University of Oulu

Li, Y., Xiong, Y., Zhou, T., Singh, H., Kömi, J. and Huttula, M. (2021), Impacts of Warm Equal-Channel Angular Pressing on Microstructure and Mechanical Properties of Granular Pearlitic Steel. steel research int., 92: 2000496. https://doi.org/10.1002/srin.202000496

Impacts of warm equal-channel angular pressing on microstructure and mechanical properties of granular pearlitic steel

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Author: Li, Yong1; Xiong, Yi2; Zhou, Tian2;
Organizations: 1Central Iron & Steel Research Institute Beijing 100081, China
2School of Materials Science and Engineering Henan University of Science and Technology Luoyang 471023, China
3Nano and Molecular Systems Research Unit University of Oulu FIN-90014, Finland
4Materials and Mechanical Engineering Center for Advanced Steels Research University of Oulu FIN-90014, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.8 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe2021070140816
Language: English
Published: John Wiley & Sons, 2021
Publish Date: 2021-11-17
Description:

Abstract

Equal-channel angular pressing (ECAP) of granular pearlite high-carbon steel at 650 °C via the Bc route is thoroughly investigated. Together with microstructural evolution investigated through scanning and transmission electron microscopies, microtensile and microhardness testing are conducted for their mechanical properties. After four passes of warm deformation, the formed ultra-microduplex structure is found to contain both ferrite grains of size ≈0.45 μm and cementite particles with the diameter of ≈0.3 μm. The corresponding microhardness and tensile strength are observed to increase first, followed by a decrement with the number of deformations passes. Meanwhile, yield strength and yield ratio increase with the ECAP passes, along with a slight decrease in elongation. The fracture morphology also changes from many deep dimples before ECAP to many small dimples after ECAP application, denoting a typical ductile fracture of the pearlitic steel.

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Series: Steel research international
ISSN: 1611-3683
ISSN-E: 1869-344X
ISSN-L: 1611-3683
Volume: 92
Issue: 4
Article number: 2000496
DOI: 10.1002/srin.202000496
OADOI: https://oadoi.org/10.1002/srin.202000496
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Subjects:
Funding: The authors acknowledge the financial supports by the National Natural Science Foundation of China under grants nos. U1804146 and 51801054. The authors also acknowledge the support by the Foreign Experts and Talent Introduction Project in Henan Province (HNGD2020009) and the Science and Technology Innovation Team of Henan University of Science and Technology (2015XTD006). The author from University of Oulu also acknowledges financial support from the Academy of Finland (311934).
Academy of Finland Grant Number: 311934
Detailed Information: 311934 (Academy of Finland Funding decision)
Copyright information: © 2020 Wiley-VCH GmbH. This is the peer reviewed version of the following article: Li, Y., Xiong, Y., Zhou, T., Singh, H., Kömi, J. and Huttula, M. (2021), Impacts of Warm Equal-Channel Angular Pressing on Microstructure and Mechanical Properties of Granular Pearlitic Steel. steel research int., 92: 2000496, which has been published in final form at https://doi.org/10.1002/srin.202000496. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.