Orientation gradients in rapidly solidified pure aluminum thin films: comparison of experiments and phase-field crystal simulations

Abstract

Rapid solidification experiments on thin film aluminum samples reveal the presence of lattice orientation gradients within crystallizing grains. To study this phenomenon, a single-component phase-field crystal (PFC) model that captures the properties of solid, liquid, and vapor phases is proposed to model pure aluminium quantitatively. A coarse-grained amplitude representation of this model is used to simulate solidification in samples approaching micrometer scales. The simulations reproduce the experimentally observed orientation gradients within crystallizing grains when grown at experimentally relevant rapid quenches. We propose a causal connection between formation of defects and orientation gradients.

References in corpus (2)

• Renormalization group theory for the phase field crystal equation
• New density functional approach for solid-liquid-vapor transitions in pure materials

Cited by in corpus (6)

• Grain growth competition during melt pool solidification -- Comparing phase-field and cellular automaton models
• Coarse-grained modeling of crystals by the amplitude expansion of the phase-field crystal model: an overview
• Multiscale analysis of crystal defect formation in rapid solidification of pure aluminium and aluminium-copper alloys
• Amplitude expansion of the phase-field crystal model for complex crystal structures
• Magnetic APFC modeling and the influence of magneto-structural interactions on grain shrinkage
• Mesoscale modeling of deformations and defects in thin crystalline sheets