Kinetic modeling of solid-state partitioning phase transformation with simultaneous misfit accommodation
Kinetic modeling of solid-state partitioning phase transformation with simultaneous misfit accommodation
复制标题
同时失配调节的固态分配相变的动力学模型
DOI：
10.1016/j.actamat.2016.02.010
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发表时间：
2016-04
期刊：
影响因子：
9.4
通讯作者：
Liu Feng
中科院分区：
文献类型：
--
作者：
Song Shaojie;Liu Feng
考虑球形错配析出相向有限弹性-理想塑性过饱和基体中的生长，建立了这种固态配分相变的动力学模型，分析了界面迁移、溶质扩散和错配调节的相互作用.界面迁移和溶质扩散之间的联系通过界面组成和界面速度进行，它们对错配调节的影响主要表现在有效的相变应变，这取决于瞬时组成场和沉淀物尺寸。以Fe-0.5at.%的二元合金为例，以等温和连续冷却条件下的C合金为例，讨论了错配调节对界面迁移和溶质扩散耦合的影响。对于等温转变，发现机械和化学驱动力之间的平衡影响，使得混合模式转变动力学相对于有效失配应变的弹塑性适应不敏感。与等温过程不同，在连续冷却条件下，错配调节对固态配分相变动力学的影响主要表现在相变起始温度和热力学平衡成分的大幅度降低。用本动力学模型预测了Fe-0.47at.%的γ/α相变C合金进行了冷却速率为10 K min− 1，并取得了良好的一致性。
Considering a spherical misfitting precipitate growing into a finite elastic-perfectly plastic supersaturated matrix, a kinetic modeling for such solid-state partitioning phase transformation is presented, where the interactions of interface migration, solute diffusion and misfit accommodation are analyzed. The linkage between interface migration and solute diffusion proceeds through interfacial composition and interface velocity; their effects on misfit accommodation are mainly manifested in an effective transformation strain, which depends on instantaneous composition field and precipitate size. Takingγtoαtransformation of a binary Fe-0.5 at.% C alloy under both isothermal and continuous cooling conditions as examples, the effects of misfit accommodation on the coupling interface migration and solute diffusion are well evaluated and discussed. For the isothermal transformation, a counterbalancing influence between mechanical and chemical driving forces is found so that the mixed-mode transformation kinetics is not sensitive with respect to the elastic–plastic accommodation of the effective misfit strain. Different from the isothermal process, during the continuous cooling condition, the effects of misfit accommodation on the kinetics of solid-state partitioning phase transformation are mainly manifested in the great decrease of the transformation starting temperature and the thermodynamic equilibrium composition. The present kinetic modeling was applied to predict the experimentally measuredγ/αtransformation of Fe-0.47 at.% C alloy conducted with a cooling rate of 10 K min−1and a good agreement was achieved.
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影响因子：
4.1
作者：
T. Illingworth;I. Golosnoy
通讯作者：
T. Illingworth;I. Golosnoy
影响因子：
1.6
作者：
K. Lee;H. Lee;J. Lee
通讯作者：
K. Lee;H. Lee;J. Lee
DOI：
10.1146/annurev.ms.03.080173.001551
发表时间：
1973-08
期刊：
Annual Review of Materials Science
影响因子：
--
作者：
G. Meyrick;G. W. Powell
通讯作者：
G. Meyrick;G. W. Powell
影响因子：
15.1
作者：
A. G. Khachaturi︠a︡n
通讯作者：
A. G. Khachaturi︠a︡n
DOI：
10.1007/bf02675557
发表时间：
1992-03
期刊：
Metallurgical Transactions A
影响因子：
--
作者：
B. W. Leitch;M. Puls
通讯作者：
B. W. Leitch;M. Puls