Controlling factors determining flowability of powders for additive manufacturing: A combined experimental and simulation study
Controlling factors determining flowability of powders for additive manufacturing: A combined experimental and simulation study
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DOI：
10.1016/j.powtec.2021.08.006
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发表时间：
2021-11
影响因子：
5.2
通讯作者：
Yufan Zhao;Yujie Cui;Y. Hasebe;Huakang Bian;K. Yamanaka;K. Aoyagi;Takehito Hagisawa;A. Chiba
中科院分区：
文献类型：
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作者：
Yufan Zhao;Yujie Cui;Y. Hasebe;Huakang Bian;K. Yamanaka;K. Aoyagi;Takehito Hagisawa;A. Chiba
粉末流动性影响增材制造过程中的动态粉末行为，并根据粒度分布、颗粒形态和表面特征而变化。本研究采用气体雾化（GA）、等离子雾化（PA）和等离子旋转电极工艺（PREP）制备了Inconel 718合金粉末。通过雪崩角对流动性进行实验评价。借助数值模拟，分析了粒度分布、颗粒形态和颗粒表面特征对流动性的单独影响。结果表明，三种粉末中PREP粉末的流动性最好。 PSD 略有不同，但这些差异对其流动性几乎没有影响。然而，PREP粉末优异的流动性归因于高颗粒球形度和薄的表面氧化膜。如果在处理过程中环境因素控制得当，PREP在流动性方面比GA和PA具有天然的优势。
Powder flowability affects dynamic powder behavior during additive manufacturing and varies depending on particle size distribution, particle morphology, and surface features. In this study, Inconel 718 alloy powders were prepared by gas atomization (GA), plasma atomization (PA), and plasma rotating electrode process (PREP). The flowability was experimentally evaluated by the avalanche angle. With the help of numerical simulations, the individual effects of particle size distribution, particle morphology, and particle surface features on flowability were analyzed. The results showed that the PREP powder possessed the best flowability among the three powders. The PSDs were slightly different, but these differences had almost no effect on their flowability. Nevertheless, the excellent flowability of the PREP powder was due to the high particle sphericity and the thin surface oxide film. If the environmental factors are well controlled during the handling, PREP has a natural advantage over GA and PA in terms of flowability.