Laser powder bed fusion of Ti-6Ta-1.5Zr-0.2Ru-5Cu (mass%) – process parameter evaluation using single tracks analysis

Laser powder bed fusion of Ti-6Ta-1.5Zr-0.2Ru-5Cu (mass%) – process parameter evaluation using single tracks analysis

Authors

Ngwakoana Phala^1*, Claudia Polese², Jakub Ciftci^3,4, Tomasz Choma^3,4 and Lesley Cornish¹

¹ School of Chemical and Metallurgical Engineering and DSI-NRF CoE in Strong Materials, University of the Witwatersrand, Johannesburg, South Africa
² School of Mechanical, Aeronautical and Industrial Engineering, University of the Witwatersrand, Johannesburg, South Africa
³ Warsaw University of Technology, Faculty of Materials Science and Engineering, Wołoska 141, 02- 507 Warsaw, Poland
⁴ AMAZEMET Sp. z o. o. [Ltd.], Al. Jana Pawła II 27, 00-867 Warsaw, Poland

Abstract

Printing of single tracks from atomised powder was carried out to determine the potential parameters for Laser Powder Bed Fusion of Ti- 6Ta-1.5Zr-0.2Ru-5Cu (mass%). Parameters that were varied included laser power, scanning speed, beam diameter, linear and planar energy density. The single tracks were characterised by SEM and SEM-EDX, showing variations in microstructural homogeneity. Promising tracks were produced using laser power of 157.5 W, scanning speed of 600 mm/s, beam diameter of 0.15 mm, 0.263 J/mm linear energy and 1.750 J/mm² planar energy density. XRD for one of these tracks indicated (αTi) and (βTi) solid solutions as well as the Ti₂Cu phase.