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

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

Content Provider	MDPI
Author	Brika, Salah Eddine Brailovski, Vladimir
Copyright Year	2020
Description	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.
Starting Page	107
e-ISSN	25044494
DOI	10.3390/jmmp4040107
Journal	Journal of Manufacturing and Materials Processing
Issue Number	4
Volume Number	4
Language	English
Publisher	MDPI
Publisher Date	2020-11-09
Access Restriction	Open
Subject Keyword	Journal of Manufacturing and Materials Processing Manufacturing Engineering Laser Powder Bed Fusion Particle Size Distribution Particle Sphericity Ti-6al-4v Powder Flowability Fatigue Mechanical Properties Static Mechanical Properties
Content Type	Text
Resource Type	Article

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