TRACER DIFFUSION OF CARBON IN FE-NI-CR-C ALLOYS

被引：2
|
作者：
CERMAK, J [1 ]
MEHRER, H [1 ]
机构：
[1] ACAD SCI CZECH REPUBL,INST PHYS MAT,CR-61662 BRNO,CZECH REPUBLIC
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1994年 / 186卷 / 1-2期
关键词：
D O I：
10.1016/0921-5093(94)90317-4
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The diffusivity of C-14 in austenitic alloys Fe-19at.%Ni-11at.%Cr-xC (x=0.010, 0.047, 0.065, 0.130, 0.288 and 0.809 at.%) has been studied in the temperature interval from 773 to 1023 K using a serial sectioning method. It appears that the carbon diffusion coefficients D increase with increasing average carbon concentration in accordance with an analogous dependence reported in the literature for the case of non-alloyed austenite Fe-C. The variation in the diffusion characteristics with the composition is explained in terms of C trapping by Cr atoms, and in terms of a repulsive interaction between nearest-neighbour C pairs. An empirical relation for calculation of D at various temperatures and carbon concentrations is proposed.
引用
收藏
页码：171 / 175
页数：5
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