Menzler, J. E. Klusmann, M. Wulfmeier, M. Büschgens, D. Pfeifer, H.
Published in
HTM Journal of Heat Treatment and Materials
Gas impingement jets are widely applied in industrial cooling processes. In continuous heat treatment lines of steel, aluminium and copper strips, impingement jet nozzle systems are utilised to achieve rapid cooling or heating. The heat transfer depends on the flow but also on the geometric parameters such as nozzle to strip distance and the nozzle...
Schöning, H. Kadanik, M. Reich, M. Petersen, S. Kessler, O.
Published in
HTM Journal of Heat Treatment and Materials
Induction hardening of large bearing rings is a very challenging procedure due to the complex physical processes and their interactions, which need to be properly controlled to produce components meeting the imposed requirements of e.g. wind turbines. The different process parameters significantly alter the resulting microstructures and properties ...
Johannsen, Leif
The human voice plays a major role in interpersonal communication. A key property of the voice is its directionality, as it influences the energy distribution in the surrounding space and at the ear of the receiver. Research on this topic is of great relevance for architectural design, the development of new technologies in the field of telecommuni...
Bernier, Laurent
This thesis presents the results of the simulation of two different parts from the typical atmospheric interface found in a mass spectrometer: the transfer capillary and the ion funnel. These are usually found in combination with electrospray ionization and allow the transition between atmospheric pressure and vacuum. The main goal of the study is ...
Hepp, E. Dzusov, M. Schäfer, W.
Published in
HTM Journal of Heat Treatment and Materials
Austempered ductile iron (ADI) materials show a good combination of mechanical properties, with high tensile strength levels (800-1600 MPa) and an elongation at fracture of up to 10 %. Due to its high fracture toughness as well as high fatigue resistance, ADI is a very attractive material group for applications under cyclic loads. However, the mate...
Hugenroth, Kristin
Kreyenschulte, Moritz Xu, Wenjia Schüttrumpf, Holger
He, Xin
The structure of biological adhesion systems, which mainly contribute to insects’ strong adhesion ability, have attracted great interest of researchers in the last few decades. A lot of theoretical analysis has been carried out to understand the mechanism of bio-adhesion, for example, the concept of contact splitting and the principle of equal load...
Meinecke, Stefan
Passively mode-locked lasers produce regular optical pulse trains at high repetition rates and find many applications in science and technology. This thesis numerically investigates two specific devices: a monolithically integrated three-section tapered semiconductor quantum-dot laser and a V-shaped external cavity semiconductor laser. Both lasers ...
Kadanik, M. Burgschat, L. Reich, M. Petersen, S. Keßler, O.
Published in
HTM Journal of Heat Treatment and Materials
Heat treatment simulation of inductive surface hardening of large bearing rings is a challenging multi-physical task. Besides the determination of material and process parameters of induction heating, the quenching process must be modelled to obtain realistic results concerning surface hardening depth as well as information about residual stresses ...
