Effect of 0.3% Sc on microstructure, phase composition and hardening of Al-Ca-Si eutectic alloys

作     者：Nikolay BELOV Evgenia NAUMOVA Torgom AKOPYAN Nikolay BELOV;Evgenia NAUMOVA;Torgom AKOPYAN

作者机构：National University of Science and Technology MISIS 4 Leninskiy pr. 4 Moscow 119049 Russia Institute of Russian Academy of Sciences A. A. Baikov Institute of Metallurgy and Material Science RASLeninskiy pr. 49 Moscow 119991 Russia 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2017年第27卷第4期

页      面：741-746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 by Russian Science Foundation(Grant No.14-19-00632) 

主　　题：Al-Ca-Si-Sc system alloy eutectic Al3Sc nanoparticles phase composition microstructure heat treatment hardening 

摘      要：The phase composition,microstructure and hardening of aluminum-based experimental alloys containing0.3%Sc,0?14%Si and0?10%Ca(mass fraction)were *** experimental study(electron microscopy,thermal analysis and hardnessmeasurements)was combined with Thermo-Calc software simulation for the optimization of the alloy *** wasdetermined that the maximum hardening corresponded to the annealing at300?350°С,which was due to the precipitation of Al3Scnanoparticles with their further *** alloys falling into the phase region(Al)+Al4Ca+Al2Si2Ca have demonstrated asignificant hardening *** ternary eutectic(Al)+Al4Ca+Al2Si2Ca had a much finer microstructure as compared to the Al?Sieutectic,which suggests a possibility of reaching higher mechanical properties as compared to commercial alloys of the *** commercial alloys of the A356type,the model alloy does not require quenching,as hardening particles are formed in thecourse of annealing of castings.