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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Liu, Wenqi
Aalto University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2022Dynamic strain aging in DP1000 : effect of temperature and strain ratecitations
- 2022Dynamic strain aging in DP1000: Effect of temperature and strain ratecitations
- 2022Strain rate dependent plasticity and fracture of DP1000 steel under proportional and non-proportional loadingcitations
- 2022Numerical modelling of the dynamic plasticity and fracture behaviour of X70 pipeline steel
- 2021Anisotropic plastic behavior of additively manufactured PH1 steelcitations
- 2019Thermal effects on the dynamic damage and fracture of a dual phase automotive steel
- 2018Dynamic fracture of a pipeline steel
- 2018Plasticity and failure behavior modeling of high-strength steels under various strain rates and temperatures : microstructure to componentscitations
- 2017Design of an experimental program to assess the dynamic fracture properties of a dual phase automotive steelcitations
- 2017Integrated material modelling on the crashworthiness of automotive high strength steel sheets
- 2017Dynamic Fracture Behavior of High Strength Pipeline Steelcitations
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article
Dynamic strain aging in DP1000: Effect of temperature and strain rate
Abstract
<p>The present study reports on an extensive experimental campaign performed to identify the occurrence of dynamic strain aging (DSA) in a fine-grained DP1000 steel. Tensile tests are performed covering 7 orders of strain rate, i.e., 0.0001 s<sup>-1</sup> to 1080 s<sup>-1</sup>, and temperatures ranging from −40 °C to 400 °C. The test results are thoroughly analysed with particular attention to typical features of DSA, such as serrated flow, thermal hardening, negative strain rate sensitivity and blue brittleness. In addition to the plastic strain, DSA is sensitive to both temperature and strain rate. DSA effects are most dominant at higher temperatures and lower strain rates. However, even at the highest strain rate, traces of DSA are found in DP1000. At temperatures below 100 °C, no DSA is observed. The way and extent to which DSA manifests itself depend on the specific combination of temperature and strain rate. Analysis of the serrations stimulate the hypothesis that quasi-periodic dislocation cells might lie at their origin. In addition, scanning electron microscopy images of the fracture surfaces reveal finer and shallower dimples with flat features in the dynamic strain aging regime.</p>