Cyril Cayron
cyril.cayron@epfl.ch +41 21 695 44 56
Birth date: 05.09.1972
Microcity Contact
Phone: 021.695.44.56Mobile: 076.560.50.52
+41 21 695 44 56
EPFL
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SMX-ENS
EPFL STI IMX LMTM
MC A1 248 (Bâtiment MC)
Rue de la Maladière 71b, CP 526
2002 Neuchâtel 2
Web site: Web site: https://lmtm.epfl.ch/
Fields of expertise
Crystallography, Metallurgy, Phase Transformations, Group theory, Electron Microscopy, SEM, EBSD, TEM.
Biography
1992-1995 Engineering School. Ecole des Mines de Nancy.1994-1995 Master's degree in Materials Science (rank = 1st)
1995-1996 Military Service
1996-2000 PhD at EPFL-CIME. Precipitation in 6xxx alloys and composites.
2000-2014 Researcher, Engineer and Group leader on materials for new energies at CEA-Grenoble, France.
2012 Habilitation to supervise researches (HDR)
2014-now Senior Scientist at EPFL-LMTM
Creator of the computer programs GenOVa and ARPGE (in Python).
I currently work on crystallographic models of martensitic transformations and deformation twinning.
Current work
Crystallography of structural phase transformations.Martensitic transformation, deformation twinning.
Please go to https://www.researchgate.net/profile/Cyril_Cayron
Publications
Infoscience publications
Publications
Pinpointing the thermal history of lunar basaltic meteorites in a nutshell
Nature Communications. 2025. DOI : 10.1038/s41467-025-57652-6.Toward Architected Microstructures Using Advanced Laser Beam Shaping in Laser Powder Bed Fusion of Ti-6al-4v
ADVANCED FUNCTIONAL MATERIALS. 2025. DOI : 10.1002/adfm.202420427.The role of interaction work in martensite deformation
Scripta Materialia. 2025. DOI : 10.1016/j.scriptamat.2024.116433.Tailoring mechanical properties and microstructures in laser powder bed fusion of 316 L stainless steel through aluminium alloying and combined ex-situ and in-situ heat treatments
Additive Manufacturing. 2025. DOI : 10.1016/j.addma.2024.104620.Microstructure and texture evolution in laser Shock Peened martensitic NiTi shape memory alloy
Materials and Design. 2025. DOI : 10.1016/j.matdes.2024.113555.Zircon microstructures record high temperature and pressure conditions during impact melt evolution at the West Clearwater Lake impact structure, Canada
Earth and Planetary Science Letters. 2024. DOI : 10.1016/j.epsl.2024.118714.Hard-sphere model of the B2 → B19' phase transformation, and its application to predict the B19' structure in NiTi alloys and the B19 structures in other binary alloys
Acta Materialia. 2024. DOI : 10.1016/j.actamat.2024.119870.Monitoring of laser-induced fast recrystallization in SS-316L through synchrotron X-ray diffraction
Materials & Design. 2024. DOI : 10.1016/j.matdes.2023.112628.EBSD study of variant reorientation, texture, and twin formation in a martensitic NiTi alloy deformed in compression
Acta Materialia. 2023. DOI : 10.1016/j.actamat.2023.119553.In-situ selective laser heat treatment for microstructural control of additively manufactured Ti-6Al-4V
Additive Manufacturing. 2023. DOI : 10.1016/j.addma.2023.103882.Simple shear extrusion versus equal channel angular pressing: A comparative study on the microstructure and mechanical properties of an Mg alloy
Journal Of Magnesium And Alloys. 2023. DOI : 10.1016/j.jma.2023.05.006.Laser powder-bed fusion of a high entropy alloy with outstanding intrinsic mechanical properties
Journal Of Alloys And Compounds. 2023. DOI : 10.1016/j.jallcom.2023.169209.Response of magnesium microcrystals to c-axis compression and contraction loadings at low and high strain rates
Acta Materialia. 2023. DOI : 10.1016/j.actamat.2023.118762.An investigation on reorientation and textural evolution in a martensitic NiTi rolled sheet using EBSD
International Journal Of Plasticity. 2022. DOI : 10.1016/j.ijplas.2022.103468.The concept of axial weak twins
Acta Materialia. 2022. DOI : 10.1016/j.actamat.2022.118128.Effect of chromium content on microstructural evolution of CoNiAlW superalloy
