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Non-equilibrium grain boundary segregation of phosphorous during high temperature plastic deformation

Chen Xian-Miao Song Shen-Hua

Non-equilibrium grain boundary segregation of phosphorous during high temperature plastic deformation

Chen Xian-Miao, Song Shen-Hua
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  • Received Date:  30 December 2008
  • Accepted Date:  05 March 2009
  • Published Online:  21 December 2009

Non-equilibrium grain boundary segregation of phosphorous during high temperature plastic deformation

  • 1. 哈尔滨工业大学深圳研究生院材料科学与工程系,深圳 518055

Abstract: The quasi-thermodynamics and the kinetics of deformation-induced non-equilibrium grain boundary segregation are described. This model is used to predict non-equilibrium segregation of P during high temperature plastic deformation in an austenite microstructure. There is a segregation concentration peak of P near 800 ℃ for a strain rate of 1×10-3 s-1 and the deformation magnitude is 20%. When the deformation reaches 20% in magnitude at 1000 ℃ the segregation of P at grain boundaries increases with increasing strain rate. The predictions are generally consistent with some available experimental observations.

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