The multi-pass hot-rolling process of an annealed uranium–10 wt% molybdenum (U10Mo) coupon was studied by plane-strain compression finite element modeling. As-cast U10Mo typically contains second phase particles such as uranium carbides (UC) and silicides along the grain boundaries. The volume fraction of UC is typically large, while the other phases can be redissolved in the matrix by certain heat treatments. The UC particle distribution is important due to its influence on the recrystallization processes (particle stimulated nucleation) that occur during annealing between rolling passes. Unfavorable particle distribution and fracture after rolling can affect the grain size and also influence the fuel performance in the reactor. A statistical method, i.e., the two-point correlation function (2PCF), was used to analyze the carbide particle distribution after each rolling reduction. The hot rolling simulation results show that the alignment of UC particles along grain boundaries will rotate during rolling until it is parallel to the rolling direction, to form stringer-like distributions which are typically observed in rolled products that contain inclusions. 2PCF analysis shows that the interparticle spacing shrinks along the normal direction (ND) and increases along the rolling direction (RD). The simulated particle distribution is very similar to that measured experimentally for similar rolling reductions. The magnitudes of major peaks of 2PCF along the ND decrease after large reduction. The locations of major peaks indicate the inter-stringer distances. Many more small peaks appear for the 2PCF along the RD, and this is related to the neighboring particles within stringers, which are along the RD.

通过平面应变压缩有限元模型研究了退火的10wt％铀（U10Mo）铀试样的多道次热轧工艺。铸态的U10Mo通常沿晶界包含第二相颗粒，例如碳化铀（UC）和硅化物。UC的体积分数通常较大，而其他相可以通过某些热处理重新溶解在基质中。由于UC颗粒分布对轧制道次之间的退火过程中发生的重结晶过程（颗粒激发的成核）有影响，因此UC颗粒分布很重要。轧制后不利的颗粒分布和破裂会影响晶粒尺寸，还会影响反应堆中的燃料性能。一种统计方法，即两点相关函数（2PCF），用于分析每次压下后碳化物的颗粒分布。热轧模拟结果表明，在轧制过程中，UC粒子沿晶界的排列将旋转，直到与轧制方向平行为止，以形成通常在包含夹杂物的轧制产品中观察到的细条状分布。2PCF分析表明，颗粒间间距沿法线方向（ND）缩小，而沿滚动方向（RD）增大。模拟的颗粒分布与类似轧制压下率的实验测量非常相似。大幅度减小后，ND沿2PCF主峰的幅度减小。主峰的位置指示纵梁间距离。沿RD的2PCF出现更多的小峰，