Experimental observation and computer simulation on non-equilibrium grain-boundary segregation kinetics of phosphorus

被引：0
作者：
Li Li [1 ,2 ]
Li Qing-fen [1 ]
Liu Er-bao [1 ]
机构：
[1] Harbin Engn Univ, Sch Mech & Elect Engn, Harbin 150001, Heilongjiang, Peoples R China
[2] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China
来源：
JOURNAL OF MARINE SCIENCE AND APPLICATION | 2005年 / 4卷 / 01期
关键词：
steels; grain boundaries; segregation; computer simulation;
D O I：
10.1007/s11804-005-0048-6
中图分类号：
U6 [水路运输]; P75 [海洋工程];
学科分类号：
0814 ; 081505 ; 0824 ; 082401 ;
摘要：
An experimental study and computer simulation on non-equilibrium grain-boundary segregation kinetics and the critical time for phosphorus in 12Cr1 MoV steel(which is used in steam pipeline of ships} are put forward in this paper. The segregation level of phosphorus with solution temperature 1 050 degrees C at the isothermal holding temperature of 540 degrees C,haNe been measured at grain -boundaries. A non -equilibrium grain -boundary segregation kinetics curve of phosphorus is gi'en. The critical time for phosphorus non -equilibrium grain -boundary segregation is about 500 h at 540 degrees C for the experimental steel. Ten the holding time is longer than 1 500 degrees C, non -equilibrium segregation disappears and the level of segregation reaches full equilibrium. The simulation using the kinetic equations of non equilibrium grain -boundary segregation is in good accordance with the experimental observation for phosphorus in steel 12Crl MOV. The non -equilibrium grain -boundary segregation kinetic model is therefore proved.
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页码：60 / 64
页数：5
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