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On the influence of inter-layer time and energy density on selected critical-to-quality properties of PA12 parts produced via laser sintering
- Source :
- Polymer Testing. 61:386-395
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- © 2017 Elsevier Ltd Laser Sintering (LS) of polymers is an Additive Manufacturing technique progressively used to produce functional parts. However, LS parts still present a certain quality variability. Efficient consolidation of the polymeric powder, necessary to obtain a dense part, mainly depends on the viscosity of the molten polymer and on the time given for the polymer to coalesce. The polymer viscosity is a function of the temperature and, consequently, of the energy density (ED) input by the laser. The sintering time strongly depends on the surface area to be laser-scanned in each layer, which in turn is strongly related to the product complexity and the number of parts within one build. The aim of this work is to investigate how this thermo-temporal effect, influenced by the ED and the inter-layer time, influences the resulting LS PA12 part quality at both micro-level (e.g., porosity, crystallinity) and macro-level (e.g., dimensional accuracy, mechanical performance). ispartof: POLYMER TESTING vol:61 pages:386-395 status: published
- Subjects :
- chemistry.chemical_classification
0209 industrial biotechnology
Materials science
Polymers and Plastics
Consolidation (soil)
Organic Chemistry
Sintering
02 engineering and technology
Polymer
021001 nanoscience & nanotechnology
Laser
law.invention
Crystallinity
Selective laser sintering
020901 industrial engineering & automation
chemistry
law
Critical to quality
Composite material
0210 nano-technology
Porosity
Subjects
Details
- ISSN :
- 01429418
- Volume :
- 61
- Database :
- OpenAIRE
- Journal :
- Polymer Testing
- Accession number :
- edsair.doi.dedup.....b87deaee6d770a8bf96a86d85771c47d
- Full Text :
- https://doi.org/10.1016/j.polymertesting.2017.05.027