ZHANG Sanhong HE Xinlai CHU Youyi~* KE Jun University of Science and Technology Beijing
,
Beijing
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China lecturer
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Department of Materials Physics
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University of Science and Technology Beijing
,
Beijing 100083
,
China
金属学报(英文版)
The behaviour of baron segregation at grain boundaries in Fe-3% Si has been studied by means of particle tracking autoradiography(PTA).The results indicate that the tendency of equilibrium segregation of B at grain boundaries in Fe-3% Si is higher than that in austenitic alloys.No observable nonequilibrium segregation of B at grain boundaries was revealed in Fe-3% Si alloy during cooling and isothermal holding.The binding energy between boron at- oms and grain boundaries is 55.7±1.7 kJ/mol.Based on the complex mechanism of B segre- gation of quenching-induce-nonequilibrium segregation,different behaviours of B segrega- tion in γ-Fe and bcc Fe-3% Si alloy were discussed.
关键词:
Boron
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