Behrens, C. Siewert, M. Lüke, A. Bödeker, D. Ploshikhin, V.
Published in
HTM Journal of Heat Treatment and Materials
Additive manufacturing (AM) is driven by design freedom, having fewer process constraints than traditional manufacturing processes. It requires careful process control and qualified parameters to create dense metal parts. However, defects in the form of cavities can be detected in as-built specimens by computed tomography. Post-processing technique...
Heinz, P. Juckelandt, K. Lutz, S.
Published in
HTM Journal of Heat Treatment and Materials
To improve the process development for high pressure gas quenching a digital quenching simulation model combining the fields of computational fluid dynamics and heat treatment process simulation has been developed. It was found that the gas flow and hence the quenching properties depend on both local (geometry of parts, carrier and chamber) as well...
Strauß, L. Lübbecke, S. Löwisch, G.
Published in
HTM Journal of Heat Treatment and Materials
Laser-based powder bed fusion of metals exhibit process-induced anisotropy and residual stresses, making post-manufacturing heat treatment occasionally beneficial. For AlSi10Mg, a T6 heat treatment (solution annealing, quenching, artificial aging) is recommended. Nevertheless, mechanical strength decreases as (1) the eutectic Si network dissolves, ...
Jürgensen, J. Pohl, M.
Published in
HTM Journal of Heat Treatment and Materials
The widespread use of hydrogen as an energy carrier is considered one of the most important keys to achieving the decarbonization necessary for the energy transition in numerous areas of technology and society. Not least due to the associated contact of metallic components with (pressurized) hydrogen, there is a latent risk of hydrogen-induced crac...
Fechte-Heinen, R. Fuhrländer, D. Mehner, A. Decho, H. Castens, M. Burkart, K. Tinscher, R. Stührmann, T.
Published in
HTM Journal of Heat Treatment and Materials
The use of hydrogen as a climate-friendly energy source is gaining strongly in importance, as it represents the only solution for short- to medium-term decarbonization for some industrial sectors, such as the steel and basic materials industries. Increasing innovation density and scaling of electrolysis is creating a broader range of uses and appli...
Hütter, S. Kauss, N. Halle, T.
Published in
HTM Journal of Heat Treatment and Materials
Determining the phase transition data of technological materials used for example to design heat treatment processes is generally a complex and labor-intensive process if high data fidelity is required. This work presents a method based on the standard Jominy end quench test with additional instrumentation that can generate many temperature histori...
Kresser, S. Schneider, R. Zunko, H. Sommitsch, C.
Published in
HTM Journal of Heat Treatment and Materials
Quenching and partitioning (Q&P) is a heat treatment used to adjust the retained austenite content in the microstructure. Such heat treatment is used mainly for low-alloyed steels. However, the partitioning effect has an influence on higher alloyed steels also, such as martensitic stainless steels. The typical heat treatment for these steels is que...
Mallow, S. Schmitt, M. Gebauer, M. Stockburger, R. Reich, M. Kessler, O.
Published in
HTM Journal of Heat Treatment and Materials
As an additive manufacturing process, powder bed fusion of metals using a laser beam (PBF-LB/M) enables the near-net-shape production of complex components in a single step. In combination with case hardening, it will thus be possible in the future to produce lightweight, functionally integrated transmission components characterized by high-strengt...
Müller, R. Hengst, P. Biermann, H. Buchwalder, A.
Published in
HTM Journal of Heat Treatment and Materials
The present investigations serve to characterize Inconel 718 layers deposited onto a stainless steel by means of wire-based electron beam cladding. The investigations analyze the depth-dependent element concentration and the hardness profile, while providing a detailed microstructural examination. It is thus shown that multilayer coating systems ca...
Jäger, S. Großwendt, F. Weber, S. L. Röttger, A.
Published in
HTM Journal of Heat Treatment and Materials
Powder production for additive manufacturing is currently mainly done by inert gas atomization. A new process is the production of low-oxygen and highly spherical metal powders by ultrasonic atomization from a wire or rod feedstock. As a crucible-free process and because of an electric arc as an energy source, even materials with a high liquidus te...
