InImpact: The Journal of Innovation Impact

Publisher Future Technology Press
Vol. 8 No. 2 KES Transactions on SDM II - Sustainable Design and Manufacturing 2015
Volume Editors KES International
Journal ISSN 2051-6002
Article TitleAn Investigation into the Recycling of Ti-6Al-4V Powder Used Within SLM to Improve Sustainability
Primary AuthorRichard O'Leary, Cardiff University
Other Author(s) Rossi Setchi; Paul Prickett; Gareth Hankins
Pages 377 - 388
Article ID sdm15-038
Publication Date 02-May-16

This paper considers the steps to be taken in investigating the effects of recycling Ti-6Al-4V powders for Selective Laser Melting (SLM). A research methodology is presented that shall allow for investigation in to the change in powder characteristics through repeated use, and will provide the basis for eventual determination of any effect that these changes have on the chemical, mechanical and metallurgical properties of laser melted parts. An in depth understanding of the link between powder and part characteristics is essential for SLM, and measuring powder characteristics after building production parts may prove to be an important marker for part quality. Initial powder characterisation testing was conducted on powder that had been recycled up to five times. The results showed a trend towards increased Particle Size Diameter (PSD) through repeated recycling, with a reduction in the number of fine particles. Additionally, a roughening of the powder surface was observed, with a reduction in the sphericity of powder particles. Chemical composition tests on the powder to determine changes in interstitial oxygen and nitrogen showed negligible change through repeated recycling.

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Remarks Paper presented at KES International Conference on Sustainable Design and Manufacturing, 12-14 April 2015
First date of publication in InImpact: 1 December 2015