Precipitation at faceting grain boundaries of Cu-Ni-Sn alloys

被引：29

作者：

Virtanen, P ^{[1
]}

Tiainen, T ^{[1
]}

Lepisto, T ^{[1
]}

机构：

[1] Tampere Univ Technol, Inst Sci Mat, FIN-33101 Tampere, Finland

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1998年 / 251卷 / 1-2期

关键词：

grain boundaries; Cu-Ni-Sn; facets; precipitation; segregation;

D O I：

10.1016/S0921-5093(98)00498-5

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of recrystallisation heat treatment on the microstructure of copper-nickel-tin alloys Cu-9Ni-6Sn and Cu-6Ni-7Sn was studied. Cold deformed wire material was recrystallised by a short term anneal at 850 degrees C, close to the solidus of the alloy. Non-cold deformed material was heat treated for up to 1 h at the same temperature range (T = 800-900 degrees C). Slow cooling of the alloys resulted in faceted grain boundaries. Planar precipitates of (Cu,Ni),Sn were detected at the facets. The present observations are discussed based on two possible explanations: the non-equilibrium segregation of alloying elements during cooling and the grain boundary shape modifications due to the precipitate growth. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：269 / 275

页数：7