1,721,260 research outputs found
Effects of pre-deformation on edge cracks of non-oriented electrical steels during cold rolling
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Final Thickness Reduction, Bulk Contents of Sulfur and Aluminum, Development of Cube + Goss Texture and Magnetic Properties in Fe-3.1wt.%Si-0.1wt.%Mn Steels
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Evolution of Textures and Microstructures in Low-Reduction Rolled and Annealed Low-Carbon Steels
No full textA study has been made of the evolution of the microstructures and textures in three kinds of low-carbon steel sheets (MAFE, BH and IF) having well developed //ND texture that were rolled by low reductions and annealed at 780 degrees C in Ar atmosphere. The steel sheets developed different microstructures and textures, even though their initial textures and thermomechanical treatments were similar. MAFE steel showed an unusual behavior that grains with high Taylor factors survived and grew very rapidly. This unusual behavior and the differences in microstructure and texture have been discussed.1117sciescopu
Effect of Al Contents on Magnetic Domain Structures of {100} Grains in Electrical Steels
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Influences of Carbon and Silicon on Blister Formation in Scale Surface During High Temperature Oxidation of Carbon Steels
No full textThe in-situ blistering phenomena of the scale ‘surface’ was investigated on three carbon steels with respect to carbonand silicon concentrations, such as 0.05 wt%C, 0.2 wt%C, and 0.2 wt%C-0.2 wt%Si. The oxidation and blisteringkinetics and blister area fraction during high temperature oxidation were analyzed. The average thickness ofthe surface scale by oxidation during isothermal holding from 800 to 1200°C in dry air was observed to decreasewhen the amount of carbon increased and/or when Si was inserted additionally. Thus, the blistering behaviordepended primarily on a change in oxidation temperature (Tox) as well as amounts of carbon and silicon in thematrix. It is also revealed that such blister formation would be triggered by growth of internal stress and active generationsof CO and/or CO2 gases at the interface between the scale and matrix since carbon would result in anincrease in the blister formation by generating CO and/or CO2 gas. In addition, silicon might play an important rolein preventing the blister formation at Tox below 900°C by reducing the thickness of the surface scale whilst siliconmight enhance the blister formation by means of the appreciable micro-void formation in the scale layer at Toxhigher 900 °C.110Nsciescopuskc
Final Thickness Reduction and Development of Goss texture in C- and Al-free Fe-3%Si-0.1%Mn-0.012%S Electrical Steel
No full textThe correlation between final thickness reduction and development of Goss texture has been investigated in a C- and Al-free Fe-3%Si electrical steel. During final annealing, the annealing texture is transited from {110}aSND to {100}aSND texture with increasing final thickness reduction. This is due to the decrease in primary grain size after pre-annealing with increasing final thickness reduction which accelerates the selective growth rate of the {100} grains at the expense of the other {hkl} grains. At an optimal final thickness reduction of 75.8%, the high magnetic induction of 1.95 Tesla, which arises from the sharp {110} Goss texture and is comparable to that of conventional grain-oriented electrical steels, is obtained from the C- and Al-free Fe-3%Si-0.1%Mn electrical steel. Such a high magnetic property is produced through the surface-energy-induced selective grain growth of the Goss grains under the lower surface-segregated condition of sulfur which makes the surface energy of the {110} plane lowest among the {hkl} planes.111sciescopuskc
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