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 |
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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 | |
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