EUROPEAN CONGRESS AND EXHIBITION ON ADVANCED MATERIALS AND PROCESSES - EUROMAT 2021

High Entropy Alloys (HEAs) have attracted significant attention in the past decade due to the ability to form a single solid solution phase by breaking the conventional alloying strategy of having a single base metal. This has resulted in a variety of microstructures and properties that compete with conventional alloys. Recently, powder metallurgy has appeared to be a promising alternative to...

When considering the use of novel binders for cemented carbides, the dramatic influence of the interaction between the binder and the hardphase must be taken into consideration. This interaction will determine the phases present in the final microstructure, as well as the final composition of the binder phase. The fast development of thermodynamic software tools during the last years has...

Progressive die-tools are essential for the production of steel components within the sheet metal industry. Due to increasing demands on component quality and tool life, WC-Co based carbides are increasingly used as material for the cutting elements within the progressive die-tools. The manufacture of cutting elements, consisting of punches and dies, requires a combination of subtractive...

To reduce the manufacturing time in turning parts with shallow superficial features like grooves of various geometries and short peripheral length, inserts with correspondingly shaped cutting edges may be used. Due to the short cutting time per part compared to the accumulative one associated with the overall tool life, turning process resembles interrupted cutting with alternative cutting...

Plansee Tungsten Alloys manufactures innovative Tungsten Heavy Alloys for applications requiring resistance to extreme conditions. The improvement of these alloys requires essentially an accurate knowledge of phase equilibria in the W–Ni–Co–Fe quaternary system for a wide range of temperatures in order to avoid embrittlement from interfacial precipitation of intermetallic phases. The W–Ni–Co...

One of the most interesting characteristics of the high entropy alloys (HEAs) is that they form a solid solution which lattice with a high distortion resulting in a low diffusion coefficient and an impediment to sliding of dislocations. These alloys have more than 4 principal elements, which increases the entropy of the system and increases the solubility between them, promoting the formation...

Heat resistant steels demand microstructures that remain stable under high-temperature conditions. Security and thermal efficiency are key factors for future nuclear reactors, for this reason, improved materials have to be researched and developed. ODS ferritic alloys exhibit an excellent mechanical behavior under strong irradiation and high working temperatures, making them suitable for...

Nowadays, there is a growing interest in the development of advanced materials capable to achieve high mechanical properties while maintaining lightweight, as the metallic matrix nanocomposites (MMNCs). Although the MMNCs can be reinforced by different nanometric materials, the carbon nanotubes (CNTs) are pointed as the most promising, due to their unique structure and properties, as well as...

Oxide-dispersion strengthened materials show improved high temperature mechanical properties, their production via mechanical alloying is, however, not only time consuming but also in some cases difficult to implement. Therefore, in order to improve the efficiency of the process of mechanical alloying, cryomilling was investigated for the production of oxide-dispersion strengthened...

Manganese alloyed steels with high Mn and medium C content offer TRIP behaviour and thus the chance to attain local surface hardening through martensite formation during sizing or rolling. This is an attractive option also for PM precision parts. In the present study, sintered steels with 9% Mn and varying C contents were prepared by pressing and sintering, and the deformation and...

For economic reasons, moderate sintering temperatures are usually preferred in the industrial production of PM steels, despite technical advantages of high sintering temperatures. In recent years, advances in the atomization technologies as well as in the alloying design area have provided the possibility of producing fine masteralloy powders that afford homogenization of the alloying elements...

Chromium pre-alloyed powder metallurgy (PM) steels are extensively used in high-performance applications due to their low costs, good recycling capabilities, and high hardenability. High density is one of the main pre-requisite properties for high-performance components. In this current study, water atomized pre-alloyed with 1.8 wt.% Cr is utilized and admixed with 0.3 wt.% UF-4 natural...

Supersolidus sintering is a process variant in powder metallurgy that is known to promote densification during sintering in a particularly efficient way. For powder metallurgy precision parts, high density would be particularly attractive of combined with the associated mechanical properties. In the present study, supersolidus sintering was studied on PM plain carbon steels and Mo alloyed...

Currently, most of mechanical components made by powder metallurgy (PM) use steel powders that also contain nickel carbonyl. Nickel-containing steel powder allows to obtain parts with excellent density, toughness and fatigue strength, but at the same time Nickel is a carcinogenic element with high costs. For this reason, in the last years, metal powder manufacturers have developed new,...

In-situ 3D imaging has proved to be highly valuable for improving the understanding and modeling of sintering of metallic and glass powders. For ceramics, owing to the complex and fine architecture of the individual grains, a much better resolution is required. Hence the experimental studies conducted previously on ceramic sintering have mostly been concerned with agglomerates, rather than at...

Electronic devices are continuously evolving towards high performance and miniaturization size. In this way, heat dissipation problem has become a major obstacle to their development. Generally, the heat generated is typically transferred to a heat sink by heat conduction, and then to the ambient by natural, mixed or forced convection. Low efficiency of heat removal could cause damage due to...

The continued adoption of metal additive manufacturing (AM) techniques poses unique challenges to the producer, as well as the end user of powders.
From the manufacturing point of view, the dispersion jets used in the production need a precise measure of viscosity in order to achieve a homogeneous and spherical stock. Here we will show the influence different alloys have on the viscosity of...

Prototyping alternatives for Powder Injection Moulding (PIM) components involving additive manufacturing have been studied in the recent years. Fused Filament Fabrication (FFF), which is an indirect and sinter-based printing technology, is selected for this study, since it is the most cost-effective solution that leads to similar PIM microstructures and performance of the sintered parts....

Metal Additive Manufacturing (MAM) processes are becoming widely used not only at Lab scale but also at production level. The most used MAM methods are Laser Powder Bed Fusion (LPBF) and Direct Energy Deposition (DED). The feedstock material for both additive manufacturing methods is metal powder. The quality of the powders has to be characterized before printing to reduce process uncertainty...