Effect of Interfacial Structural Phase Transitions on the Coupled Motion of Grain Boundaries: A Molecular Dynamics Study

Abstract

In this work the coupled motion of two different phases of Σ5(210)[001] grain boundaries were investigated by molecular dynamics simulations of fcc Cu. The effect of interfacial structural phase transitions is shown to have a profound effect on both the shear strength and the nature of the coupled motion. Specifically, the motion of the two different phases is described by ideal coupling factors β<100> and β<110> that have different magnitudes and even signs. Additionally, the shear strength for the two inter- facial phases is observed to differ by up to 40 % at the lowest temperatures simulated. The study demonstrates that grain boundary phases transitions may have strong effects on the kinetics of microstructural evolution.

arXiv comment8 pages, 4 figures

References in corpus (2)

• Structural phase transformations in metallic grain boundaries
• Effect of interface phase transformations on diffusion and segregation in high-angle grain boundaries

Cited by in corpus (5)

• Grain-Boundary Kinetics: A Unified Approach
• Dual phase patterning during a congruent grain boundary phase transition in elemental copper
• Universality of grain boundary phases in fcc metals: Case study on high-angle [111] symmetric tilt grain boundaries
• Optimal transportation of grain boundaries: A forward model for predicting migration mechanisms
• Effect of the atomic structure of complexions on the active disconnection mode during shear-coupled grain boundary motion