Developing Tungsten-Filled Metal Matrix Composite Materials Using Laser Powder Bed Fusion

Some aspects on designing for metal Powder Bed Fusion

Additive Manufacturing (AM) using the Powder Bed Fusion (PBF) is a relatively new manufacturing method that is capable of creating shapes that was previously practically impossible to manufacture. Many think it will revolutionize how manufacturing will be done in the future. This thesis is about some aspects of when and how to Design for Additive Manufacturing (DfAM) when using the PBF method i...

Metal Powder-filled Polyethylene Composites. v. Thermal Properties Metal Powder-filled Polyethylene Composites. v. Thermal Properties

Thermal properties—such as thermal conductivity, thermal diffusivity, and specific heat—of metal (copper, zinc, iron, and bronze) powder-filled high-density polyethylene composites are investigated experimentally in the range of filler content 0–24% by volume. Experimental results show a region of low particle content, 0–16% by volume, where the particles are distributed homogeneously in the po...

Laser Penetration in a Powder Bed during Selective Laser Sintering of Metal Powders: Simulations versus Experiments

To gain a better understanding and control of the Selective Laser Sintering (SLS) process, more fundamental and modeling work is needed. A simple analytical ray-tracing model has been developed to simulate the energy absorption and penetration in SLS. The model is applied to FeCu and WC-Co powder mixtures, irradiated by Nd-YAG or CO2 laser. It gives an evaluation of the total energy incoupling ...

Effects of powder recycling on stainless steel powder and built material properties in metal powder bed fusion processes

Argon-Ion Laser Vs Quartz-Tungsten-Halogen Curing of Polyacid Modified Composite Resin Restorative Materials

Recently, there has been an interest in using an argon laser to initiate polymerization of light-activated materials [11]. The argon laser, the active medium of which is argon gas, produces light at two wavelengths. The 488 nm blue light is commonly used to initiate the polymerization of restorative composite materials. The 514 nm blue green light has maximum absorbance in tissues that are comp...