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Influence of Powder Particle Morphology on the Static and Fatigue Properties of Laser Powder Bed-Fused Ti-6Al-4V Components

Department of Mechanical Engineering, École de Technologie Supérieure, 1100 Notre-Dame Street West, Montreal, QC H3C 1K3, Canada
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J. Manuf. Mater. Process. 2020, 4(4), 107; https://doi.org/10.3390/jmmp4040107
Received: 18 September 2020 / Revised: 29 October 2020 / Accepted: 5 November 2020 / Published: 9 November 2020
In this work, two Ti-6Al-4V powder lots were produced using two different techniques: plasma atomization and gas atomization, with the first producing more spherical particles than the second. Testing specimens were then manufactured with these powder lots using an identical set of printing parameters and the same laser powder bed fusion system. Next, the porosity levels and distributions as well as the static and fatigue properties of the specimens from both powder lots were compared. Regarding the static mechanical properties, a noticeable difference was observed between the plasma-atomized powder specimens and their gas-atomized equivalents (7% greater ultimate and 4% greater yield strengths, but 3% lower elongation to failure, respectively). However, with regard to the fatigue resistance, the advantages of the plasma-atomized powder specimens in terms of their mechanical resistance were somewhat counterbalanced by the presence of pores aligned in the direction perpendicular to that of applied load. Conversely, specimens printed with the gas-atomized powder manifested a similar level of porosity, but a uniform pore distribution, which reduced the impact of the processing-induced porosity on fatigue cracks initiation and propagation. View Full-Text
Keywords: laser powder bed fusion; particle size distribution; particle sphericity; Ti-6Al-4V; powder flowability; fatigue mechanical properties; static mechanical properties laser powder bed fusion; particle size distribution; particle sphericity; Ti-6Al-4V; powder flowability; fatigue mechanical properties; static mechanical properties
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MDPI and ACS Style

Brika, S.E.; Brailovski, V. Influence of Powder Particle Morphology on the Static and Fatigue Properties of Laser Powder Bed-Fused Ti-6Al-4V Components. J. Manuf. Mater. Process. 2020, 4, 107. https://doi.org/10.3390/jmmp4040107

AMA Style

Brika SE, Brailovski V. Influence of Powder Particle Morphology on the Static and Fatigue Properties of Laser Powder Bed-Fused Ti-6Al-4V Components. Journal of Manufacturing and Materials Processing. 2020; 4(4):107. https://doi.org/10.3390/jmmp4040107

Chicago/Turabian Style

Brika, Salah E., and Vladimir Brailovski. 2020. "Influence of Powder Particle Morphology on the Static and Fatigue Properties of Laser Powder Bed-Fused Ti-6Al-4V Components" Journal of Manufacturing and Materials Processing 4, no. 4: 107. https://doi.org/10.3390/jmmp4040107

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