Insights on early recovery kinetics in ferrite - pearlite cold rolled high strength sheet steels

Janakiram, S. and Phani, P. Sudharshan and Ummethala, Govind and Jagdeesh, Hima Viswa and Malladi, Sai Rama Krishna and et al, . (2022) Insights on early recovery kinetics in ferrite - pearlite cold rolled high strength sheet steels. Materials Characterization, 193. pp. 1-14. ISSN 1044-5803

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Abstract

This study presents the results of temperature and composition dependent recovery behavior of ferrite-pearlite high strength steels. Annealing of cold rolled sheets at 300 °C with varying pearlite fractions results in an increase in hardness that scales with the pearlite content. In contrast, annealing at 500 °C results in a decrease in hardness, independent of pearlite content. By coupling complementary techniques such as high resolution nanoindentation mapping and electron microscopy (EBSD and TEM), microstructure-property correlations at the micrometer length scale are established to provide new insights on the driving force for temperature and composition dependent recovery kinetics. Simple recovery models are also discussed to complement the microstructural observations. Collectively, these results offer insights into the role of individual phases in the early recovery of ferrite-pearlite high strength steels that are critical for subsequent processing steps including inter-critical annealing. © 2022

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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:

Cold-rolled; Ferrite-pearlite; Ferrite-pearlite steel; High strength ferrite- pearlite steel; High strength sheets; High-strength; High-strength steels; Recovery kinetics; Static recovery; Static recovery kinetic

Uncontrolled Keywords:

electron microscopy; Hardness; High strength ferrite- pearlite steels; Static recovery kinetics

Subjects:

Materials Engineering > Materials engineering

Divisions:

Department of Material Science Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

13 Oct 2022 12:48

Last Modified:

13 Oct 2022 12:48