Characterization of powder flow behavior for additive manufacturing

被引：33

作者：

Baesso, Ilaria ^{[1
]}

Karl, David ^{[2
]}

Spitzer, Andrea ^{[1
]}

Gurlo, Aleksander ^{[2
]}

Guenster, Jens ^{[1
]}

Zocca, Andrea ^{[1
]}

机构：

[1] Bundesanstalt Mat Forsch Prufung, Div Ceram Proc & Biomat, Berlin, Germany

[2] Tech Univ Berlin, Inst Mat Sci & Technol, Chair Adv Ceram Mat, Fachgebiet Keram Werkstoffe, Berlin, Germany

来源：

ADDITIVE MANUFACTURING | 2021年 / 47卷

关键词：

Powder flow; Flowability; Powder bed additive manufacturing; Powder rheology; FLOWABILITY; TESTERS;

D O I：

10.1016/j.addma.2021.102250

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The flow behavior of powders has an essential role in many industrial processes, including powder bed additive manufacturing. The characterization of the flow behavior is challenging, as different methods are available, and their suitability for an application in additive manufacturing is still controversial. In this study, six standardized methods (measurement of bulk density by ISO 60 and by ASTM B329, angle of repose by ISO 4324, discharge time by ISO 6186 and by ASTM B964-16, and Hausner Ratio by ASTM 7481-18), the rotating drum method (by GranuDrum) and powder rheometry (Anton Paar powder cell), were applied to five size fractions of a crushed quartz sand powder and compared. A statistical approach is proposed and discussed to correlate the obtained flowability indexes with the packing density of powder beds deposited layer-by-layer, and these correlations are compared between methods. Overall, the measurement of bulk density by ASTM B329 showed the best correlation with the powder bed density. Advanced methods such as the rotating drum method and powder rheometry did not demonstrate particularly good correlations, however they provided complementary information which can be useful to assess the dynamic behavior of powders.

引用

页数：14

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