·272· 北京科技大学学报 1998年第3期 8 Huaiyang Cui,Xinlai He,Jun Ke.Boron Segregation Near Moving Boundaries.Chinese Science Bulletion.1995,40:1652 9 Laasraoui A,Jonas J J.Recrystallization of Austenite After Deformation at High Temperatures and Strain Rate-analysis and Modeling.Met Trans,1991,22A:115 10 He X L,Chu Y Y.The Application of the B(n,a)'Li Fission Reaction to Study Boron Behaviour in Materials.J appl phys,1983,161:1145 11 Djaic R A,Jonas J J.Static Recrystallization of Austenite Between Intervals of Hot Working.J Iron &Stell Inst,1972,210:256 12 Hughes J O H,Rogers G T.High-resolution Autora-diagraphy of Trace Boron in Metals and Solids. J Inst Metals,1967,95:299 13 Cahn J W.The Impurity-drag Ettect in Grain Boundary Motion.Acta Metall,1962,10:789 14 Lucke K,Detert K.A Quantitative Theory of Grain-boundary Motion and Recrystallization in Metals in The Presence of Impurities.Acta Metall,1957,5:628 15 Lucke K,Stuwe H P.On the Theory of Impurity Controlled Grain Boundary Motion.Acta Metall, 1971,19:1087 Effect of Pre-deformation on Abnormal Segregation of Grain Boundary during Recrystallization Process Cao Bing He Xinlai Applied Science School UST Beijing.Beijing 100083.China ABSTRACT The softening rates of Fe-30%Ni alloy containing boron after 10%and 40%deformation at 1 000C have been measured by a method of interrupted compression, the recrystallization process has also been evaluated.The moving velocity of the boundary of new recrystallizing grain which was growing into the deformed grains has been calculat- ed semi-quantitatively.By means of PTA technique the abnormal segregation phenomenon on the moving boundary during recrystallization and the influence of pre-deformation have been investigated and the amount of B segregation on moving grain boundaries has been measured.Results indicate that the abnormal segregation of boundaries,when the new grains are growing,is concerned with the pre-deformation and the moving velocity of the bourdaries.This phenomenon is discussed by the grain boundary widening mechanism. KEY WORDS boron;pre-deformation;recrystallization;boundary segregation