20 citations · 58 across the 10 of their papers we have counts for
10 papers
The structure and migration of twin boundaries in tetragonal -Sn: an application of machine learning based interatomic potentials
Ian Chesser, Mashroor Nitol, Esther C. Hessong +7
Although atomistic simulations have contributed significantly to our understanding of twin boundary structure and migration in metals and alloys with hexagonal close packed (HCP) c…
Energetics of the nucleation and glide of disconnection modes in symmetric tilt grain boundaries
Himanshu Joshi, Ian Chesser, Brandon Runnels +1
GBs evolve by the nucleation and glide of disconnections, which are dislocations with a step character. In this work, motivated by recent success in predicting GB properties such a…
Kinetic and Equilibrium Shapes of Cylindrical Grain Boundaries
Anqi Qiu, Caihao Qiu, Ian Chesser +3
In this work, we investigate the shape evolution of rotated, embedded, initially cylindrical grains (with [001] cylinder axis) in Ni under an applied synthetic driving force via mo…
The structure and migration of heavily irradiated grain boundaries and dislocations in Ni in the athermal limit
Ian Chesser, Peter M. Derlet, Avanish Mishra +6
The microstructural evolution at and near pre-existing grain boundaries (GBs) and dislocations in materials under high radiation doses is still poorly understood. In this work, we…
Atomistic modeling of metal-nonmetal interphase boundary diffusion
Ian Chesser, Raj Koju, Akshay Vellore +1
Atomistic computer simulations are applied to investigate the atomic structure, thermal stability, and diffusion processes in Al-Si interphase boundaries as a prototype of metal-ce…
On the Variability of Grain Boundary Mobility in the Isoconfigurational Ensemble
Anqi Qiu, Ian Chesser, Elizabeth Holm
Recent grain growth experiments have revealed that the same type of grain boundary can have very different mobilities depending on its local microstructure. In this work, we use mo…
Point defect avalanches mediate grain boundary diffusion
Ian Chesser, Yuri Mishin
Grain boundary (GB) diffusion in polycrystalline materials is a physical phenomenon of great fundamental interest and practical significance. Although the accelerated ("short circu…
A taxonomy of grain boundary migration mechanisms via displacement texture characterization
Ian Chesser, Brandon Runnels, Elizabeth Holm
Atomistic simulations provide the most detailed picture of grain boundary (GB) migration currently available. Nevertheless, extracting unit mechanisms from atomistic simulation dat…
Optimal transportation of grain boundaries: A forward model for predicting migration mechanisms
Ian Chesser, Elizabeth Holm, Brandon Runnels
It has been hypothesized that the most likely atomic rearrangement mechanism during grain boundary (GB) migration is the one that minimizes the lengths of atomic displacements in t…
Understanding the anomalous thermal behavior of sigma 3 grain boundaries in a variety of FCC metals
Ian Chesser, Elizabeth Holm
We present a case study of the complex temperature dependence of grain boundary mobility. The same general incoherent twin boundary in different FCC metals is found to display anti…