A5015651019- Solidification and crystal growth phenomena
- Aluminum Alloy Microstructure Properties
- nanoparticles nucleation surface interactions
- High Temperature Alloys and Creep
- Metallic Glasses and Amorphous Alloys
- Radiative Heat Transfer Studies
- Spacecraft and Cryogenic Technologies
- Magnetic properties of thin films
- Electromagnetic Effects on Materials
- Cyclone Separators and Fluid Dynamics
- Scientific Research and Discoveries
- Physics of Superconductivity and Magnetism
- Phase Change Materials Research
- Thermal properties of materials
Max-Planck-Institut für Nachhaltige Materialien
2019
Indian Institute of Science Bangalore
1979-2018
Abstract Electroplasticity is defined as the reduction in flow stress of a material undergoing deformation on passing an electrical pulse through it. The lowering during pulsing has been attributed to combination three mechanisms: softening due Joule-heating material, de-pinning dislocations from paramagnetic obstacles, and electron-wind force acting dislocations. However, there no consensus literature regarding relative magnitudes reductions resulting each these mechanisms. In this paper,...
This review is on the phase field modelling studies in elastic stress effects microstructural instabilities. We will focus primarily four driven instabilities: (i) Spinodal separation; (ii) Particle splitting; (iii) Rafting; and, (iv) Asaro-Tiller-Grinfeld (ATG) organised as follows: Section 1, we briefly describe some of important and interesting experimental observations instabilities; 2, describe, reasonable detail, theoretical developments understanding instabilities solids. Both 1 2 are...
During solid–solid precipitation, interface free energy anisotropy is known to drive faceting of precipitates. In this paper, using a recently developed phase field formulation based on higher order tensor terms, we develop and implement family models indicate the parameter choices which lead faceted precipitate morphologies. We also how choose parameters given either morphology or interfacial anisotropy. Specifically, study precipitates in systems with cubic hexagonal anisotropies; 2 3D...
In epitaxially grown alloy thin films, spinodal decomposition may be promoted or suppressed depending on the sign of epitaxial strain. We study this asymmetry by extending Cahn's linear theory to systems with a composition dependent lattice parameter and modulus (represented Vegard's law coefficients, y, respectively), an imposed (epitaxial) strain (e). show analytically (and confirm using simulations) that asymmetric effect strains arises only in elastically inhomogeneous systems....
We use extended Cahn-Hilliard (ECH) equations to study faceted precipitate morphologies; specifically, we obtain four sided precipitates (in 2-D) and dodecahedron 3-D) in a system with cubic anisotropy, and, six-sided 2-D, the basal plane), hexagonal dipyramids prisms systems anisotropy. Our listing of these ECH is fairly comprehensive complete (upto sixth rank tensor terms Taylor expansion free energy). also show how parameters that enter model are be obtained if either interfacial energy...