Improving the microstructure of high speed selective laser melted Ti6A14V components by varying residence time during heat treatment

Lekoadi, Paul MTlotleng, MonnammeMaledi, NMasina, Bathusile N2019-12-022019-12-022019-11Lekoadi, P.M., Tlotleng, M., Maledi, N. and Masina, B.N. 2019 Improving the microstructure of high speed selective laser melted Ti6A14V components by varying residence time during heat treatment. 20th Annual International Rapid Product Development Association of South Africa (RAPDASA 2019), Emoya Estate, Bloemfontein, South Africa, 6- 8 November 2019, 7pphttps://site.rapdasa.org/wp-content/uploads/2019/10/RAPDASA-DAY-PROGRAMME-web-1.pdfhttps://site.rapdasa.org/annual-conference/http://hdl.handle.net/10204/11246Paper presented at 20th Annual International Rapid Product Development Association of South Africa (RAPDASA 2019), Emoya Estate, Bloemfontein, South Africa, 6- 8 November 2019. This is the full text version of the work.Selective laser melting (SLM) is a powder bed additive manufacturing technique that produces components layerby-layer from computer aided designs as opposed to conventional manufacturing methods. Although this manufacturing technique offers various advantages, the microstructure of the produced components exhibits an acicular martensitic a’ phase which exhibits low ductility and high hardness on the produced components. Heat treatment is known to improve the microstructure and ductility and hardness of SLM produced Ti6Al4V components. This study reports on the effect of residence time during heat treatment of Ti6Al4V samples that were built with Aeroswift 3D printing SLM machine. Samples were heat treated to a temperature of 1000°C and held for 2hrs, 4hrs, 8hrs, 10hrs and 12hrs before furnace cooling. It was found that the microstructure transformed from martensitic to lamella a+ß, then to globular a+ß as residence time was increased. Furthermore, grain growth was observed with an increase in residence time.enSelective laser meltingHeat treatment3D printingImproving the microstructure of high speed selective laser melted Ti6A14V components by varying residence time during heat treatmentConference PresentationLekoadi, P. M., Tlotleng, M., Maledi, N., & Masina, B. N. (2019). Improving the microstructure of high speed selective laser melted Ti6A14V components by varying residence time during heat treatment. RAPDASA. http://hdl.handle.net/10204/11246Lekoadi, Paul M, Monnamme Tlotleng, N Maledi, and Bathusile N Masina. "Improving the microstructure of high speed selective laser melted Ti6A14V components by varying residence time during heat treatment." (2019): http://hdl.handle.net/10204/11246Lekoadi PM, Tlotleng M, Maledi N, Masina BN, Improving the microstructure of high speed selective laser melted Ti6A14V components by varying residence time during heat treatment; RAPDASA; 2019. http://hdl.handle.net/10204/11246 .TY - Conference Presentation AU - Lekoadi, Paul M AU - Tlotleng, Monnamme AU - Maledi, N AU - Masina, Bathusile N AB - Selective laser melting (SLM) is a powder bed additive manufacturing technique that produces components layerby-layer from computer aided designs as opposed to conventional manufacturing methods. Although this manufacturing technique offers various advantages, the microstructure of the produced components exhibits an acicular martensitic a’ phase which exhibits low ductility and high hardness on the produced components. Heat treatment is known to improve the microstructure and ductility and hardness of SLM produced Ti6Al4V components. This study reports on the effect of residence time during heat treatment of Ti6Al4V samples that were built with Aeroswift 3D printing SLM machine. Samples were heat treated to a temperature of 1000°C and held for 2hrs, 4hrs, 8hrs, 10hrs and 12hrs before furnace cooling. It was found that the microstructure transformed from martensitic to lamella a+ß, then to globular a+ß as residence time was increased. Furthermore, grain growth was observed with an increase in residence time. DA - 2019-11 DB - ResearchSpace DP - CSIR KW - Selective laser melting KW - Heat treatment KW - 3D printing LK - https://researchspace.csir.co.za PY - 2019 T1 - Improving the microstructure of high speed selective laser melted Ti6A14V components by varying residence time during heat treatment TI - Improving the microstructure of high speed selective laser melted Ti6A14V components by varying residence time during heat treatment UR - http://hdl.handle.net/10204/11246 ER -