GRAIN-BOUNDARY PRECIPITATION UNDER IRRADIATION IN DILUTE BINARY ALLOYS |
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Authors: | S.H.Song Z.X.Yuan J.Liu R.G.Faulkner |
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Affiliation: | [1]SchoolofMaterialsandMetallurgy,WuhanUniversityofScienceandTechnology,Wuhan430081,China [2]InstituteofPolymerTechnologyandMaterialsEngineering,LoughboroughUniversity,Loughborough,Le-icestershireLE113TU,UK |
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Abstract: | Irradiation-induced grain boundary segregation of solute atoms frequently bring about grain boundary precipitation of a second phase because of its making the solubility limit of the solute surpassed at grain boundaries. Until now the kinetic models for irradiation-induced grain boundary precipitation have been sparse. For this reason, we have theoretically treated grain boundary precipitation under irradiation in dilute binary alloys. Predictions ofγ'-Ni3Si precipitation at grain boundaries ave made for a dilute Ni-Si alloy subjected to irradiation. It is demonstrated that grain boundary silicon segregation under irradiation may lead to grain boundaryγ'-Ni3 Si precipitation over a certain temperature range. |
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Keywords: | segregation precipitation grain boundary irradiation |
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