Misorientation dependence of intergranular embrittlement of Cu-2.0 wt.% Sb bicrystals

[摘要] Bicrystals of a Cu-2.0 wt.% Sb alloy with different [001] symmetric tilt boundaries were tensile tested at several temperatures from 77 to 743 K. The dependence of Sb segregation level at [001] tilt boundaries on the misorientation angle also was examined by energy-dispersive X-ray spectroscopy. The fracture behavior was sensitive to the misorientation angle and test temperature. Both the fracture behavior at 77 K and the Sb segregation level showed a good correlation with the gram-boundary energy of pure Cu. The higher the grain-boundary energy, the higher the Sb segregation level and the higher the degree of grain-boundary embrittlement. (C) 2004 Elsevier B.V. All rights reserved.

[发布日期] 2004-12-15

[效力级别]  Proceedings Paper

[关键词] embrittlement;segregation;[001] symmetric tilt boundary;Cu-Sb bicrystal;intergranular fracture