Cross-rolling mediated microstructure and texture evolution in severely cold-rolled and annealed ultrafine pearlite

Narayanswamy, S. and Saha, R. and Bhattacharjee, P.P. (2021) Cross-rolling mediated microstructure and texture evolution in severely cold-rolled and annealed ultrafine pearlite. Materials Characterization, 171 (110751). ISSN 10445803

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Effect of cross-rolling on the evolution of microstructure and texture in pearlite was investigated in the present work. For this purpose, near pearlitic steel was cold-rolled to 95% reduction by unidirectional cold-rolling (UCR) and different cross-rolling routes. The UCR processed material showed a predominantly lamellar structure, while the microstructure development in selected cross-rolled materials was featured by the presence of profuse shear bands and severely bent lamellae. While the UCR processed materials showed the presence of the typical RD (//〈110〉) and ND (//〈111〉) fibers, the texture formation in different cross-rolled materials was featured by the strong presence of a {001}〈110〉 component of the RD-fiber. The presence of the prominent {001}<110 > component could be explained by the stability of this component under cross-rolling. Recrystallization resulted in progressive spheroidization of the cementite. The pinning of the high angle boundaries by the cementite particles hindered the long-range migration of boundaries, thus inhibiting typical discontinuous recrystallization but favoring a recovery dominated softening process. The recrystallization textures in different cross-rolled materials were featured by the retention of deformation texture, namely the prominent {001}<110 > component of the RD-fiber, which amply corroborated a recovery dominated mechanism. Extended annealing resulted in the onset of abnormal grain growth in selected cross-rolled materials, which appeared to affect the microtexture, while the global texture remained mostly unaffected.

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IITH Creators:
IITH CreatorsORCiD
Narayanswamy, S.UNSPECIFIED
Bhattacharjee, Pinaki Prasad
Item Type: Article
Uncontrolled Keywords: Abnormal grain growth; Cementite particle; Deformation texture; Discontinuous recrystallization; High angle boundaries; Microstructure development; Processed materials; Recrystallization texture; Carbides; Cold rolled steel; Cold rolling; Grain growth; Lamellar structures; Metal cladding; Metal forming machines; Microstructural evolution; Pearlite; Recrystallization (metallurgy); Steel sheet
Subjects: Physics > Mechanical and aerospace
Materials Engineering > Materials engineering
Divisions: Department of Material Science Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 25 Jun 2021 04:29
Last Modified: 25 Jun 2021 04:29
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