Effect of silicon addition on grain refinement of copper alloys
2003; Elsevier BV; Volume: 57; Issue: 15 Linguagem: Inglês
10.1016/s0167-577x(02)01211-9
ISSN1873-4979
AutoresKeiichiro Oishi, Isao Sasaki, Junichi Otani,
Tópico(s)Aluminum Alloy Microstructure Properties
ResumoThe influence of additional elements on grain refinement of copper alloys was considered. It was found that the addition of silicon to Cu–Zn alloys increases number of nucleation sites, and the addition of minute amounts of cobalt to Cu–Zn–Si alloys inhibits grain growth. Exploiting these effects, a Cu–10Zn–2.0Si–0.1Co alloy with fine grains of approximately 1.6 μm was obtained. The increase in the number of nucleation sites is considered to be due to the decreasing stacking fault energy upon the addition of silicon. Inhibition of grain growth is considered to be due to the formation of fine precipitates upon the addition of cobalt.
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