has been studied for decades. Unlike most of the polymorphic transformations in solids, the MT is a diffusionless process involving a correlated motion of many atoms. One important aspect of such motion is the energetics of large-strain homogeneous lattice deformation. This contributes a local energy density of importance to interfacial energy and mobility, as well as the energetics of potential nonclassical nucleation mechanisms. The homogeneous deformation mechanism allows continuous crystallographic transition from initial to final phase. In the case of the BCC-FCC MT, a few homogeneous strain paths have been suggested. The simplest one, known as the Bain deformation, consists of a continuous expansion of the BCC lattice along one of the cubic axes with a contraction along the two others. Due to its simplicity, the mechanism is a very convenient tool of investigating the energetics of the transformation. Keywords: Martensite, Deformation, Bain deformation, Energetics, Molecular physics, Electronic calculations, Stoner model.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1989
- Accession Number
- ADA213801
Entities
People
- Genrich L. Krasko
- Gregory B. Olson