The effect of scan speed and hatch distance on prior-beta grain size in laser powder bed fused Ti-6Al-4V
dc.contributor.author | Louw, D.F. | |
dc.contributor.author | Pistorius, Pieter Georg Hendrik | |
dc.date.accessioned | 2019-12-09T10:11:58Z | |
dc.date.issued | 2019-08 | |
dc.description.abstract | Ti-6Al-4V produced by laser powder bed fusion can achieve mechanical properties similar to its wrought counterpart if an appropriate post-process heat treatment is applied. The response of the material to post-process heat treatment depends on the prior-beta grain size in the as-built condition. The current article illustrates that a reduction in hatch distance can cause coarsening of prior-beta grains due to retained heat that reduces the cooling rate. On the other hand, an increase in scan speed refines prior-beta grains. Unfortunately, an increase in scan speed has to be accompanied by a reduction in hatch distance to prevent an increase in porosity and the potential grain refinement is then cancelled out. The use of a faster scan speed in combination with a smaller hatch distance significantly improves roughness of the top surface. EBSD in combination with reconstruction of prior-beta grains is an effective technique to quantify prior-beta grain size. Furthermore, the use of Rosenthal’s equations allows quick calculation of cooling rate that can be used to predict the dependence of prior-beta grain size on process parameters. | en_ZA |
dc.description.department | Materials Science and Metallurgical Engineering | en_ZA |
dc.description.embargo | 2020-04-18 | |
dc.description.librarian | hj2019 | en_ZA |
dc.description.sponsorship | South Africa’s Department of Science and Technology through the Collaborative Program in Additive Manufacturing. | en_ZA |
dc.description.uri | http://link.springer.com/journal/170 | en_ZA |
dc.identifier.citation | Louw, D.F. & Pistorius, P.G.H. The effect of scan speed and hatch distance on prior-beta grain size in laser powder bed fused Ti-6Al-4V. International Journal of Advanced Manufacturing Technology (2019) 103: 2277-2286 https://doi.org/10.1007/s00170-019-03719-w. | en_ZA |
dc.identifier.issn | 0268-3768 (print) | |
dc.identifier.issn | 1433-3015 (online) | |
dc.identifier.other | 10.1007/s00170-019-03719-w | |
dc.identifier.uri | http://hdl.handle.net/2263/72548 | |
dc.language.iso | en | en_ZA |
dc.publisher | Springer | en_ZA |
dc.rights | © Springer-Verlag London Ltd., part of Springer Nature 2019. The original publication is available at : http://link.springer.comjournal/170. | en_ZA |
dc.subject | Titanium metallurgy | en_ZA |
dc.subject | Selective laser melting | en_ZA |
dc.subject | Additive manufacturing | en_ZA |
dc.subject | Laser powder bed fusion (LPBF) | en_ZA |
dc.subject.other | Engineering, built environment and information technology articles SDG-04 | |
dc.subject.other | SDG-04: Quality education | |
dc.subject.other | Engineering, built environment and information technology articles SDG-09 | |
dc.subject.other | SDG-09: Industry, innovation and infrastructure | |
dc.subject.other | Engineering, built environment and information technology articles SDG-12 | |
dc.subject.other | SDG-12: Responsible consumption and production | |
dc.subject.other | Engineering, built environment and information technology articles SDG-13 | |
dc.subject.other | SDG-13: Climate action | |
dc.title | The effect of scan speed and hatch distance on prior-beta grain size in laser powder bed fused Ti-6Al-4V | en_ZA |
dc.type | Postprint Article | en_ZA |