scholarly journals Phase field crystal simulation of the effect of temperature on low-angle symmetric tilt grain boundary dislocation motion

2019 ◽  
Vol 68 (17) ◽  
pp. 170504
Author(s):  
Ke-Wu Qi ◽  
Yu-Hong Zhao ◽  
Hui-Jun Guo ◽  
Xiao-Lin Tian ◽  
Hua Hou
Keyword(s):  
Grain Boundary ◽  
Phase Field ◽  
Dislocation Motion ◽  
Effect Of Temperature ◽  
Boundary Dislocation ◽  
Symmetric Tilt ◽  
Tilt Grain Boundary ◽  
Phase Field Crystal

scholarly journals Phase field crystal simulation of effect of misorientation angle on low-angle asymmetric tilt grain boundary dislocation motion

2020 ◽  
Vol 69 (14) ◽  
pp. 140504
Author(s):  
Ke-Wu Qi ◽  
Yu-Hong Zhao ◽  
Xiao-Lin Tian ◽  
Dun-Wei Peng ◽  
Yuan-Yang Sun ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Misorientation Angle ◽  
Phase Field ◽  
Dislocation Motion ◽  
Boundary Dislocation ◽  
Tilt Grain Boundary ◽  
Phase Field Crystal

Atomistic simulation of shear-coupled motion of [1 1 0] symmetric tilt grain boundary in α-iron

2018 ◽  
Vol 148 ◽  
pp. 141-148 ◽  
Author(s):  
Jian Yin ◽  
Yi Wang ◽  
Xiaohan Yan ◽  
Huaiyu Hou ◽  
Jing Tao Wang
Keyword(s):  
Grain Boundary ◽  
Atomistic Simulation ◽  
Coupled Motion ◽  
Symmetric Tilt ◽  
Tilt Grain Boundary

Fractional phase-field crystal modelling: analysis, approximation and pattern formation

2020 ◽  
Vol 85 (2) ◽  
pp. 231-262
Author(s):  
Mark Ainsworth ◽  
Zhiping Mao
Keyword(s):  
Pattern Formation ◽  
Grain Boundary ◽  
Fractional Order ◽  
Phase Field ◽  
Boundary Energy ◽  
Classical Case ◽  
Experimental Measurements ◽  
Grain Boundary Energy ◽  
Material Interface ◽  
Phase Field Crystal

Abstract We consider a fractional phase-field crystal (FPFC) model in which the classical Swift–Hohenberg equation (SHE) is replaced by a fractional order Swift–Hohenberg equation (FSHE) that reduces to the classical case when the fractional order $\beta =1$. It is found that choosing the value of $\beta $ appropriately leads to FSHE giving a markedly superior fit to experimental measurements of the structure factor than obtained using the SHE ($\beta =1$) for a number of crystalline materials. The improved fit to the data provided by the fractional partial differential equation prompts our investigation of a FPFC model based on the fractional free energy functional. It is shown that the FSHE is well-posed and exhibits the same type of pattern formation behaviour as the SHE, which is crucial for the success of the PFC model, independently of the fractional exponent $\beta $. This means that the FPFC model inherits the early successes of the FPC model such as physically realistic predictions of the phase diagram etc. and, therefore, provides a viable alternative to the classical PFC model. While the salient features of PFC and FPFC are identical, we expect more subtle features to differ. The prediction of grain boundary energy arising from a mismatch in orientation across a material interface is another notable success of the PFC model. The grain boundary energy can be evaluated numerically from the PFC model and compared with experimental measurements. The grain boundary energy is a derived quantity and is more sensitive to the nuances of the model. We compare the predictions obtained using the PFC and FPFC models with experimental observations of the grain boundary energy for several materials. It is observed that the FPFC model gives superior agreement with the experimental observation than those obtained using the classical PFC model, especially when the mismatch in orientation becomes larger.

Atomistic investigation of the effects of symmetric tilt grain boundary structures on irradiation response of the α-Fe containing carbon in solution

2019 ◽  
Vol 166 ◽  
pp. 82-95 ◽  
Author(s):  
Seyed Mehrdad Zamzamian ◽  
Seyed Amirhossein Feghhi ◽  
Mohammad Samadfam ◽  
Maryam Darvishzadeh
Keyword(s):  
Grain Boundary ◽  
Symmetric Tilt ◽  
Tilt Grain Boundary

Phase field crystal study of grain boundary structure and annihilation mechanism in low-angle grain boundary

2019 ◽  
Vol 129 ◽  
pp. 163-175 ◽  
Author(s):  
Huijun Guo ◽  
Yuhong Zhao ◽  
Yuanyang Sun ◽  
Jinzhong Tian ◽  
Hua Hou ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Phase Field ◽  
Boundary Structure ◽  
Grain Boundary Structure ◽  
Phase Field Crystal

Effect of zinc-doping on tensile strength of Σ5 bcc Fe symmetric tilt grain boundary

2020 ◽  
Vol 171 ◽  
pp. 109204 ◽  
Author(s):  
Wangjun Peng ◽  
Hao Peng ◽  
Guangxin Wu ◽  
Jieyu Zhang
Keyword(s):  
Tensile Strength ◽  
Grain Boundary ◽  
Symmetric Tilt ◽  
Zinc Doping ◽  
Tilt Grain Boundary
Sign in / Sign up

Export Citation Format

Share Document