University of Oulu

Khajesarvi A, Banadkouki SSG, Sajjadi SA, Somani MC. Abnormal Trend of Ferrite Hardening in a Medium-Si Ferrite-Martensite Dual Phase Steel. Metals. 2023; 13(3):542.

Abnormal tend of ferrite hardening in a medium-Si ferrite-martensite dual phase steel

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Author: Khajesarvi, Ali1; Banadkouki, Seyyed Sadegh Ghasemi1; Sajjadi, Seyed Abdolkarim2;
Organizations: 1Mining Technologies Research Center, Department of Mining and Metallurgical Engineering, Yazd University, Yazd 98195, Iran
2Department of Materials Science and Engineering, Ferdowsi University of Mashhad, Mashhad 91775, Iran
3Materials and Mechanical Engineering, Centre for Advanced Steels Research, University of Oulu, 90014 Oulun Yliopisto, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 4 MB)
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Language: English
Published: Multidisciplinary Digital Publishing Institute, 2023
Publish Date: 2023-09-25


In this paper, the effects of carbon, Si, Cr and Mn partitioning on ferrite hardening were studied in detail using a medium Si low alloy grade of 35CHGSA steel under ferrite-martensite/ferrite-pearlite dual-phase (DP) condition. The experimental results illustrated that an abnormal trend of ferrite hardening had occurred with the progress of ferrite formation. At first, the ferrite microhardness decreased with increasing volume fraction of ferrite, thereby reaching the minimum value for a moderate ferrite formation, and then it surprisingly increased with subsequent increase in ferrite volume fraction. Beside a considerable influence of martensitic phase transformation induced residual compressive stresses within ferrite, these results were further rationalized in respect of the extent of carbon, Si, Cr and Mn partitioning between ferrite and prior austenite (martensite) microphases leading to the solid solution hardening effects of these elements on ferrite.

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Series: Metals
ISSN: 2075-4701
ISSN-E: 2075-4701
ISSN-L: 2075-4701
Volume: 13
Issue: 3
Article number: 542
DOI: 10.3390/met13030542
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Copyright information: © 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (