Title of article :
Ultrasound-induced equiaxial flower-like CuZn5/Al composite microstructure formation in Al/Zn–Al/Cu joint
Author/Authors :
Xiao، نويسنده , , Yong and Ji، نويسنده , , Hongjun and Li، نويسنده , , Mingyu and Kim، نويسنده , , Jongmyung، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2014
Pages :
5
From page :
135
To page :
139
Abstract :
Evolutions of the microstructure and properties of Al/Zn–Al/Cu joints exposed to ultrasonic waves during solidification were investigated. An anisotropic microstructure was exhibited in the joint without ultrasonic treatment during solidification. However, a homogeneous microstructure displayed with equiaxial flower-like CuZn5/Al composites interspersed with refined α-Al grains and Zn–Al eutectics was obtained in the joint treated with ultrasound during solidification. The CuZn5 flower showed an isotropic growth from a CuZn5 “shell” on a α-Al nucleus, and the formation was ascribed to the combined effects of ultrasound-induced erosion of base metals and ultrasound-aided grain refinement. Compared with the joint without ultrasonic treatment, the interlayer in the ultrasound-treated joint showed a 26.17% increase in hardness and a 37.99% decrease in the coefficient of thermal expansion (CTE).
Keywords :
Ultrasound-assisted brazing , Al/Cu composite substrate , Coefficient of thermal expansion , CuZn5 flower , Hardness
Journal title :
MATERIALS SCIENCE & ENGINEERING: A
Serial Year :
2014
Journal title :
MATERIALS SCIENCE & ENGINEERING: A
Record number :
2174722
Link To Document :
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