Second phase particles and particle stringers have strong influences on recrystallized grain structure and alloy performances. In this work, the effects of second phase particles on grain size and grain size distribution in the U-10 wt% Mo (U-10Mo) after hot rolling and annealing were investigated and quantified. The particle volume fraction (PVF), distribution, morphology, size, and the formation of stringers during hot rolling were all considered. The criteria for stringers were determined using the edge-constrained post-necking model. Potts Model simulations of recrystallization were performed on six captured U-10Mo microstructures deformed using Finite Element Modeling (FEM). The stringer volume fraction (SVF) was found to be higher for captured microstructures with higher particle aspect ratios. It was determined from these simulations that the recrystallized grain size decreases with increasing PVF and the variation in grain size increases with increasing SVF. The current study will assist in the optimization of U-10Mo processing parameters to account for the effects of the second phase particles that exist in the alloy.

第二相颗粒和颗粒桁条对再结晶晶粒结构和合金性能有很大的影响。在这项工作中，研究和量化了第二相颗粒对热轧和退火后U-10 wt％Mo（U-10Mo）中晶粒尺寸和晶粒尺寸分布的影响。均考虑了颗粒体积分数（PVF），分布，形态，尺寸以及热轧过程中桁条的形成。纵梁的标准是使用边缘约束的后颈缩模型确定的。对使用有限元建模（FEM）变形的六个捕获的U-10Mo微结构进行了Potts模型重结晶模拟。对于具有更高的颗粒纵横比的捕获的微结构，发现纵梁体积分数（SVF）更高。从这些模拟中可以确定，重结晶的晶粒尺寸随PVF的增加而减小，而晶粒尺寸的变化随SVF的增加而增大。当前的研究将有助于优化U-10Mo工艺参数，以说明合金中存在的第二相颗粒的影响。