Low-cycle fatigue behaviour and microstructural evolution of pearlitic and bainitic steels

Bogusława Adamczyk-Cieślak , Milena Koralnik , Roman Kuziak , Tomasz Brynk , Tomasz Zygmunt , Jarosław Mizera

Abstract

Microstructural analysis of new bainitic steel subject to heat treatment was performed and directly compared with those achieved from the microstructure of R-260 pearlitic rail steel. Mechanical properties, fracture behaviour, and low-cycle fatigue (LCF) tests of the bainitic steel were also evaluated and collated with those achieved from pearlitic rail steel. The LCF tests were performed at room temperature at varying strain amplitudes under total strain control. The basic characteristics of the relationship between the low - cycle fatigue parameters of steels were evaluated based on the Coffin–Manson formula. The obtained test results demonstrate that the two microstructures exhibit different cyclic stress responses, i.e. the cyclic strengthening of pearlitic steel and a cyclic softening in bainitic steel. The variations in the amount of retained austenite in the bainitic structure, before and after LCF, were evaluated by X-ray diffraction and electron transmission microscopy(TEM). The results indicate that during deformation, a partial transformation of the residual austenite into the deformed martensiteα' has taken place. Moreover, the quasi-cleavage character of the fracture surface was observed for bainitic steel with a higher deformation degree during the LCF test.
Author Bogusława Adamczyk-Cieślak (FMSE / DMD)
Bogusława Adamczyk-Cieślak,,
- Division of Materials Design
, Milena Koralnik (FMSE / DMD)
Milena Koralnik,,
- Division of Materials Design
, Roman Kuziak - Instytut Metalurgii Żelaza [Institute for Ferrous Metallurgy]
Roman Kuziak,,
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, Tomasz Brynk (FMSE / DMD)
Tomasz Brynk,,
- Division of Materials Design
, Tomasz Zygmunt - ArcelorMittal Poland S.A. [ArcelorMittal]
Tomasz Zygmunt,,
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, Jarosław Mizera (FMSE / DMD)
Jarosław Mizera,,
- Division of Materials Design
Journal seriesMaterials Science and Engineering A-Structural Materials Properties Microstructure And Processing, ISSN 0921-5093, (A 35 pkt)
Issue year2019
Vol747
Pages144-153
Publication size in sheets0.5
Keywords in PolishZmęczenie niskocyklowe, stal bainityczna, stal perlityczna, martenzyt
Keywords in EnglishLow-cycle fatigue, bainitic steel, pearlitic steel, martensite
ASJC Classification2210 Mechanical Engineering; 2211 Mechanics of Materials; 3104 Condensed Matter Physics; 2500 General Materials Science
DOIDOI:10.1016/j.msea.2019.01.043
URL https://www.elsevier.com/locate/msea
Languageen angielski
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Low-cycle fatigue behaviour and microstructural evolution of pearlitic and bainitic steels.pdf 4.83 MB
Score (nominal)35
ScoreMinisterial score = 35.0, 29-07-2019, ArticleFromJournal
Publication indicators WoS Citations = 2; Scopus Citations = 2; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 1.943; WoS Impact Factor: 2017 = 3.414 (2) - 2017=3.478 (5)
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