Influence of heat treatments on the microstructure and tensile behaviour of selective laser melting-produced TI-6AL-4V parts
Date
2016
Journal Title
Journal ISSN
Volume Title
Publisher
Southern African Institute for Industrial Engineering
Abstract
ENGLISH ABSTRACT: In industry, post-process heat treatments of Ti-6Al-4V are performed with the aim of improving its tensile behaviour. While heat treatments of wrought Ti6Al4V have been standardised (e.g., Aerospace Material Specification H-81200), heat treatments of selective laser melting (SLM)-produced Ti-6Al-4V lacks research and understanding. Significant concern exists about SLM Ti6-Al-4V’s achievable ductility attributed to its martensitic (α’) phase. In this research, heat treatments at a range of temperatures are applied to SLM-produced Ti-6Al-4V tensile samples. Microstructural analysis (both optically and through electron backscatter diffraction) was used to identify links between heat treatments and microstructure. Subsequently, uniaxial tensile tests were performed to determine the respective tensile properties of all samples. Correlations in the data show a significant loss in strength with respect to an increase in annealing temperature due to grain growth, while no noticeable trend was observed for fracture strain with regard to annealing temperatures.
AFRIKAANSE OPSOMMING: Geen opsomming beskikbaar
AFRIKAANSE OPSOMMING: Geen opsomming beskikbaar
Description
CITATION: Ter Haar, G. M., Becker, T. & Blaine, D. C. 2016. Influence of heat treatments on the microstructure and tensile behaviour of selective laser melting-produced TI-6AL-4V parts. South African Journal of Industrial Engineering, 27(3):174-183, doi:10.7166/27-3-1663.
The original publication is available at http://sajie.journals.ac.za
The original publication is available at http://sajie.journals.ac.za
Keywords
Heat treatments, Metal -- Microstructure, Laser welding
Citation
Ter Haar, G. M., Becker, T. & Blaine, D. C. 2016. Influence of heat treatments on the microstructure and tensile behaviour of selective laser melting-produced TI-6AL-4V parts. South African Journal of Industrial Engineering, 27(3):174-183, doi:10.7166/27-3-1663