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BEHAVIOUR OF BORON SEGREGATION TO GRAIN BOUNDARIES IN BCC Fe-3%Si ALLOY |
HE Xinlai;CHU Youyi;KE Jun University of Science and Technology BeijingZHANG Sanhong;Department of Materials Physics;University of Science and Technology Beijing;Beijing 100083 |
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Cite this article:
HE Xinlai;CHU Youyi;KE Jun University of Science and Technology BeijingZHANG Sanhong;Department of Materials Physics;University of Science and Technology Beijing;Beijing 100083. BEHAVIOUR OF BORON SEGREGATION TO GRAIN BOUNDARIES IN BCC Fe-3%Si ALLOY. Acta Metall Sin, 1993, 29(6): 1-7.
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Abstract Behaviour of B segregation to grain boundaries in Fe-3% Si alloy has beenstudied by means of particle tracking autoradiography. Results indicate that B tends to equi-librium segregation to grain boundaries in Fe-3% Si higher than in austenitic alloys. No ob-servable nonequilibrium segregation of B to grain boundaries was revealed in Fe-3% Si alloyduring cooling and isothermal holding. The binding energy between B atoms and grainboundaries is 55.7±1.7 kJ/mol. Based on the complex mechanism of quenching-induce-nonequilibrium segregation, different behaviours of B segregation in γ-Fe and b.c.c.Fe-3% Si alloy were discussed.
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Received: 18 June 1993
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