41 citations · 88 across the 8 of their papers we have counts for
8 papers
A Continuum Model for Dislocation Climb
Chutian Huang, Shuyang Dai, Xiaohua Niu +4
Dislocation climb plays an important role in understanding plastic deformation of metallic materials at high temperature. In this paper, we present a continuum formulation for disl…
A phase field model for the motion of prismatic dislocation loops by both climb and self-climb
Xiaohua Niu, Xiaodong Yan
We study the sharp interface limit and well-posedness of a phase field model for self-climb of prismatic dislocation loops in periodic settings. The model is set up in a Cahn-Hilli…
Well-posedness of a modified degenerate Cahn-Hilliard model for surface diffusion
Xiaohua Niu, Yang Xiang, Xiaodong Yan
We study the well-posedness of a modified degenerate Cahn-Hilliard type model for surface diffusion. With degenerate phase-dependent diffusion mobility and additional stabilizing f…
Phase field model for self-climb of prismatic dislocation loops by vacancy pipe diffusion
Xiaohua Niu, Yang Xiang, Xiaodong Yan
In this paper, we present a phase field model for the self-climb motion of prismatic dislocation loops via vacancy pipe diffusion driven by elastic interactions. This conserved dyn…
Dislocation dynamics formulation for self-climb of dislocation loops by vacancy pipe diffusion
Xiaohua Niu, Yejun Gu, Yang Xiang
It has been shown in experiments that self-climb of prismatic dislocation loops by pipe diffusion plays important roles in their dynamical behaviors, e.g., coarsening of prismatic…
A continuum model for distributions of dislocations incorporating short-range interactions
Xiaohua Niu, Yichao Zhu, Shuyang Dai +1
Dislocations are the main carriers of the permanent deformation of crystals. For simulations of engineering applications, continuum models where material microstructures are repres…
Dislocation climb models from atomistic scheme to dislocation dynamics
Xiaohua Niu, Tao Luo, Jianfeng Lu +1
We develop a mesoscopic dislocation dynamics model for vacancy-assisted dislocation climb by upscalings from a stochastic model on the atomistic scale. Our models incorporate micro…
Continuum dynamics of the formation, migration and dissociation of self-locked dislocation structures on parallel slip planes
Yichao Zhu, Xiaohua Niu, Yang Xiang
In continuum models of dislocations, proper formulations of short-range elastic interactions of dislocations are crucial for capturing various types of dislocation patterns formed…