University of Manchester

Porosity Study of High Speed Sintered Nylon-12 Parts

Zicheng Zhu

Scientific Case

Nowadays, manufacturing industries are undergoing significant transitions and transformations in terms of new emerging technologies and methods. Traditional manufacturing processes that were established decades ago are now being challenged by the continued emergence and growth of Additive Manufacturing technologies. High Speed Sintering (HSS), one of the most promising Additive Manufacturing processes for polymers, offers a good compromise between dimensional accuracy and mechanical performance whilst having the potential to achieve at least an order of magnitude higher production speed than other mainstream plastic additive manufacturing techniques. However, a major bottleneck for this technique to be widely adopted as a series production method is the lack of part quality consistency as the part quality is highly sensitive to the energy input. There has not yet been a thorough understanding of how part quality is affected by energy-related process parameters.
This study aims to investigate the influence of energy input on porosity and mechanical properties of High Speed Sintered nylon-12 parts through assessing morphology of internal pores. This will be achieved by undertaking systematic and quantitative research that will focus on testing, characterising and analysing key mechanical properties, energy input and the resulting porosity and part deficiencies. This study will provide a better understanding of the formation of pores and the effect of energy input on part quality, enabling parts with improved mechanical properties to be produced.

Experiment Design

Please find attached PDF file. This file (proposal) includes Abstract, Case for Support, Experiment Design and Sample Description & Experimental Safety.
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Nikon Custom 320kV Bay
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Xradia VersaXCT
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Sample & Safety

Please find attached PDF file.

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Project Report