TY - JOUR
T1 - Effect of power ultrasound on microstructural characteristics and mechanical properties of Al81.3Sn12.3Cu6.4 monotectic alloy
AU - Zhai, Wei
AU - Liu, Hanman
AU - Zuo, Pengfei
AU - Zhu, Xiannian
AU - Wei, Bingbo
N1 - Publisher Copyright:
© 2015 Chinese Materials Research Society.
PY - 2015/10/1
Y1 - 2015/10/1
N2 - The liquid phase separation process and solidification process of ternary Al81.3Sn12.3Cu6.4 monotectic alloy was accomplished with a 20kHz ultrasonic field in the power range up to 500W. 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 500W, the spherical ternary (Al+Sn+θ(Al2Cu)) 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 Al81.3Sn12.3Cu6.4 monotectic alloy.
AB - The liquid phase separation process and solidification process of ternary Al81.3Sn12.3Cu6.4 monotectic alloy was accomplished with a 20kHz ultrasonic field in the power range up to 500W. 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 500W, the spherical ternary (Al+Sn+θ(Al2Cu)) 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 Al81.3Sn12.3Cu6.4 monotectic alloy.
KW - Al-based alloy
KW - Liquid phase separation
KW - Mechanical properties
KW - Monotectic structure
KW - Power ultrasound
UR - http://www.scopus.com/inward/record.url?scp=84951287136&partnerID=8YFLogxK
U2 - 10.1016/j.pnsc.2015.10.006
DO - 10.1016/j.pnsc.2015.10.006
M3 - 文章
AN - SCOPUS:84951287136
SN - 1002-0071
VL - 25
SP - 471
EP - 477
JO - Progress in Natural Science: Materials International
JF - Progress in Natural Science: Materials International
IS - 5
ER -