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Microstructural str...
Microstructural strain mapping during in-situ cyclic testing of ductile iron
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- Kasvayee, Keivan Amiri, 1986- (författare)
- Jönköping University,JTH, Material och tillverkning,School of Engineering, Jönköping University, Sweden
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- Ghassemali, Ehsan, 1983- (författare)
- Jönköping University,JTH, Material och tillverkning,School of Engineering, Jönköping University, Sweden
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- Salomonsson, Kent (författare)
- Jönköping University,JTH, Material och tillverkning,School of Engineering, Jönköping University, Sweden
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- Sujakhu, Surendra (författare)
- Nanyang Technological University, School of Mechanical and Aerospace Engineering, Singapore
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- Castagne, Sylvie (författare)
- KU Leuven, Department of Mechanical Engineering, Celestijnenlaan, Leuven, Belgium / Member Flanders Make, Leuven, Belgium
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- Jarfors, Anders E.W. 1963- (författare)
- Jönköping University,JTH, Material och tillverkning,School of Engineering, Jönköping University, Sweden
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(creator_code:org_t)
- Elsevier, 2018
- 2018
- Engelska.
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Ingår i: Materials Characterization. - : Elsevier. - 1044-5803 .- 1873-4189. ; 140, s. 333-339
- Relaterad länk:
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https://hj.diva-port... (primary) (Raw object)
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- This paper focuses on local strain distribution in the microstructure of high silicon ductile iron during cyclic loading. In-situ cyclic test was performed on compact-tension (CT) samples inside the scanning electron microscope (SEM) to record the whole deformation and obtain micrographs for microstructural strain measurement by means of digital image correlation (DIC) technique. Focused ion beam (FIB) milling was used to generate speckle patterns necessary for DIC measurement. The equivalent Von Mises strain distribution was measured in the microstructure at the maximum applied load. The results revealed a heterogeneous strain distribution at the microstructural level with higher strain gradients close to the notch of the CT sample and accumulated strain bands between graphite particles. Local strain ahead of the early initiated micro-cracks was quantitatively measured, showing high strain localization, which decreased by moving away from the micro-crack tip. It could be observed that the peak of strain in the field of view was not necessarily located ahead of the micro-cracks tip which could be because of the (i) strain relaxation due to the presence of other micro-cracks and/or (ii) presence of subsurface microstructural features such as graphite particles that influenced the strain concentration on the surface.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
Nyckelord
- Digital image correlation
- Fatigue
- FIB_DIC
- Micro-crack
- Spherical graphite iron
- Computerized tomography
- Concrete aggregates
- Cyclic loads
- Ductility
- Fatigue of materials
- Graphite
- Image analysis
- Ion beams
- Iron
- Microstructural evolution
- Scanning electron microscopy
- Speckle
- Strain measurement
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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