Theoretical progress in non-equilibrium grain-boundary segregation (Ⅰ): Thermally induced non-equilibrium grain-boundary segregation and intergranular embrittlement

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作者：
XU TingDong WANG Kai SONG ShenHua Central Iron and Steel Research Institute Superalloy Department Beijing China Department of Materials Science and Engineering Shenzhen Graduate School Harbin Institute of Technology Shenzhen China [1 ,1 ,2 ,1 ,100081 ,2 ,518055 ]
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Science in China(Series E:Technological Sciences) | 2009年 / 52卷 / 04期
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摘要：
The research progress of non-equilibrium grain-boundary segregation theories in the last 20 years is reviewed. Based on studies by the present authors, the critical time of non-equilibrium segregation and its impact on the development of non-equilibrium segregation theories are described. Quasi- thermo- dynamics and kinetics for thermal non-equilibrium grain boundary segregation are detailed along with a non-equilibrium grain boundary cosegregation model. The experimental validation of the theories and their application to the reversible temper embrittlement of steels and the intermediate temperature brittleness in metals and alloys are also addressed.
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页码：893 / 905
页数：13
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