Grain boundary migration in Fe-3wt%Si alloys

被引:21
作者
Furtkamp, M
Lejcek, P
Tsurekawa, S
机构
[1] Rhein Westfal TH Klinikum, Inst Met Kunde & Met Phys, D-52074 Aachen, Germany
[2] Acad Sci Czech Republ, Inst Phys, CZ-18040 Prague 8, Czech Republic
[3] Tohoku Univ, Fac Engn, Dept Machine Intelligence & Syst Engn, Lab Mat Design & Interface Engn, Sendai, Miyagi 98077, Japan
关键词
grain boundary migration; bicrystal experiments; Fe-3%Si alloy;
D O I
10.1023/A:1008660402916
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The studies of three different laboratories on grain boundary migration in Fe-3wt.%Si alloys are presented. In all cases bicrystal techniques employing capillarity as driving force were used. [100] tilt boundaries were studied in the temperature range from 1223 K to 1373 K, and [110] tilt boundaries in the range from 1220 K to 1625 K. Proportionality between grain boundary velocity and driving force was confirmed. All data fulfil a linear relation between activation enthalpies and logarithms of the pre-exponential factors, corresponding to a compensation temperature of 1386 K where all boundaries theoretically should possess the same mobility. A considerably lower activation enthalpy was found in one case for an asymmetrical grain boundary compared to the symmetrical boundary of the same misorientation. High values of activation enthalpy of migration were found for special [100] boundaries compared to general ones although an opposite tendency was also observed for [100] boundaries.
引用
收藏
页码:59 / 66
页数:8
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