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Flow properties of tool steel powders for selective laser melting -  influence of thermal and mechanical powder treatments
RISE - Research Institutes of Sweden, Swerea, Swerea IVF.
RISE - Research Institutes of Sweden, Swerea, Swerea IVF.ORCID iD: 0000-0001-6859-6830
RISE - Research Institutes of Sweden, Swerea, Swerea IVF.
RISE - Research Institutes of Sweden, Swerea, Swerea IVF.
2017 (English)In: Powder Metallurgy, ISSN 0032-5899, E-ISSN 1743-2901, 1-10 p.Article in journal (Refereed) In press
Abstract [en]

In powder bed fusion additive processes the flow properties of the powder influence the quality of the final component and the efficiency of the process. In this investigation an attempt is made to identify flowability indicators which can describe the flow performance of the powder during the powder layering (i.e. recoating) step; common to all powder bed fusion processes. To this end, shear tests were performed by means of a powder rheometer. Bulk density, flow function and degree of cohesion were measured. The results suggest that there is a good correlation between the aforementioned parameters and the flowability of the powder during SLM processing. In addition, it was found that thermal treatments and tumbling enhance flowability. Thermal treatments were performed at 150, 200 and 250°C for a period of 10 €…min and in air.

Place, publisher, year, edition, pages
Taylor and Francis Ltd. , 2017. 1-10 p.
Keyword [en]
Compressive strength; Heat treatment; Melting; Powders; Tool steel, Additive process; flow; Flow performance; Flow properties; Flowability; Good correlations; Powder rheometers; Selective laser melting, 3D printers
National Category
Materials Engineering Mechanical Engineering
Identifiers
URN: urn:nbn:se:ri:diva-30169DOI: 10.1080/00325899.2017.1344451Scopus ID: 2-s2.0-85023162684OAI: oai:DiVA.org:ri-30169DiVA: diva2:1129178
Available from: 2017-08-01 Created: 2017-08-01 Last updated: 2017-08-02Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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  • ieee
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  • en-US
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