| BEHAVIOUR OF BORON SEGREGATION AT GRAIN BOUNDARIES IN BCC Fe-3% Si ALLOY |
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| 作者姓名： | ZHANG Sanhong HE Xinlai CHU Youyi~* KE Jun University of Science and Technology Beijing Beijing China lecturer |
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| 作者单位： | ZHANG Sanhong HE Xinlai CHU Youyi~* KE Jun University of Science and Technology Beijing，Beijing，China lecturer，Department of Materials Physics，University of Science and Technology Beijing，Beijing 100083，China |
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| 摘 要： | The behaviour of baron segregation at grain boundaries in Fe-3% Si has been studied bymeans of particle tracking autoradiography(PTA).The results indicate that the tendency ofequilibrium segregation of B at grain boundaries in Fe-3% Si is higher than that in austeniticalloys.No observable nonequilibrium segregation of B at grain boundaries was revealed inFe-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.
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| 收稿时间： | 1993-12-25 |
| 修稿时间： | 1993-12-25 |
BEHAVIOUR OF BORON SEGREGATION AT GRAIN BOUNDARIES IN BCC Fe-3% Si ALLOY |
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| ZHANG Sanhong HE Xinlai CHU Youyi* KE Jun University of Science and Technology Beijing,Beijing,China lecturer,.BEHAVIOUR OF BORON SEGREGATION AT GRAIN BOUNDARIES IN BCC Fe-3% Si ALLOY[J].Acta Metallurgica Sinica(English Letters),1993,6(6):391-396. |
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| Authors: | ZHANG Sanhong HE Xinlai CHU Youyi KE Jun University of Science and Technology Beijing Beijing China lecturer |
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| Affiliation: | ZHANG Sanhong HE Xinlai CHU Youyi~ KE Jun University of Science and Technology Beijing,Beijing,China lecturer,Department of Materials Physics,University of Science and Technology Beijing,Beijing,China |
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| Abstract: | 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. |
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| Keywords: | Boron Fe-3%Si segregation grain boundary |
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