Hot Deformation Behavior of Fe-2%Si
SCIE
SCOPUS
- Title
- Hot Deformation Behavior of Fe-2%Si
- Authors
- Kyu Seok HAN; Tae Jin SONG; De Cooman, BC
- Date Issued
- 2013-02
- Publisher
- ISIJ
- Abstract
- The hot deformation behavior of a high purity binary ferritic Fe-2 mass% Si alloy, undergoing no phase transformation or precipitation reactions, was investigated by hot torsion tests. The parameters for the constitutive equation of Fe-2 mass% Si steel were experimentally determined from the stress-strain curves. The activation energy for hot deformation was close to that for lattice self-diffusion in alpha-Fe, indicating that hot deformation of Fe-2 mass% Si steel occurs by a thermally-activated, diffusion-controlled dislocation climb mechanism. The electron backscattering diffraction technique and transmission electron microscopy were used to analyze the microstructural changes occurring during hot deformation. It was found that the hot deformed microstructure consisted of equiaxed crystallites surrounded by a high proportion of high angle boundaries. These boundaries were homogeneously distributed in the microstructure. A gradual increase in the fraction of boundaries with a misorientation in the range of 100 to 18 was observed in samples obtained from interrupted torsion tests. The formation of high angle boundaries at temperatures above 0.5T(m) is attributed to a gradual increase of the misorientation of low angle boundaries by the absorption of dislocations.
- Keywords
- hot deformation; constitutive equation; dislocation climb; continuous dynamic recrystallization; CONTINUOUS DYNAMIC RECRYSTALLIZATION; HIGH-TEMPERATURE DEFORMATION; GRAIN-BOUNDARY DISLOCATIONS; LARGE-STRAIN DEFORMATION; ALPHA-IRON; STAINLESS-STEEL; SELF-DIFFUSION; SILICON STEEL; PERCENT SI; ALUMINUM
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/15448
- DOI
- 10.2355/ISIJINTERNATIONAL.53.294
- ISSN
- 0915-1559
- Article Type
- Article
- Citation
- ISIJ International, vol. 53, no. 2, page. 294 - 303, 2013-02
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- There are no files associated with this item.
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