Metal Additive Manufacturing Conference - MAMC 2021

Geometric accuracy of parts manufactured by Laser Powder Bed Fusion (LPBF) is deteriorated by powder particles sintered to the part surface as well as excessive melting due to overheating by limited heat flow at sharp contour corners. While the sintered powder particles increase the surface roughness, overheating leads to deviations of the as-built part geometry from the CAD geometry. Use of...

Additive manufacturing of heat treatable low alloy steels by
Laser beam powder bed fusion (LB-PBF) offers a number of difficulties,
which is the reason why their use in commercial AM is rather limited
today. In the present study, processing of several AISI 4xxx type steels
(Cr-Mn-Mo alloyed) has been studied, and the processing windows have
been defined for 2 different machines, with...

Carbon-containing ferrous alloys with >0.2 wt.% carbon are considered difficult to weld materials and are thus expected to have poor processability when using Laser Powder Bed Fusion (L-PBF). This is connected to the high cooling rates of L-PBF that result in the formation of martensite and internal residual stresses that create a significant risk of cold cracking within the material. However,...

Laser Metal Deposition (LMD) is an established repair process for components such as thin-walled turbine blades. Repair of thin-walled structures encounters several challenges due to the limited heat transfer. If the narrow process window is not met, mechanical properties and geometric accuracy deteriorate. Because of the rising temperature during the LMD process, its parameters usually need...

As Additive Manufacturing (AM) technologies mature, the lack of tailored alloys becomes more and more of an obstacle for a widespread application for AM. Alloy development has historically been a costly process taking decades or centuries. In the case of AM, however, new improved alloys have to be developed much faster, calling for time- and resource-efficient alloy development methods. These...

EOS and Linde combined their respective expertise to jointly undertake research in the field of additive manufacturing and material-gas interaction. The aim of this study was to improve AISi10Mg properties according to customer needs. The influence caused by different impurities of the process gas on the generated material quality as well as the influence on the process itself were...

• Strategies for the improvement of the overall service lifespan for high pressure die casting dies and the common failure mechanisms that lower this lifespan, like soldering and thermal fatigue behaviour with the correct combination of conventional and additive manufactured materials
• A comparison of conventional hot work tool steels, maraging steels and nickel-based alloys with their...

The use of bioresorbable materials for orthopaedic devices allows the sparing of the second (removal) surgery and could enhance bone regeneration mechanisms. One promising candidate from the biodegradable metals is Magnesium (Mg) as it comprises several advantages: degradability within the human body, high biocompatibility as Mg is part of our daily nutrition system and mechanical properties...

Zr-based bulk metallic glasses show high glass forming ability and are attractive base materials for near future additive applications. A new composition was printed by in-situ alloying from elemental powders via selective laser melting. In order to obtain a glassy, crack-free and dense bulk parts, a wide range of laser and scanning parameters were used and optimized. An SLM machine equipped...