Evolution of the mixed-mode character of solid-state phase transformations in metals involving solute partitioning

被引：0
作者：
Sietsma, Jilt [1 ]
Mecozzi, M. Giuseppina [1 ,2 ]
Bohemen, Stefan M. C. Van [1 ,3 ]
Zwaag, Sybrand Van Der [3 ]
机构：
[1] Dept. of Materials Science and Engineering, Delft University of Technology, Rotterdamseweg 137, Delft
[2] Netherlands Institute for Metals Research, Delft
[3] Dept. of Aerospace Engineering, Delft University of Technology, Delft
来源：
International Journal of Materials Research | 2022年 / 97卷 / 04期
关键词：
Mixed-mode character; Solid-state phase transformation; Solute partitioning;
D O I：
10.3139/ijmr-2006-0059
中图分类号：
学科分类号：
摘要：
Partitioning phase transformations in the solid state are principally subjected to two processes that take place: the redistribution, through long-range diffusion, of the partitioning element, and the lattice transformation taking place at the interface. Consequently, the usual approximation to consider one of these two processes as controlling the rate of the phase transformation is of limited accuracy. For a more accurate description, the so-called mixed-mode character of partitioning phase transformations is to be taken into account. In the present study, it is shown that the mixed-mode character can be quantified and that it has a significant effect on the kinetics. By means of examples involving either substitutional (Mo in Ti) or interstitial (C in Fe) partitioning elements, it is shown that a gradual change of the character of the transformation occurs during the phase transformation, shifting from initially interface-controlled (which implies the largest interface velocity) towards more diffusion-controlled. © 2006 Carl Hanser Verlag, München.
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页码：356 / 361
页数：5
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