The influence of silicon content on physical properties of non-oriented silicon steel

Abstract

Electric motors make up a large portion of our global electricity consumption and have enjoyed a long history doing so. Electrical steels are popularly used materials in electric motors to improve their performance. This has made them prime candidates for increasing the energy efficiency of electric motors, especially given concerns regarding energy conservation. Now manufacturers of electrical steels have been prompted to seek increasingly efficient electrical steels to provide a more competitive product. This literature review focuses on one specific metallurgical aspect – the defining trait of electrical steels; silicon content and its resulting influence on the physical properties. From the literature review it is concluded that the application requirement and functionality must be considered thoroughly when deciding silicon content. This review was submitted as part of the 2017 Materials Literature Review Prize of the Institute of Materials, Minerals and Mining run by the Editorial Board of MST. Sponsorship of the prize by TWI Ltd is gratefully acknowledged

Laser Additively Manufactured Magnetic Core Design and Process for Electrical Machine Applications

“…The table is Energies 2022, 15, 3665 3 of 26 color-coded to correlate better the most impactful physical phenomena associated with each material property. As a rule of thumb, eliminating impurities and internal stresses in crystalline [13][14][15][16][17][18][19][20][21][22][23][24] soft magnetic materials leads to more useful magnetic properties. This is why annealing is critical in the magnetic steel preparation process, enabling decarburization (in a specific process environment), stress relaxation/grain structure recovery (at low temperature), and recrystallization/grain growth (at high temperature).…”

“…Energies 2022, 15, x FOR PEER REVIEW 4 of 26 croscopic eddy currents arising from the domain wall motion-with smaller grains; reduced microscopic eddy currents are generated [19]. (g) With silicon content above 3%, the brittleness of steels is increased substantially [20]. Ultimate yield strength of steel has been shown to be relatively insensitive to significant porosity content [21], but highly sensitive to any cracking/delamination [22].…”

On the Possible Anomaly of Asymmetric Weight Reduction of Gyroscopes under Rotation

“…The dimensionless parameter G can be interpreted as a gain and it was suitably added in the equation in order to make compatible the spins response to the applied magnetic field, that is, to better fit the spins-orienting energy behavior and force, as explained before. The relation G = µ max / µ min between the maximum permeability of the typical silicon-steel ( [31][32][33]. There is a relation between the variation of the permeability µr and the variation of the magnetic field applied according to the current going into DC electric motor.…”

The effects of Si‐ion implantation and preoxidation on the corrosion behavior of a new steel SIMP in 550∘C ${\bf{55}}{{\bf{0}}}^{\circ }{\bf{C}}$ lead‐bismuth eutectic

“…As mentioned above, SIMP is a steel with high Si content, and S1 SIMP sample has undergone Si implantation and then exposure to high-temperature LBE at 550 ∘ C. Si ions, including the intrinsic, probably diffused inward and combined with elements such as iron, carbon, and oxygen to form precipitates which might potentially lead to embrittlement during the corrosion. [37][38][39] Some evidence may be found in ODZ region where two sharp Si peaks are present. From this point of view, we may assume that the implantation didn't improve the corrosion resistance and instead, the S layer was more prone to embrittlement with the addition of extrinsic Si ions.…”