Applied Physics A-Materials Science & Processing. 2022. DOI : 10.1007/s00339-022-05768-7.Thermally controlled growth of photoactive FAPbI(3) films for highly stable perovskite solar cells
Energy & Environmental Science. 2022. DOI : 10.1039/d2ee01196d.Evolution of deformation twinning mechanisms in magnesium from low to high strain rates
Materials & Design. 2022. DOI : 10.1016/j.matdes.2022.110646.Hot rocks: Constraining the thermal conditions of the Mistastin Lake impact melt deposits using zircon grain microstructures
Earth And Planetary Science Letters. 2022. DOI : 10.1016/j.epsl.2022.117523.Persistence of variant selection in red gold alloys
Journal Of Alloys And Compounds. 2022. DOI : 10.1016/j.jallcom.2021.163364.Understanding variant selection and texture in additively manufactured red-gold alloys
Scripta Materialia. 2022. DOI : 10.1016/j.scriptamat.2021.114490.Micro-addition of Fe in highly alloyed Cu-Ti alloys to improve both formability and strength
Materials & Design. 2022. DOI : 10.1016/j.matdes.2021.110340.A new method for lattice reduction using directional and hyperplanar shearing
Acta Crystallographica A-Foundation And Advances. 2022. DOI : 10.1107/S2053273321011037.A fast algorithm to find reduced hyperplane unit cells and solve N-dimensional Bezout's identities
Acta Crystallographica A-Foundation And Advances. 2021. DOI : 10.1107/S2053273321006835.Microstructural evolution and superplastic behavior of a fine-grained Mg-Gd-Y-Ag alloy processed by simple shear extrusion
Materials Science And Engineering A-Structural Materials Properties Microstructure And Processing. 2021. DOI : 10.1016/j.msea.2021.140803.Superplastic behavior of a severely deformed Mg-6Gd-3Y-0.5Ag alloy
Materials Science And Engineering A-Structural Materials Properties Microstructure And Processing. 2021. DOI : 10.1016/j.msea.2020.140616.Phase transformation induced distortions in red gold alloys
Lausanne, EPFL, 2021. DOI : 10.5075/epfl-thesis-8381.Diffraction artefacts from twins and stacking faults, and the mirage of hexagonal, polytypes or other superstructures
Scripta Materialia. 2020. DOI : 10.1016/j.scriptamat.2020.11.014.Solute-dislocation interactions and creep-enhanced Cu precipitation in a novel ferritic-martensitic steel
Acta Materialia. 2020. DOI : 10.1016/j.actamat.2020.05.054.Joining of Oxide Dispersion-Strengthened Steel Using Spark Plasma Sintering
Metals. 2020. DOI : 10.3390/met10081040.The thermally activated distortion with amplification effect and related variant selection in red gold alloys
Acta Materialia. 2020. DOI : 10.1016/j.actamat.2020.07.064.What EBSD and TKD Tell Us about the Crystallography of the Martensitic B2-B19′ Transformation in NiTi Shape Memory Alloys
Crystals. 2020. DOI : 10.3390/cryst10070562.van der Waals Epitaxy of Earth-Abundant Zn3P2 on Graphene for Photovoltaics
Crystal Growth & Design. 2020. DOI : 10.1021/acs.cgd.0c00125.Complements to Mugge and Friedel's Theory of Twinning
Metals. 2020. DOI : 10.3390/met10020231.Evidence of extensive lunar crust formation in impact melt sheets 4,330 Myr ago
Nature Astronomy. 2020. DOI : 10.1038/s41550-020-1092-5.Electron backscatter diffraction study of variant selection during ordering phase transformation in L1(0)-type red gold alloy
Journal Of Applied Crystallography. 2019. DOI : 10.1107/S1600576719011890.The transformation matrices (distortion, orientation, correspondence), their continuous forms and their variants (vol A75, pg 411, 2019)
Acta Crystallographica A-Foundation and Advances. 2019. DOI : 10.1107/S2053273319009276.On the chevron morphology of surface martensite
Acta Materialia. 2019. DOI : 10.1016/j.actamat.2019.08.021.Effect of powder characteristics and oxygen content on modifications to the microstructural topology during hot isostatic pressing of an austenitic steel
Acta Materialia. 2019. DOI : 10.1016/j.actamat.2019.03.038.Shock-produced high-pressure (La, Ce, Th)PO4 polymorph revealed by microstructural phase heritage of monazite
Geology. 2019. DOI : 10.1130/G46008.1.Experimental and theoretical investigation of crystallography and variant selection during massive transformation in Zr alloy
