|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Nano/Micro-mechanics and Length-scale Phenomena
||Mechanical Properties of Single Struts Made by Laser Powder-bed Fusion: Effects of Melt-track Transient States and Process Parameters
||Behzad Fotovvati, Subin Shrestha, Kevin Chou
|On-Site Speaker (Planned)
Porous metal structures are composed of several single struts, properties of which influence the properties of the whole structure. Layer-by-layer fabrication of porous structures requires very short laser scan tracks. The available literature correlates the laser powder bed fusion (LPBF) process parameters to parts mechanical properties, however, in porous structures that contain small features, a different phenomenon is governing these correlations. Our previous research studies indicate that the melt-pool does not reach a quasi-steady state in short scan tracks. Having consistent melt-pool dimensions is particularly crucial for small features, such as single struts. The transient length, i.e., the length at which the melt-pool reaches a steady-state, strongly depends on the LPBF process parameters. In this work, small tensile samples, with gauge widths ranging from 0.25 mm to 2.0 mm, are fabricated using different process parameters to investigate the effect of transient length on the mechanical properties of single struts.
||Additive Manufacturing, Mechanical Properties, Titanium