休止角
材料科学
分形维数
球磨机
复合材料
形态学(生物学)
细度
粒径
分形
数学
化学工程
数学分析
遗传学
生物
工程类
作者
Dongdong Chen,Bowen Liu,Wei Xu,Ce Zhang,Enbo Guo,Jinchao Lu,Guyu Sun,Yu Pan,Jiazhen Zhang,Xin Lu
标识
DOI:10.1016/j.apt.2022.103803
摘要
The metal powder flowability determined by powder characteristics significantly influences on the final parts manufactured by additive manufacturing (AM). Among the characteristics, the individually effect of morphology on its flowability still is not comprehensively evaluated. In this study, the effect of morphology on the flowability of hydride-dehydrate titanium (HDH Ti) powder treated by high temperature ball milling (HTBM) was investigated systematically using the fractal dimension and shape factors, i.e., circularity, elongation, compactness and convexity. The results of HTBM show that the modified HDH Ti powder with a mass flow rate of 48.1 ± 0.3 s/50 g and the angle of repose (AOR) of 38.88 ± 0.5°. The fractal dimension of powder plays a main role on the flowability, which increase in the decrease of it. The box plot and Pearson correlation coefficient of shape factors indicate that only circularity is strong correlation with flowability, which increases with it. The regression model of flowability expressed with fractal dimension and circularity shows the adjusted R2 value of 0.991, which is good agreement with the experiment. Taken together, this study provides a general guide to evaluate the powder flowability based on the morphology.
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