High Speed Sintering: Assessing the influence of print density on microstructure and mechanical properties of nylon parts

Ellis, Adam; Noble, Christopher J.; Hopkinson, Neil

doi:10.1016/j.addma.2014.07.003

Cited by 38 publications

(25 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previous work has shown that as the amount of energy absorbed decreases the degree of particle melt is also reduced. 9 Thus, a reduced degree of particle melt will lead to a reduction in part density. Interestingly, the reverse effect is not observed, the highest print density did not correspond to the highest density.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Print Density on the Properties of High Speed Sintered Elastomers

Ellis

Hartley

Hopkinson

2015

Metall Mater Trans A

Self Cite

View full text Add to dashboard Cite

High Speed Sintering (HSS) is an Additive Manufacturing process that creates parts by combining inkjet printing and infra-red lamps rather than laser systems employed in Laser Sintering (LS). This research investigated the effects of altering the dosage of ink (via greyscale/dithering) on the properties of parts produced from elastomers. The results indicate that print density may be optimized to maximize mechanical properties and have achieved an elongation at break as high as 365%. The findings also open up the possibility of creating parts with added functionality. By using differing amounts of ink per layer it may be possible to create parts with varying properties throughout.

show abstract

Section: Resultsmentioning

confidence: 99%

“…This method is analogous to a previous method in which a more detailed explanation can be found. 9 It is important to note that on this scale of 0-255 a value of 0 represents black, a fully dense print, whereas 255 is white, no print at all. Thus, the greyscale value and amount of RAM deposited have an inverse relationship.…”

Section: Problem Definitionmentioning

confidence: 99%

Effect of Print Density on the Properties of High Speed Sintered Elastomers

Ellis

Hartley

Hopkinson

2015

Metall Mater Trans A

Self Cite

View full text Add to dashboard Cite

show abstract

“…A study by Ellis et al assessed the influence of print density on mechani cal properties of HSS nylon parts [6]. Other research concerning the HSS process include the study of excess powder hardness using nylon with HSS [7] and the effect of IR power level on sin tering behavior of Nylon-12 [8].…”

Section: Surface Preheatmentioning

confidence: 99%

Effect of Sintering Parameters and Flow Agent on the Mechanical Properties of High Speed Sintered Elastomer

Norazman

Hopkinson

2014

Journal of Manufacturing Science and Engineering

Self Cite

View full text Add to dashboard Cite

High speed sintering (HSS) is an additive manufacturing (AM) process that creates parts by sintering powder particles using inkjet and infrared (IR) lamp technology rather than laser systems employed in laser sintering (LS). This research investigated the effects o f machine parameters (lamp speed, bed temperature) and the addition o f fum ed silica flow agent on the tensile properties o f thermoplastic elastomer (TPE) parts processed using HSS. The results showed improved elongation at break (EaB) values by a factor o f more than 2 x compared to reported values fo r LS o f the same TPE. A t constant parameters, improved tensile strength and tensile modulus were observed with the addition o f flow agent into the sintering mixture.

show abstract

“…In general in all sintering processes the strength of the artefact depends directly on the strength of the necks of the molten material that solidifies between the powder particles during the process (Ellis et al, 2014). The parameters that mostly affect the strength of the sintered materials are the process temperature, pressure and time.…”

Section: Introductionmentioning

confidence: 99%