New insights on recovery and early recrystallization of ferrite-pearlite banded cold rolled high strength steels by high speed nanoindentation mapping

Janakiram, S. and Phani, P. Sudharshan and Ummethala, Govind and Malladi, Sai Rama Krishna and et al, . (2021) New insights on recovery and early recrystallization of ferrite-pearlite banded cold rolled high strength steels by high speed nanoindentation mapping. Scripta Materialia, 194. pp. 1-5. ISSN 1359-6462

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Abstract

This work unravels structure-property correlations at the micrometer length scale during recovery and early recrystallization of a cold rolled high strength steel comprised of ferrite and pearlite. High resolution nano-indention mapping is used to measure the hardness of ferrite, pearlite and the transition zone between them, which correlates well with the local microstructure obtained from scanning and transmission electron microscopy. A clustering algorithm is used to determine the properties of the constituent microstructural features. The variation in the hardness of the phases with annealing temperature agrees well with the dislocation activity observed using Transmission Electron Microscopy (TEM) and a simple mechanism to reconcile the observations is presented. © 2020 Acta Materialia Inc.

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IITH Creators:

IITH Creators	ORCiD
Malladi, Sai Rama Krishna	https://orcid.org/0000-0002-0322-8137

Item Type:

Article

Additional Information:

The authors would like to thank Tata Steel Research, Development and Technology (RD&T), IJmuiden, The Netherlands for supplying the materials and DST FIST and DST PURSE for funding instrumentation facility (FESEM-EBSD). SJ's contribution to this work was supported by University Grants Commission (UGC), Government of India through the NFHE-ST fellowship.

Uncontrolled Keywords:

Annealing; Deconvolution; DP steel; Hardness; Nanoindentation

Subjects:

Materials Engineering > Materials engineering

Divisions:

Department of Material Science Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

10 Sep 2022 09:13

Last Modified:

10 Sep 2022 09:13