Effects of asymmetric rolling process on ridging resistance of ultra-purified 17%Cr ferritic stainless steel

In ferritic stainless steels, a significant non-uniform recrystallization orientation and a substantial texture gradient usually occur, which can degrade the ridging resistance of the final sheets. To improve the homogeneity of the recrystallization orientation and reduce the texture gradient in ult...

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Bibliographic Details
Published in:International journal of minerals, metallurgy and materials metallurgy and materials, 2018-02, Vol.25 (2), p.216-225
Main Authors: Lu, Cheng-zhuang, Li, Jing-yuan, Fang, Zhi
Format: Article
Language:English
Subjects:
Asymmetry
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Cold rolling
Composites
Corrosion and Coatings
Edge dislocations
Ferritic stainless steel
Ferritic stainless steels
Glass
Homogeneity
Inhomogeneity
Materials Science
Metallic Materials
Microtexture
Natural Materials
Orientation
Recrystallization
Ridging
Shear bands
Shear deformation
Surfaces and Interfaces
Thickness
Thin Films
Tribology
不对称
不锈钢
铁酸盐
滚动
隆起
净化
结晶取向
厚度方向
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Summary:In ferritic stainless steels, a significant non-uniform recrystallization orientation and a substantial texture gradient usually occur, which can degrade the ridging resistance of the final sheets. To improve the homogeneity of the recrystallization orientation and reduce the texture gradient in ultra-purified 17%Cr ferritic stainless steel, in this work, we performed conventional and asymmetric rolling processes and conducted macro and micro-texture analyses to investigate texture evolution under different cold-rolling conditions. In the conventional rolling specimens, we observed that the deformation was not uniform in the thickness direction, whereas there was homogeneous shear deformation in the asymmetric rolling specimens as well as the formation of uniform recrystallized grains and random orientation grains in the final annealing sheets. As such, the ridging resistance of the final sheets was significantly improved by employing the asymmetric rolling process. This result indicates with certainty that the texture gradient and orientation inhomogeneity can be attributed to non-uniform deformation, whereas the uniform orientation gradient in the thickness direction is explained by the increased number of shear bands obtained in the asymmetric rolling process.
ISSN:1674-4799
1869-103X
DOI:10.1007/s12613-018-1564-0