Flowability of steel and tool steel powders: A comparison between testing methods

Marchetti, Lorenzo; Hulme-Smith, Christopher

doi:10.1016/j.powtec.2021.01.074

Cited by 42 publications

(25 citation statements)

References 56 publications

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“…The flow of a powder is a complex phenomenon that is sensitive to properties of the powder itself and external factors such as humidity. Within the powder, many parameters affect flow properties 11 . The main influencing factors are particle size and particle shape and shape and width of particle size distribution 12–15 .…”

Section: Theoretical Background—characterization Of Flow Properties O...mentioning

confidence: 99%

“…There are various parameters for describing the flow properties of a bulk material and a number of measurement techniques. Marchetti and Hulme‐Smith 11 give a classification of flowability testing methods. There is a need in industry for a quick and reproducible method of measuring the flowability of bulk solids 18,19 …”

Section: Theoretical Background—characterization Of Flow Properties O...mentioning

confidence: 99%

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Flow properties of powdery or granular filling substances of dangerous goods packagings—Comparison of the measurement of the angle of repose and the determination of the Hausner ratio

et al. 2022

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To ensure safety when transporting dangerous goods, it is important to specify the flow properties of the respective solid filling substance of the packagings. For this purpose, the angle of repose is currently used for the UN approvals in Germany. Measurements were carried out on 12 powdery or granular substances applying the angle of repose measuring methods customary in the test centres. The results of the methods differ significantly from each other. In addition, some of the techniques cannot be applied for very cohesive or coarse‐grained materials. The results for the angle of repose show a strong scatter for some constellations (coefficient of variation more than 20%). Safety during transport of dangerous goods cannot be guaranteed with this currently practised system of measuring the angle of repose. As a consequence, an alternative parameter to characterize the flow properties of bulk materials should be used in the recognized test centers for dangerous goods packagings, such as the Hausner ratio. This approach leads to more precise test results for the substances examined (maximum coefficient of variation 2.8%). It also has advantages in terms of applicability and occupational safety. Since the flow properties are safety‐relevant, both in terms of mechanical safety and safety against the release of dangerous substances, the testing practice in the recognized test labs should be improved and standardized.

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Section: Theoretical Background—characterization Of Flow Properties O...mentioning

confidence: 99%

Section: Theoretical Background—characterization Of Flow Properties O...mentioning

confidence: 99%

Flow properties of powdery or granular filling substances of dangerous goods packagings—Comparison of the measurement of the angle of repose and the determination of the Hausner ratio

et al. 2022

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“…The ability of the powders to flow was determined by means of diverse indicators such as the flow rate, Hausner ratio, basic flowability energy (BFE), compressibility (CPS), major principal stress (MPS), angle of internal friction (AIF), flow factor (FF), angle of repose, specific energy (SE), and the unconfined yield stress (UYS). The interested reader could find further details about the powder testers and the different parameters in (Marchetti and Hulme-Smith, 2021;Schwedes, 2003;Castellanos et al, 2004;Lettieri and Macrì, 2016). Marchetti and Hulme-Smith (2021) demonstrated the existence of correlations between these different parameters to characterize powder flow.…”

Section: A Brief Critical Review On Powder Flowability Testersmentioning

confidence: 99%

“…The interested reader could find further details about the powder testers and the different parameters in (Marchetti and Hulme-Smith, 2021;Schwedes, 2003;Castellanos et al, 2004;Lettieri and Macrì, 2016). Marchetti and Hulme-Smith (2021) demonstrated the existence of correlations between these different parameters to characterize powder flow. They reported that, for cohesive powders, the Hall and Carney funnels are blocked, while the flowability indicator for these devices is the flow rate.…”

Section: A Brief Critical Review On Powder Flowability Testersmentioning

confidence: 99%

“…Recently, Marchetti and Hulme-Smith (2021) investigated the flowability of 11 metal powders with different properties and particle size distributions employing six different testers. The ability of the powders to flow was determined by means of diverse indicators such as the flow rate, Hausner ratio, basic flowability energy (BFE), compressibility (CPS), major principal stress (MPS), angle of internal friction (AIF), flow factor (FF), angle of repose, specific energy (SE), and the unconfined yield stress (UYS).…”

Section: A Brief Critical Review On Powder Flowability Testersmentioning

confidence: 99%

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The Sevilla Powder Tester: A Tool for Measuring the Flow Properties of Cohesive Powders at High Temperatures

Gannoun

Ebri

Pérez

et al. 2022

KONA

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Understanding the flowability of cohesive powders at high temperature is of great importance for many industrial applications where these materials are handled at harsh thermal conditions. For instance, the Calcium-Looping (CaL) process, involving the transport, storage and fluidization of limestone powders at high temperature, is being considered nowadays as a promising technology for thermochemical energy storage (TCES) in concentrated solar power plants (CSP). In this context, the High Temperature Seville Powder Tester (HTSPT) is presented in this work as a useful tool to analyze how the flow behavior of cohesive powders changes with temperature. The manuscript reviews the main results obtained so far using this novel apparatus. The change of powder cohesiveness and therefore of powder flowability as depending on temperature, particle size, material properties and nanosilica surface coating is illustrated.

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Physical Powder Characteristics and Additive Manufacturing

2024

Metallic Powders for Additive Manufacturing

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Flowability of steel and tool steel powders: A comparison between testing methods

Cited by 42 publications

References 56 publications

Flow properties of powdery or granular filling substances of dangerous goods packagings—Comparison of the measurement of the angle of repose and the determination of the Hausner ratio

Flow properties of powdery or granular filling substances of dangerous goods packagings—Comparison of the measurement of the angle of repose and the determination of the Hausner ratio

The Sevilla Powder Tester: A Tool for Measuring the Flow Properties of Cohesive Powders at High Temperatures

Physical Powder Characteristics and Additive Manufacturing

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