University of Oulu

Kalle Jalava, Jarkko Laine, Joona Vaara, Tero Frondelius & Juhani Orkas (2020) Investigation on dynamic strain aging behaviour of ferritic-pearlitic ductile cast irons, Materials Science and Technology, 36:2, 160-167, DOI: https://doi.org/10.1080/02670836.2019.1685760

Investigation on dynamic strain aging behaviour of ferritic-pearlitic ductile cast irons

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Author: Jalava, Kalle1; Laine, Jarkko2; Vaara, Joona2;
Organizations: 1Department of Mechanical Engineering, Aalto University, Espoo, Finland
2R&D and Engineering, Wärtsilä Finland Oy, Vaasa, Finland
3Materials and Mechanical Engineering, University of Oulu, Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 2.1 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe2022012510232
Language: English
Published: Informa, 2019
Publish Date: 2022-01-25
Description:

Abstract

The influence of ferritic and pearlitic microstructures to dynamic strain aging (DSA) of ductile iron was investigated by means of strain-controlled cyclic tests performed at temperatures ranging from room temperature to 450°C, strain rates of 10⁻⁵ to 10⁻² s⁻¹ and at three different strain amplitudes along with tensile tests. Results indicated that all tested microstructures exhibit strain aging effects at elevated temperatures in some form, similar to ferritic-pearlitic steels. Additionally, static tensile tests show hardening at intermediate temperatures, minima in elongation and serrations in stress–strain curves. Cyclic data indicates DSA related changes in stresses at 250°C and 350°C at smaller strain rates, while the effects become more suppressed at higher strain rates.

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Series: Materials science and technology
ISSN: 0267-0836
ISSN-E: 1743-2847
ISSN-L: 0267-0836
Volume: 36
Issue: 2
Pages: 160 - 167
DOI: 10.1080/02670836.2019.1685760
OADOI: https://oadoi.org/10.1080/02670836.2019.1685760
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Subjects:
Copyright information: © The Author(s) 2019. This is an Accepted Manuscript of an article published by Taylor & Francis in Materials Science and Technology on 05 Nov 2019, available online: http://www.tandfonline.com/10.1080/02670836.2019.1685760.