Modeling of isothermal solid-state precipitation using an analytical treatment of soft impingement

Modeling of isothermal solid-state precipitation using an analytical treatment of soft impingement
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使用软冲击分析处理进行等温固态沉淀建模

DOI:
10.1016/j.actamat.2008.04.053
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发表时间:
2008-09
期刊:
影响因子:
9.4
通讯作者:
Zhou YH
Zhou YH
中科院分区:
材料科学1区
文献类型:
--
作者:
Liu XN;Yang GC;Fan K;Liu F;Zhang YX;Zhou YH

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考虑了软撞击对降水的影响。在两阶段转变假设的基础上,建立了等温固相析出的物理现实分析模型。在模型中,假设了形核的位置饱和、各向同性的生长和浓度梯度的线性近似。得到了描述一维和三维沉淀的紧凑表达式。与Zener的模型相比,本模型可以给出一个类似的形式,但具有一个随时间变化的增长系数。针对模型应用,给出了模型参数的详细描述。在此基础上,对0.37C-1.45Mn-0.11V微合金钢中等温铁素体的形成和Al-0.2wt.%Sc合金中的析出进行了模型预测,与已发表的实验数据吻合较好。
The effects of soft impingement on precipitation are considered. On the basis of a two stage-transformation assumption, a physically realistic analytical model for isothermal solid-state precipitation has been developed. In the modeling, a site saturation of nucleation, an isotropic growth, and a linear approximation for the concentration gradient are assumed. A compact expression has been obtained to describe both one-dimensional and three-dimensional precipitations. Compared with Zener’s model, the present model can be given as an analogous form, but with a time-dependent growth coefficient. A detailed description for the model parameters has been given for the model application. On this basis, model predictions for isothermal ferrite formation in 0.37C–1.45Mn–0.11V micro-alloyed steel and precipitation in an Al–0.2wt.%Sc alloy have been performed; good agreement with the published experimental data has been achieved.
DOI: 10.1088/0953-8984/10/17/014
发表时间: 1998-05
期刊: Journal of Physics: Condensed Matter
影响因子: --
作者:
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