J
Jean-François Witz
Researcher at university of lille
Publications - 87
Citations - 823
Jean-François Witz is an academic researcher from university of lille. The author has contributed to research in topics: Microstructure & Digital image correlation. The author has an hindex of 12, co-authored 74 publications receiving 589 citations. Previous affiliations of Jean-François Witz include University of Paris & Centre national de la recherche scientifique.
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Journal ArticleDOI
In situ 3D characterization of high temperature fatigue damage mechanisms in a cast aluminum alloy using synchrotron X-ray tomography
Sebastien Dezecot,Sebastien Dezecot,Sebastien Dezecot,Jean-Yves Buffiere,Alain Köster,Vincent Maurel,Fabien Szmytka,Eric Charkaluk,Nora Dahdah,Nora Dahdah,Ahmed El Bartali,Ahmed El Bartali,Nathalie Limodin,Jean-François Witz +13 more
TL;DR: In this article, Fatigue tests were performed at 250 °C on a cast AlSi7Cu3Mg aluminum alloy and monitored with Synchrotron in situ X-ray tomography in order to understand the micro-mechanisms of crack initiation and propagation.
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Influence of pores on crack initiation in monotonic tensile and cyclic loadings in lost foam casting A319 alloy by using 3D in-situ analysis
Long Wang,Nathalie Limodin,Ahmed El Bartali,Jean-François Witz,Rian Seghir,Jean-Yves Buffiere,Eric Charkaluk +6 more
TL;DR: In this article, the influence of lost foam casting microstructure on crack initiation in monotonic and cyclic tensile loadings was investigated using X-ray computed tomography (CT).
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Three-dimensional analysis of a compression test on stone wool
TL;DR: In this article, a full 3D study of a compression test on a sample made of stone wool is presented, which combines different tools, namely X-ray microtomography of an in situ experiment, image acquisition and treatment, and volume correlation.
Journal ArticleDOI
Damage Investigation in A319 Aluminium Alloy by X-ray Tomography and Digital Volume Correlation during In Situ High-Temperature Fatigue Tests
Nora Dahdah,Nathalie Limodin,A. El Bartali,Jean-François Witz,Rian Seghir,Eric Charkaluk,Jean-Yves Buffiere +6 more
TL;DR: In this paper, the authors analyzed the strain field heterogeneity in an aluminium alloy subjected to low-cycle fatigue at high temperature and showed the importance of hard intermetallic phases in the crack propagation.
Journal ArticleDOI
Interacting force estimation during blade/seal rubs
Romain Mandard,Jean-François Witz,Jean-François Witz,Xavier Boidin,Xavier Boidin,Jacky Fabis,Yannick Desplanques,Yannick Desplanques,J. Meriaux +8 more
TL;DR: In this article, the authors present an experimental methodology to estimate the blade-seal interacting force from indirect measurements, which has been applied to a short interaction produced on a dedicated test rig in conditions representative of the full-scale configuration.