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1

Modeling of the formation of AlN precipitates during solidification of steel

Kalisz D., Rzadkosz S.

Archives of Foundry Engineering

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2013

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Vol. 13, iss. 1

63--68

EN

The study was carried out computer simulations of the formation process of AlN precipitates in the solidification of steel. The chemical composition of steel and non-metallic inclusions formed was determined using the commercial software FactSage. Calculated amount of precipitates formed during cooling of steel between the liquidus and solidus temperatures under conditions of thermodynamic equilibrium. In parallel, the computations were performed using your own computer program. It was found that aluminum nitride is formed at the final stage of solidification, and the condition of its formation is low oxygen content in steel.

2

Measurement of Vector Hysteretic Property of Silicon Steel Sheets at Liquid Nitrogen Temperature

Miyamoto M., Matsuo T., Nakamura T.

Przegląd Elektrotechniczny

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2011

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R. 87, nr 9b

111-114

EN

This article reports vector magnetic properties of non-oriented silicon steel sheets at the liquid nitrogen temperature of 77 K. The amplitude of magnetic field decreases at 77 K under alternating and rotational flux conditions when B is large. The iron loss increases at 77 K because of the increase in eddy-current loss due to the increase in electrical conductivity.

PL

W artykule przedstawiono badania blachy elektrotechnicznej niezorientowanej w temperaturze ciekłego azotu 77 K. Straty mocy w tej temperaturze wzrastają na skutek wzrostu prądów wirowych spowodowanego zwiększeniem przewodności elektrycznej.

3

Rotational or alternating magnetostriction as a result of rotational magnetization - fundamental aspects

Pfutzner H., Krell Ch.

Przegląd Elektrotechniczny

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2005

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R. 81, nr 5

45-47

EN

This paper discusses the basic behavior of different types of soft magnetic materials with respect to magnetostriction as resulting from rotational magnetization. Isotropic amorphous and crystalline materials prove to yield a rotation of the main axis of magnetostrictive strain. On the other hand, anisotropic Goss textured materials show a fixed axis as in the case of alternating magnetization. Easily, the fundamental differences can be explained on the basis of domain theory. The results yield also different mechanisms of vibration of magnetic cores with respect to generation of audible noise.

PL

Opisano właściwości różnych materiałów magnetycznie miękkich z uwzględnieniem magnetostrykcji spowodowanej magnesowaniem rotacyjnym. W izotropowych materiałach amorficznych i krystalicznych oś naprężeń obraca się wraz z polem magnesującym W materiałach anizotropowych o teksturze Gossa oś jest stała w przypadku przemiennego magnesowania. Ta różnica może być wyjaśniona na podstawie teorii domenowej. Rezultaty badań pokazują różny mechanizm drgań rdzeni i wytwarzania słyszalnego brzęczenia.

4

Decomposition of austenite formed at the temperature range of A3-A1 in A 0.2C-1.5Mn-1.5Si steel during isothermal annealing at 350-420 degrees centigrade.

Pietrzyk J., Osuch W., Kruk A., Michta G.

Inżynieria Materiałowa

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1998

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R. XIX, nr 3

307-314

EN

The present study has been undertaken in order to examine the kinetics of the isothermal transformation of the austenitic region at temperature range of 350-420 degrees centigrade in low carbon silicon manganese steel after annealing in two-phase region (A1-A2). Carefully designed control-cooling and isothermal bainite transformation allows to obtain a multiphase steel containing retained austenite (8-12%) susceptible to transformation - induced plasticity (TRIP effect). Mechanical properties and microstructural studies of steel after various stages of isothermal transformation were performed.