Jens Dierdorf

TL;DR: In this paper, a high-manganese Fe −29Mn −0.3C TWIP steel was produced by twin-roll strip casting and subjected to additional thermo-mechanical treatment.

TL;DR: In this paper, the effect of different cold rolling strategies, annealing treatments, and sheet metal blanking (punching) regarding microstructure evolution, magnetic properties, and deterioration is studied.

Abstract: This paper presents both the effect of cutting on the material behavior of a typical used NGO electrical steel grade M230-30A as well as a study of the effect of annealing temperature after cold rolling on microstructure and magnetic properties beginning with an industrial hot rolled 2.4 wt.% Silicon steel of 2.0mm thickness. Modifications in the local mechanical properties due to the cutting process are investigated in detail. A quantitative analysis of the impact of material degradation for non-oriented electrical steels applied in traction drives is presented. In order to consider the large speed range of drives in automotive applications and the presence of higher harmonics, this analysis is conducted for a wide range of frequencies and magnetic polarizations. Nanoindentation is used to analyze the effect of strain from cutting on the hardness near the surface. A major conclusion is that it is indispensable to take into account influences due to material processing on magnetic materials properties during the design process of electrical machines.

TL;DR: In this article, the influence of production and processing on the magnetic properties of a 2.4 wt% SiC steel was studied. But the authors focused on the effect of lamination thickness, microstructure and texture on magnetic properties.

TL;DR: In this article, a multiscale approach is presented investigating the effect of the ferrite-pearlite microstructure after annealing on the subsequent machining process of a steel gear.