Fenghui AN
金属学报(英文版)
Hot deformation of Fe-3%Si alloy within the temperature range of 1073--1473 K and strain rate range of 0.01--5 s-1 was carried out by compression test. Optical microscopy (OM), electron backscattered diffraction (EBSD) and transmission electron microscopy (TEM) were used to characterize the deformation microstructure on various scales. Dynamic recovery is the dominant softening mechanism under all experimental conditions. A dynamic recovery region and partial dynamic recrystallization region can be distinguished according to Zener-Hollomon parameter (Z) based on OM observation. Furthermore, the quantitative description of subgrain size and boundary misorientation has been set up as a function of Zener-Hollomon parameter.
关键词:
Fe-3%Si
ZHANG Sanhong HE Xinlai CHU Youyi~* KE Jun University of Science and Technology Beijing
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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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null
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