A comparative assessment of cyclic deformation behavior of SA333 Gr-6 steel at ambient and elevated temperatures
IR@NML: CSIR-National Metallurgical Laboratory, Jamshedpur
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| Title |
A comparative assessment of cyclic deformation behavior of SA333 Gr-6 steel at ambient and elevated temperatures
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| Creator |
Kumar, G
Kumar, Ashok Bar, H N Sivaprasad, S |
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| Subject |
Steel Metallurgy
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| Description |
The aim of this investigation is to study the comparative cyclic deformation behavior of SA333 Gr-6 steel at two different temperatures. Strain-controlled low cycle fatigue experiments were carried out at 1 × 10–3 s–1 strain rate at room temperature and 300 °C. Cyclic hardening of the steel was observed at both the temperatures. However, greater cyclic hardening was observed at 300 °C for all the strain amplitudes. Non-Masing behavior was observed at both the temperatures. Greater deviation from Masing behavior was observed at 300 °C due to generation of more dislocation activities. Higher dislocation density and sub-cell structure formation is associated with the hardening characteristic of the material. Lower fatigue lives were observed for all strain amplitudes at 300 °C in comparison to room temperature. This is due to the deleterious effect of dynamic strain aging, which is activated at 300 °C. The fracture surface reveals that with an increase in strain amplitude the number of crack initiation sites increases and the region decreases, which leads to a reduction in fatigue life.
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| Publisher |
Carl hanser verlag
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| Date |
2019-11
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| Type |
Article
PeerReviewed |
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| Relation |
https://doi.org/10.3139/146.111840
http://eprints.nmlindia.org/8070/ |
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| Identifier |
Kumar, G and Kumar, Ashok and Bar, H N and Sivaprasad, S (2019) A comparative assessment of cyclic deformation behavior of SA333 Gr-6 steel at ambient and elevated temperatures. International Journals of Material Research, 110(11) . pp. 1000-1009.
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