The stability of deformation twins in aluminum enhanced by alloying elements

作     者：Linghong Liu Jianghua Chen Touwen Fan Shunli Shang Qinqin Shao Dingwang Yuan Yu Dai 

作者机构：Center for High-Resolution Electron MicroscopyCollege of Materials Science and EngineeringHunan UniversityChangsha410082China College of ScienceCentral South University of Forestry and TechnologyChangsha410004China Department of Materials Science and EngineeringThe Pennsylvania State UniversityUniversity ParkPA16802USA Advanced Corporation for Materials&EquipmentChangsha410111China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2019年第35卷第11期

页      面：2625-2629页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported financially by the National Natural Science Foundation of China (Nos.51701243,11427806,51471067 and 51371081) the Hunan Provincial Natural Science Foundation of China (No.2019JJ40544) the Specialized Research Found for the Doctoral Program of Higher Education of China (No. 20120161110036) the National Basic Research (973) Program of China (No.2009CB623704) the PhD Research Startup Foundation of Central South University of Forestry and Technology (No. 2017YJ020) the supercomputer TH-1A installed at Hunan University 

主　　题：Twins Twin boundary energy Al alloy First-principles calculations 

摘      要：Introducing and stabilizing twins in aluminum is a challenge for metals research due to their high formation *** first-principles calculations,we investigated the twin boundary segregation of alloying elements and their impact on the twin boundary energy in *** elements with small solubilities but strong interaction with twin boundary would significantly reduce twin boundary energies in aluminum at low *** increasing temperature,their segregation near twin boundary weakens,leading to their influence on twin boundary energies *** elements with large solubilities may greatly reduce the twin energies not only at low temperatures but also at high *** on careful analysis of charge density and atomic radius,it has been found that chemical difference has little influence on twin boundary energy whereas the atomic size effect plays a leading role in causing the change of twin boundary energy.