Prediction of vacancy formation energies at tungsten grain boundaries from local structure via machine learning method
Prediction of vacancy formation energies at tungsten grain boundaries from local structure via machine learning method
复制标题
通过机器学习方法从局部结构预测钨晶界的空位形成能
DOI:
10.1016/j.jnucmat.2021.153412
复制
发表时间:
2021-11
影响因子:
3.1
通讯作者:
Xuebang Wu
中科院分区:
文献类型:
--
作者:
Yuxuan Wang;Xiaolin Li;Xiangyan Li;Yuxiang Zhang;Yange Zhang;Yichun Xu;Yawei Lei;C.S. Liu;Xuebang Wu
Grain boundary (GB) plays a crucial role in the mechanical properties and irradiation resistance of nuclear materials. It is thus essential to understand and predict the defect properties near GBs. Here, we present a framework for predicting vacancy formation energy (E V f) near GBs in tungsten (W) by machine learning (ML) technique. The E V f values of 4496 atomic sites near 46 types of [001] symmetry tilt GB (STGB) in W are calculated as database and eight appropriate variables are selected to characterizing the surrounding atomic configuration and location of atomic sites. Via the support vector machine with the radial basis kernel function (RBF-SVM), the good predicted results of cross validation (CV) and generalized verification prove the suitability and effectiveness of the selected variables and RBF-SVM method. Beside, due to their big differences in dislocation arrangement and atomic configuration, the STGBs need to be divided into three types, high angle, low angle-I and low angle-II STGBs, for adopting the Separate CV, and their predicted accuracies were found to have big improvements. Because the present method adopts geometrical factors, such as spatial size characteristic, density and location, as descriptors for the ML analysis, it is robust and general to other materials such as α-Fe, and beneficial to predict and understand the vacancy formation near interfaces.
登录
查看更多内容
影响因子:
41.2
作者:
Sickafus, Kurt E.;Grimes, Robin W.;Uberuaga, Blas P.
通讯作者:
Uberuaga, Blas P.
影响因子:
13.6
作者:
Kiyohara S;Oda H;Miyata T;Mizoguchi T
通讯作者:
Mizoguchi T
DOI:
10.1088/0959-5309/52/1/315
发表时间:
1940
期刊:
--
影响因子:
--
作者:
W. Bragg
通讯作者:
W. Bragg
影响因子:
--
作者:
Burgers, JM
通讯作者:
Burgers, JM
影响因子:
3.1
作者:
Xiangyan Li;Wei Liu;Yichun Xu;C.S. Liu;Q.F. Fang;B.C. Pan;Jun-Ling Chen;G.-N. Luo;Zhiguang Wang
通讯作者:
Zhiguang Wang