Effect of Reduction Sequence during Rolling on Deformed Texture and Anisotropy of Ferritic Stainless Steel

• Published in: Materials Vol. 16; no. 10; p. 3767
• Main Authors: Cho, Sang Heon, Lee, Young Jin, Bahanan, Warda, Oh, Jeong Moo, Kim, Dong-Ju, Kang, Jee-Hyun, Ryu, Jungho, Widiantara, I Putu, Ko, Young Gun
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 16.05.2023; MDPI
• Subjects: Anisotropy; Annealing; Deep drawing; Deformation; Deformation effects; Ferritic stainless steel; Ferritic stainless steels; Grain size; Microstructural analysis; Microstructure; Morphology; Recrystallization; Reduction; reduction sequence; rolling; Sequences; stainless steel; Texture; Thermomechanical treatment; rolling; reduction sequence; stainless steel; texture; anisotropy
• ISSN: 1996-1944; 1996-1944
• DOI: 10.3390/ma16103767

This investigation studied the effect of reduction sequence during rolling of ferritic stainless steel on texture and anisotropy. A series of thermomechanical processes were performed on the present samples utilizing rolling deformation, with a total height reduction of 83% but with different reduction sequences, 67% + 50% (route A) and 50% + 67% (route B). Microstructural analysis showed that no significant difference was found in terms of the grain morphology between route A and route B. In terms of the texture, as compared to route A, route B developed a sharper texture on all components along the γ-fiber and a considerably higher fraction of boundaries that displayed 38°111 misorientations with respect to the surrounding deformed grains. In consequence, optimal deep drawing properties were achieved, where was maximized and Δ was minimized. Moreover, despite the similar morphology between the two processes, the resistance toward ridging was improved in the case of route B. This was explained in relation to the selective growth-controlled recrystallization, which favors the formation of microstructure with homogeneous distribution of the //ND orientation.