论文标题
在不同的假设下，关于晶界特性的不同假设下的316升不锈钢晶粒生长的水平建模
Level-Set modeling of grain growth in 316L stainless steel under different assumptions regarding grain boundary properties
论文作者
论文摘要
在晶粒尺寸，平均值和直方图方面，比较了两个有限元级别集合（Fe-LS）制剂的晶粒生长模型。考虑了两种微观结构，有些是从EBSD图中统计生成的，而其他微观结构是通过将EBSD数据浸入FE公式中而产生的。晶界（GB）的迁移率异质地定义为GB迷失方向的函数。另一方面，GB能量被认为是异质性或各向异性的，分别定义为迷失方向的函数以及GB的不良反应和GB倾斜度。在平均晶粒尺寸值和晶粒尺寸分布（GSD）方面，这两个配方都提供了相似的响应。但是，各向异性配方更好地尊重实验性迷失方向分布函数（DDF），并预测更现实的谷物形态。还发现，用乙状结肠功能描述的异质GB迁移率仅影响谷物的DDF和形态。因此，感知到双边界（TBS）的发展较慢。
Two finite element level-set (FE-LS) formulations are compared for the modeling of grain growth of 316L stainless steel in terms of grain size, mean values and histograms. Two kinds of microstructures are considered, some are generated statistically from EBSD maps and the others are generated by immersion of EBSD data in the FE formulation. Grain boundary (GB) mobility is heterogeneously defined as a function of the GB disorientation. On the other hand, GB energy is considered as heterogeneous or anisotropic, respectively defined as a function of the disorientation and both the GB misorientation and the GB inclination. In terms of mean grain size value and grain size distribution (GSD), both formulations provide similar responses. However, the anisotropic formulation better respects the experimental disorientation distribution function (DDF) and predicts more realistic grain morphologies. It was also found that the heterogeneous GB mobility described with a sigmoidal function only affects the DDF and the morphology of grains. Thus, a slower evolution of twin boundaries (TBs) is perceived.
