Effect of Small Addition of Sc on the Microstructural Evolution in Al-15Ag Alloy

作     者：Zhiguo CHEN Ziqiao ZHENG Simon P.Ringer 

作者机构：School of Materials Science and Engineering Central South University Changsha 410083 China Australian Key Centre for Microscopy & Microanalysis The University of Sydney 2006 NSW Australia 

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

年 卷 期：2005年第21卷第5期

页      面：630-634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：the Doctorate Foundationof National Education Ministry of China under grant.No.20040533022 

主　　题：Aluminium alloys Ageing Microstructure Scandium 

摘      要：The effect of small addition of Sc on the microstructural evolution in Al-15Ag alloy was investigated by Monte Carlo simulation and transmission electron microscopy （TEM）. Monte Carlo simulation results indicate that Ag clustering is suppressed by the addition of Sc during the initial ageing stage, and there is a little chemical repulsion between Ag atoms and Sc atoms. TEM observations show that the morphology of γ′ precipitation can be modified by the small addition of Sc, which does result in a refinement of γ′ precipitates in Al-15Ag-0.2Sc. The mechanism by which trace Sc affect the microstructure is to reduce the ledge density of γ′precipitates.