Metal Additive Manufacturing Conference - MAMC 2023

Most commercial Directed Energy Deposition(DED) machine tools use pneumatic methods of feedstock handling; the current study proposes a gravity-based design. The powder metering in the current design is accomplished via a helical-grooved metering rod rotating inside a powder-filled hopper, continuously dispensing powder mass in a small user-defined quantity. This powder is then shaped into a...

Ti-6Al-4V alloys are extensively used as a substitution for human bones as they are biocompatible, lightweight, corrosive resistant, and have low elastic modulus. Additive Manufacturing (AM) is the best suitable process for realizing complex biomedical implants of Ti-6Al-4V alloys. However, some implants require a mirror-like polished surface typically obtained through a post-processing...

The actual state of the art in SLM is linked to the utilization of certain parameters according to the metal powder. Nevertheless, the shape and geometrical features of the parts to print as well as unexpected defects during the fusing process may lead to inconsistencies in the final part properties. In addition, there is a lack of monitoring tools that allow to analyze the process in-situ and...

The introduction of additive manufacturing (AM) has dramatically increased design freedom, and at the same time complicated the identification of the most suitable manufacturing technology for mechanical parts. Manufacturing process selection is typically carried out by experts, but this operation is increasingly challenging and experts are difficult to recruit. Hence, the main aim of this...

Wire-based Directed Energy Deposition (W-DED) is an often preferred method for the fabrication and repair of large metallic mechanical components because of its high deposition rate and cost-effectiveness. Utilizing higher kinematics for deposition in robotic W-DED facilitates the creation of overhanging structures without the need for additional support structures. However, there is currently...

Additive manufacturing (AM) processes, such as laser powder-bed fusion (LPBF), are commonly used to produce various components by using a laser to melt metal powders. Due to its widespread utilization, stainless steel 316L is one of the most commonly used materials in LPBF. It is well known that powders used in LPBF are affected by various factors, such as the manufacturing process,...

The Selective Laser Melting (SLM) process commonly known as Laser-based Powder Bed Fusion (LB-PBF), enables the production of structures with unprecedented degrees of freedom that represents an excellent condition for development of metallic implants for biomedical applications. In this study, the effects of laser energy density on relative density and microstructure (presence of internal...

Components such as cables, screws, nails and many other things vital for our modern society are made from cold drawn wire. The wire is produced by pulling hot rolled wire through a single or a series of tools called drawing dies. In this process the cross-section of the wire is reduced, and the mechanical properties of the material is enhanced. Even though it is classified as a cold working...

Lattice structures (porous scaffolds) with interconnected pores provide better osteointegration compared to solid implants and minimize the stress shielding effect by reducing the effective elastic modulus of implants closer to the natural bones. This research focuses on developing biocompatible Orthopedic implants with reduced stress-shielding, better load-bearing and osteointegration...

Powder bed Electron Beam Melting of Ti-6Al-4V possesses better ultimate tensile strength than the conventional mill annealed Ti-6Al-4V. The changes in microstructure, tensile and fatigue crack growth rates were observed in the heat-treated samples below and above β transus temperature for one hour residence time followed by water and furnace cooling. Heat treatment below β transus temperature...

In the context of additive manufacturing, bulk metallic glasses (BMGs) are a type of material that has gained attention due to their potential for producing large and intricate parts. However, when using the laser powder bed fusion (LPBF) technique to 3D print BMGs, there are challenges associated with the reheating of previously solidified layers during the process. This reheating can impact...