Digital image correlation at high temperatures for fatigue and phase transformation studies

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dc.identifier.uri Holzweissig, Martin J. Kanagarajah, Pirabagini Maier, Hans Jürgen 2018-02-28T14:00:57Z 2018-02-28T14:00:57Z 2014
dc.identifier.citation Holzweissig, M.J.; Kanagarajah, P.; Maier, H.J.: Digital image correlation at high temperatures for fatigue and phase transformation studies. In: Journal of Strain Analysis for Engineering Design 49 (2014), Nr. 4, S. 204-211. DOI:
dc.description.abstract In this study, digital image correlation was used for two widely different cases to assess the potential and the limitations of the technique for applications at high temperatures. Specifically, digital image correlation was employed in high-temperature low-cycle fatigue experiments in a nickel-based superalloy and in phase transformation experiments conducted on bainitic steel in order to shed light on the microstructural processes. Depending on the type of experiments, the microstructure was characterized prior to the experiments (fatigue) or after the experiments (phase transformation). In the fatigue experiments, it was found that the features dominating damage evolution were the dendrites resulting from the solidification of the cast material. In the phase transformation experiments, variant selection is active when stresses are superimposed during the phase transformation process, which resulted in the evolution of transformation plasticity strains. Thereby, mainly the bainite variants oriented along the [101], [201] and [121] directions were observed to grow parallel to the loading axis, which in turn led to transformation plasticity strains. For validation of the digital image correlation data, average strains were calculated for the surface area probed and compared to strain values obtained by conventional extensometry. In all cases studied, the correlation was satisfactory, indicating that digital image correlation can provide for additional insight into processes active at the micro level. © 2013 IMechE. eng
dc.language.iso eng
dc.publisher London : SAGE Publications Ltd.
dc.relation.ispartofseries Journal of Strain Analysis for Engineering Design 49 (2014), Nr. 4
dc.rights Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
dc.subject digital image correlation eng
dc.subject fatigue eng
dc.subject High-temperature eng
dc.subject microstructure eng
dc.subject phase transformation eng
dc.subject Elasticity eng
dc.subject Experiments eng
dc.subject Fatigue of materials eng
dc.subject Image analysis eng
dc.subject Microstructure eng
dc.subject Phase transitions eng
dc.subject Strain eng
dc.subject Strain measurement eng
dc.subject Digital image correlations eng
dc.subject Fatigue experiments eng
dc.subject High temperature eng
dc.subject Low cycle fatigues eng
dc.subject Nickel- based superalloys eng
dc.subject Phase transformation process eng
dc.subject Transformation Plasticity eng
dc.subject Variant selection eng
dc.subject Fatigue damage eng
dc.subject.ddc 620 | Ingenieurwissenschaften und Maschinenbau ger
dc.title Digital image correlation at high temperatures for fatigue and phase transformation studies
dc.type article
dc.type Text
dc.relation.issn 0309-3247
dc.bibliographicCitation.issue 4
dc.bibliographicCitation.volume 49
dc.bibliographicCitation.firstPage 204
dc.bibliographicCitation.lastPage 211
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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