Effect of power ultrasound on microstructural characteristics and mechanical properties of Al81.3Sn12.3Cu6.4 monotectic alloy

作     者：Wei Zhai Hanman Liu Pengfei Zuo Xiannian Zhu Bingbo Wei 

作者机构：Northwestern Polytechnical University 

出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))

年 卷 期：2015年第25卷第5期

页      面：471-477页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0702[理学-物理学] 

基　　金：financially supported by National Natural Science Foundation of China (Nos.: 51327901, 51271150, 51201136 and 51471134) Fundamental Research Fund of Northwestern Polytechnical University (No.: JCQ01091) NPU Excellent Personnel Supporting Project of Ao Xiang New Star 

主　　题：Al-based alloy Power ultrasound Liquid phase separation Monotectic structure Mechanical properties 

摘      要：The liquid phase separation process and solidification process of ternary AlSnCumonotectic alloy was accomplished with a 20 kHz ultrasonic field in the power range up to 500 W.As ultrasound power rised,the coarse primary(Al) dendrites turned into fine equiaxed grains,whose size decreased by one order of magnitude as that during static solidification.Meanwhile,rather than pronounced segregation of large secondary(Sn) blocks in the alloy sample solidified under static condition,tiny secondary(Sn) droplets dispersed homogenously within the(Al)matrix in the presence of ultrasound.Under the highest ultrasound power of 500 W,the spherical ternary(Al + Sn + θ(AlCu)) monotectic cells formed.The refinement of primary(Al) dendrites and uniform distribution of secondary(Sn) droplets induced by power ultrasound result in the improvement of microhardness,wear resistance,compressive and yield strength of ternary AlSnCumonotectic alloy.