Synergistically Improved Mechanical Properties and Thermal Conductivity of Hypoeutectic AlSiNiFeMg Alloy Prepared by Ultrasonic-assisted Casting  

作　　者：ZHANG Wenda YUAN Xuan ZHOU Yuli ZHONG Gu BAI Peikang WANG Hongfu LIU Jun 张文达;钟鼓;白培康

机构地区：[1]School of Materials Science and Engineering,North University of China,Taiyuan 030051,China [2]Chinalco Materials Application Research Institute Co.,Ltd.,Suzhou Branch,Suzhou 215026,China [3]Department of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China [4]Standard&Quality Control Research Institute,Ministry of Water Resources,Hangzhou 310024,China [5]School of Mechanical Engineering,North University of China,Taiyuan 030051,China [6]Delta Aluminum Corporation in Zhaoqing,Zhaoqing 526029,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2024年第6期1565-1568,共4页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the Zhaoqing Xijiang Innovation and Entrepreneurship Team Project Funding of China(No.2017A0109004)。

摘　　要：We employed a melt ultrasonic treatment near the liquidus to prepare a high-thermal-conductivity Al-4Si-2Ni-0.8Fe-0.4Mg alloy.The influences of various ultrasonic powers on its microstructure,mechanical properties,and thermal conductivity were investigated.It is shown that near-liquidus ultrasonication significantly refines the alloy grains and eutectic structure,synergistically improving the alloy’s mechanical properties and thermal conductivity.Specifically,the grain size decreased by 84.5%from 941.4 to 186.2μm.Increasing the ultrasonic power improved the thermal conductivity of the alloy slightly and significantly enhanced its mechanical properties.At an ultrasonic power of 2100 W,the tensile strength,yield strength,elongation rate,and thermal conductivity were 216 MPa,142 MPa,6.3%,and 169 W/(m·k),respectively.

关 键 词：Al-Si alloy mechanical property thermal conductivity ultrasonic treatment SOLIDIFICATION microstructure 

分 类 号：TG146.21[一般工业技术—材料科学与工程]