Metal Additive Manufacturing Conference - MAMC 2021

Complex metallic structures additively manufactured via laser powder bed fusion (L-PBF) is an already established technique in this rapidly growing industry branch. However, the development of alloys for field-specific applications and the quality and functionality of the final parts strongly depends on the micro- and nanostructure morphology, crystallography and chemical...

Additive manufacturing (AM) generates complex multi-scale microstructures in metallic components, differing from conventional microstructures in terms of grain structure, cell substructure, elemental distribution, and residual stress. It is therefore important to analyse AM microstructures across multiple length scales using correlative microscopy techniques to establish comprehensive...

In recent years, the method of additive manufacturing has become more and more important in the production of magnetic materials due to higher demands for miniaturization and complex- shaped magnet parts. With the method of Laser beam- powder bed fusion (LB-PBF), an in- situ alloying process for the additive manufacturing of the Fe-Cr-Co system has been developed. With this novel method that...

Additive manufacturing is an attractive and now well-accepted technique. Nevertheless, to reach its full potential, the method needs, among other issues, to cope with distortion and residual stress. High, local and quickly moving heat input leads to high temperature gradients that give rise to residual stresses during solidification and cooling. Due to residual stresses, components can crack...

Additively manufactured (AM) samples exhibit a pronounced texture formation along the build direction (i.e. along z-axis) that predefines an anisotropic mechanical behavior of the final bulk materials. Consequently, different mechanical properties can be measured in tensile tests along and perpendicular to the build direction, depending on the initial orientation of the sample in the powder...

Due to the raster heat inputs, steep temperature gradients and rapid cooling, the selective laser melting (SLM) process generally induces high residual stresses heterogeneity across the fabricated parts. In the case of gears, such variations on the teeth flank may have a negative effect on the fatigue behavior. This study analyzes the influence of residual stresses heterogeneity induced by SLM...

This study aims to investigate the influence of different process gases on the processing of a Zr-blended aluminum 7075 alloy by laser-based powder bed fusion. Two common gases for this process, argon and nitrogen, are compared. The objective is to study the effect of the gases on crack formation in the bulk material with respect to the possible formation of nitrides. In order to assess this...