Microstructural refinement and performance improvement of Cu–36 wt% Zn alloy by Al2O3 nanoparticles coupling electromagnetic stirring

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

2 Scopus Citations
View graph of relations

Author(s)

Detail(s)

Original languageEnglish
Journal / PublicationRare Metals
Online published28 Apr 2016
Publication statusOnline published - 28 Apr 2016
Externally publishedYes

Abstract

Cu–36 wt% Zn alloy is widely used in valves of water and heating and auto parts, etc. Nevertheless, the structure is still coarse, and performances are much poor. The structure and performances of Cu–36 wt% Zn alloy were investigated by adding Al2O3 nanoparticles and stirring. Results indicate that by Al2O3 nanoparticles coupling electromagnetic stirring, the Cu–36 wt% Zn alloy with refined microstructure was successfully prepared. The average grain size is refined by 99 % compared with that without nanoparticles and stirring. The tensile strength (Rm ) and percentage elongation after fracture (A11.3 ) increase by 20.58 % and 19.40 %, respectively, compared with that without nanoparticles and stirring. Nanoparticles increase heterogeneous nucleation rate by 50 % compared with that without nanoparticles. The depth of dezincification layer decreases by 78.71 % compared with that without nanoparticles and stirring, as protective layer (Cu–Al2O3–Zn) is completely formed around the grain boundaries. © 2016 The Nonferrous Metals Society of China and Springer-Verlag Berlin Heidelberg

Research Area(s)

  • Al2O3 nanoparticles, Mechanical performance, Microstructural refinement, Rotating electromagnetic field