Non-equilibrium grain-boundary segregation of Bi in binary Ni(Bi) alloy

The minimum ductility of Ni(Bi) alloy caused by isothermal annealing at 750°C or 650°C is determined through tensile tests at room temperature. Tensile samples with minimum ductility display intergranular facets. Strong grain-boundary segregation of Bi in nanocrystalline Ni–Bi layer is observed by a...

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Bibliographic Details
Published in:Scripta materialia 2013-05, Vol.68 (10), p.825-828
Main Authors: Zheng, L., Chellali, M.R., Schlesiger, R., Meng, Y., Baither, D., Schmitz, G.
Format: Article
Language:English
Subjects:
Atom probe tomography
Bismuth
Grain-boundary segregation
Nickel alloy
Tensile test
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Summary:The minimum ductility of Ni(Bi) alloy caused by isothermal annealing at 750°C or 650°C is determined through tensile tests at room temperature. Tensile samples with minimum ductility display intergranular facets. Strong grain-boundary segregation of Bi in nanocrystalline Ni–Bi layer is observed by atom probe tomography. The minimum ductility, intergranular facets and grain-boundary segregation of Bi confirm the non-equilibrium grain-boundary segregation of Bi in Ni(Bi) alloy for the first time.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2013.02.002