|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Building the Pathway towards Process and Material Qualification
||Assessment of the Material Performance upon Additive Manufacturing – Are Post-treatments Always Required?
||Thomas Niendorf, Stefan Leuders, Liang Wu, Johannes GŁnther, Florian Brenne
|On-Site Speaker (Planned)
Powder bed additive manufacturing (AM) allows for direct production of net-shape components. Common techniques employed are selective laser melting (SLM) and electron beam melting (EBM).
During AM both geometry and microstructure are established simultaneously. Thus, process-microstructure-property relationships have to be understood in-depth. Rapid solidification and intrinsic heat treatment allow for direct microstructure design, however, depending on the material and the process employed, significant differences arise.
The current study will present results on a variety of alloys processed by SLM and EBM. The role of surface conditions, residual stresses, grain morphology, porosity and texture will be detailed for alloys such as Ni-based superalloys (precipitation hardened) and Ti-6Al-4V (showing martensitic phase transformation). The results obtained reveal that depending on the envisaged application, post-treatments can be abstained from or have to be conducted. Most prominent is cyclically loaded Ti-6Al-4V, which only can be employed in a hot isostatic pressed (HIP) state.
||Planned: Supplemental Proceedings volume