J
Jonathan Cormier
Researcher at Institut Pprime
Publications - 168
Citations - 4157
Jonathan Cormier is an academic researcher from Institut Pprime. The author has contributed to research in topics: Superalloy & Creep. The author has an hindex of 32, co-authored 148 publications receiving 2836 citations. Previous affiliations of Jonathan Cormier include University of Poitiers & Centre national de la recherche scientifique.
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Journal ArticleDOI
The effect of chromium and cobalt segregation at dislocations on nickel-based superalloys
Paraskevas Kontis,Zhuangming Li,David M. Collins,Jonathan Cormier,Dierk Raabe,Baptiste Gault +5 more
TL;DR: In this paper, the segregation of solutes at dislocations in a polycrystalline and a single crystal nickel-based superalloy is studied, showing that pipe diffusion initiates the undesirable dissolution of γ' precipitates.
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Microstructural Evolutions During Thermal Aging of Alloy 625: Impact of Temperature and Forming Process
Lorena Mataveli Suave,Jonathan Cormier,Patrick Villechaise,Aurélie Soula,Zéline Hervier,Denis Bertheau,Johanne Laigo +6 more
TL;DR: In this article, microstructural evolutions occurring upon thermal aging of alloy 625 sheets were studied in the 823k to 1173k (550k to 900k) temperature range and for durations up to 2000 hours.
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Coarsening and dissolution of γ′ precipitates during solution treatment of AD730™ Ni-based superalloy: Mechanisms and kinetics models
TL;DR: In this article, the authors developed a semi-analytical model to describe the dissolution and coarsening processes of the Ni-based superalloy, AD730, and the results from the proposed models, supported by electron microscopy observations, indicate that dissolution occurs before complete dissolution.
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A microstructure-sensitive constitutive modeling of the inelastic behavior of single crystal nickel-based superalloys at very high temperature
J.-B. le Graverend,J.-B. le Graverend,Jonathan Cormier,F. Gallerneau,Patrick Villechaise,Serge Kruch,José Mendez +6 more
TL;DR: In this article, a model was developed by Cormier and Cailletaud (2010) to fulfill the effects of fast microstructure evolutions occurring upon high temperature non-isothermal loadings.
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Crack initiation mechanisms during very high cycle fatigue of Ni-based single crystal superalloys at high temperature
Alice Cervellon,Samuel Hémery,Philipp Kürnsteiner,Baptiste Gault,Baptiste Gault,Paraskevas Kontis,Jonathan Cormier +6 more
TL;DR: In this paper, a rough zone has been identified around the crack initiation site on the fracture surface and a crack initiation mechanism based on these observations and on the stress intensity parameter determined around the rough zone, which has been demonstrated to be a constant threshold dependent on the material.