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

Kalle Jalava; Jarkko Laine; Joona Vaara; Tero Frondelius; Juhani Orkas

doi:10.1080/02670836.2019.1685760

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

Kalle Jalava, Jarkko Laine, Joona Vaara, Tero Frondelius, Juhani Orkas

Department of Energy and Mechanical Engineering

Research output: Contribution to journal › Article › Scientific › peer-review

5 Citations (Scopus)

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. © 2019, © 2019 Institute of Materials, Minerals and Mining.

Original language	English
Pages (from-to)	160-167
Number of pages	8
Journal	Materials Science and Technology
Volume	36
Issue number	2
Early online date	5 Nov 2019
DOIs	https://doi.org/10.1080/02670836.2019.1685760
Publication status	Published - 22 Jan 2020
MoE publication type	A1 Journal article-refereed

Keywords

Cast iron
cyclic testing
ductile iron
dynamic strain aging
elevated temperature
ferrite
ferritic-pearlitic
pearlite

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10.1080/02670836.2019.1685760

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title = "Investigation on dynamic strain aging behaviour of ferritic-pearlitic ductile cast irons",

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. {\textcopyright} 2019, {\textcopyright} 2019 Institute of Materials, Minerals and Mining.",

keywords = "Cast iron, cyclic testing, ductile iron, dynamic strain aging, elevated temperature, ferrite, ferritic-pearlitic, pearlite",

author = "Kalle Jalava and Jarkko Laine and Joona Vaara and Tero Frondelius and Juhani Orkas",

year = "2020",

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T1 - Investigation on dynamic strain aging behaviour of ferritic-pearlitic ductile cast irons

AU - Jalava, Kalle

AU - Laine, Jarkko

AU - Vaara, Joona

AU - Frondelius, Tero

AU - Orkas, Juhani

PY - 2020/1/22

Y1 - 2020/1/22

N2 - 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. © 2019, © 2019 Institute of Materials, Minerals and Mining.

AB - 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. © 2019, © 2019 Institute of Materials, Minerals and Mining.

KW - Cast iron

KW - cyclic testing

KW - ductile iron

KW - dynamic strain aging

KW - elevated temperature

KW - ferrite

KW - ferritic-pearlitic

KW - pearlite

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DO - 10.1080/02670836.2019.1685760

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VL - 36

SP - 160

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JO - Materials Science and Technology

JF - Materials Science and Technology

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ER -

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

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