Thermal Conductivity of Ti-6Al-4V in Laser Powder Bed Fusion

• DOI: 10.3389/fmech.2022.830104
• Publication Date: 2022-07-01T04:39:58Z
• Authors: Katharina Bartsch; Bastian Bossen; Waqar Chaudhary; Michael Landry; Dirk Herzog
• Keywords: Realization (probability); Particle (ecology)

With increasing maturity of the laser powder bed fusion (PBF-LB/M) process, related products are becoming more complex. The conventional parts integrated into one design, requirements regarding local material properties arise. This concerns for instance with high demands temperature management. Here, different thermal conductivities within part enable control distribution as well direction heat flows. realization those poses a challenge, though, use multiple materials in PBF-LB/M is not broadly available. However, states PBF-LB/M, i.e. bulk and material, provide opportunity to create metamaterials locally varied conductivities. To design utilizing enclosed powder, this study investigates respective Ti-6Al-4V. Powder printed samples were measured at RT by Modified Transient Plane Source method, resulting an effective conductivity 0.13 W/mK 5.4 (compared 6.5 prior experiments). For complete assessment because many uncertainties due particle size application, computational model following network modeling approach created. used data set 60 configurations, which then statistically evaluated description independent from packing. Finally, application investigations achieve capable management single presented numerical study. cases shielding concentration flow demonstrated.