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허남회,G. G. Yoon 대한금속·재료학회 2010 METALS AND MATERIALS International Vol.16 No.2
The solubility of sulfur is calculated in 0.1 %Mn-added 3 %Si-Fe alloys. The segregation kinetics of sulfur is compared in the alloy containing 95 ppm sulfur, depending on the annealing atmosphere. The effects of pre-annealing and annealing atmosphere on final annealing texture are investigated. Segregation behaviors of sulfur at free surfaces and grain boundaries are compared and, during the selective growth, the importance of the grain boundary concentration of sulfur is emphasized. Finally, a correlation between the development of the annealing texture and segregation kinetics of sulfur in the alloy strip is discussed.
오은지,허남회,구양모 대한금속·재료학회 2017 METALS AND MATERIALS International Vol.23 No.6
The correlation between final thickness reduction and development of Goss texture has been investigated in a CandAl-free Fe-3%Si electrical steel. During final annealing, the annealing texture is transited from {110}⊥ND to{100}⊥ND texture with increasing final thickness reduction. This is due to the decrease in primary grain size afterpre-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 magneticinduction of 1.95 Tesla, which arises from the sharp {110}<001> Goss texture and is comparable to that of conventionalgrain-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 Gossgrains under the lower surface-segregated condition of sulfur which makes the surface energy of the {110} planelowest among the {hkl} planes.