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金属学报  1995, Vol. 31 Issue (3): 130-134    
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Bi偏聚对[001]对称倾侧Cu双晶晶界脆性的影响
李广海;张立德
中国科学院固体物理研究所
EFFECT OF Bi SEGREGATION ON GRAIN BOUNDARY EMBRITTLEMENT OF Cu BICRYSTALS WITH [001] SYMMETRICAL TILT BOUNDARIES
LI Guanghai; ZHANG Lide (Institute of Solid Siate Physics; Chinese Academy of Sciences;Hefei 230031 )
引用本文:

李广海;张立德. Bi偏聚对[001]对称倾侧Cu双晶晶界脆性的影响[J]. 金属学报, 1995, 31(3): 130-134.
, . EFFECT OF Bi SEGREGATION ON GRAIN BOUNDARY EMBRITTLEMENT OF Cu BICRYSTALS WITH [001] SYMMETRICAL TILT BOUNDARIES[J]. Acta Metall Sin, 1995, 31(3): 130-134.

全文: PDF(345 KB)  
摘要: 使用定向生长的[001]对称倾侧Cu双晶,研究了Bi偏聚对Cu双晶断裂行为和晶界脆性的影响.结果表明:Cu-Bi双晶的断裂行为和断裂应力强烈地依赖于晶界的取向差,而与晶界的重位点阵密度无关,其晶界脆性取决于未偏聚Cu双晶晶界的能量.晶界的能量越大,晶界脆性越强.这种依赖关系可由Bi在不同晶界的选择性偏聚解释.
关键词 Cu双晶[001]对称倾侧晶界Bi偏聚断裂应力晶界脆性    
Abstract:The effect of Bi segregation at grain boundary on the fracture behaviour and grain boundary embrittlement was studied by using orientationcontrolled Cu bicrystals with [001] symmetrical tilt boundary.The results indicate that the fracture behaviour and fracture stress of Cu-Bi bicrystals depend strongly on the misorientation, and the grain boundary embrittlement is not related to the density of coincidence site lattice of the grain boundary but to the unsegregated grain boundary energy. the higher the grain boundary energy- the stronger the grain boundary embrittlement. The dependence could be explained by considering the boundary-dependent segregation of Bi atoms.
Key words Cu bicrystal    [001] symmetrical tilt boundary    Bi segregation    fracture stress    grain boundary embrittlement
收稿日期: 1995-03-18     
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