Abstract A new technique to calculate spatial variations of grain shape, grain size, and grain boundary curvature in the fusion zone (FZ) of refractory metal alloys has been developed. This technique was applied to quantitatively evaluate changes in microstructures of simulated molybdenum welds available in the literature. Use of this technique showed that a 50% increase in weld speed more than doubled the fraction of grain segments oriented between 0° and 30° to the normal to the weld direction along with a decrease in grain size from approximately 120 µm to 84 µm in the weld direction at the FZ centerline.

中文翻译：

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焊缝显微组织的定量表征

摘要 开发了一种计算难熔金属合金熔合区（FZ）中晶粒形状、晶粒尺寸和晶界曲率空间变化的新技术。该技术用于定量评估文献中可用的模拟钼焊缝的微观结构变化。使用该技术表明，焊接速度增加 50%，与焊接方向法线方向成 0° 到 30° 的晶粒部分的比例增加了一倍以上，同时晶粒尺寸从大约 120 µm 减小到 84 µm。 FZ 中心线处的焊接方向。