Philosophical Magazine. 2019. DOI : 10.1080/14786435.2019.1574408.Microstructures and Properties of Martensitic Materials
Crystals. 2019. DOI : 10.3390/cryst9030152.Effect of cooling conditions on microstructures and mechanical behaviors of reheated low-carbon weld metals
Materials Science And Engineering A-Structural Materials Properties Microstructure And Processing. 2019. DOI : 10.1016/j.msea.2018.12.035.Variant selection in martensitic steels
Lausanne, EPFL, 2019. DOI : 10.5075/epfl-thesis-9635.Morphological and Crystallographic Characteristics of alpha Structure in a Low-Carbon Iron-Nickel Alloy
Crystals. 2018. DOI : 10.3390/cryst8120468.Variant Selection in Fe-20Ni-1.8C under Bending
Crystals. 2018. DOI : 10.3390/cryst8120474.A one-step mechanism for new twinning modes in magnesium and titanium alloys modelled by the obliquity correction of a (58 degrees, a+2b) prototype stretch twin
Acta Crystallographica A-Foundation And Advances. 2018. DOI : 10.1107/S2053273317015042.The surprising influence of continuous alternating electric current on recrystallization behaviour of a cold-rolled Aluminium alloy
Materials Characterization. 2017. DOI : 10.1016/j.matchar.2017.04.036.{225} habit planes in martensitic steels: from the PTMC to a continuous model
Scientific Reports. 2017. DOI : 10.1038/srep40938.Hard-sphere displacive model of deformation twinning in hexagonal close-packed metals. Revisiting the case of the (56, a) contraction twins in magnesium
Acta Crystallographica A. 2017. DOI : 10.1107/S2053273317005459.Hard-sphere displacive model of extension twinning in magnesium
Materials and Design. 2017. DOI : 10.1016/j.matdes.2017.01.047.Microstructure tailoring of selenium-core multimaterial optoelectronic fibers
Optical Materials Express. 2017. DOI : 10.1364/OME.7.001388.Variant selection in surface martensite
Journal of Applied Crystallography. 2017. DOI : 10.1107/S160057671701398X.Evolution of grain boundary network topology in 316L austenitic stainless steel during powder hot isostatic pressing
Acta Materialia. 2017. DOI : 10.1016/j.actamat.2017.04.068.Cubic zirconia in >2370◦C impact melt records Earth’s hottest crust
Earth and Planetary Science Letters. 2017. DOI : 10.1016/j.epsl.2017.08.012.Angular distortive matrices of phase transitions in the fcc-bcc-hcp system
Acta Materialia. 2016. DOI : 10.1016/j.actamat.2016.01.075.Creep and stress relaxation of a FeMnSi-based shape memory alloy at low temperatures
Materials Science And Engineering A-Structural Materials Properties Microstructure And Processing. 2016. DOI : 10.1016/j.msea.2016.09.042.Continuous atomic displacements and lattice distortion during fcc–bcc martensitic transformation
Acta Materialia. 2015. DOI : 10.1016/j.actamat.2015.06.010.Comment on 'A new nanoscale metastable iron phase in carbon steels'
arXiv. 2015.EBSD imaging of orientation relationships and variant groupings in different martensitic alloys and Widmanstätten iron meteorites
Materials Characterization. 2014. DOI : 10.1016/j.matchar.2014.05.015.Local band bending and grain-to-grain interaction induced strain nonuniformity in polycrystalline CdTe films
Physical Review B. 2014. DOI : 10.1103/PhysRevB.89.035310.Chalcopyrite thin-film solar cells by industry-compatible ink-based process
Solar Energy Materials and Solar Cells. 2013. DOI : 10.1016/j.solmat.2013.03.029.Relationships between mechanical behavior and microstructural evolutions in Fe 9Cr-ODS during the fabrication route of SFR cladding tubes
Journal of Nuclear Materials. 2013. DOI : 10.1016/j.jnucmat.2013.04.052.Metastable precipitation in 6XXX Al alloys as revealed by STEM-ADF at the atomic level
Revue de Metallurgie. Cahiers D'Informations Techniques. 2013. DOI : 10.1051/metal/2012018.The effect of processing parameters on the dynamic recrystallisation behaviour of API-X70 pipeline steel
Materials Science and Engineering A. 2013. DOI : 10.1016/j.msea.2013.01.066.Excimer laser crystallization of amorphous silicon on metallic substrate
Applied Physics A: Materials Science and Processing. 2013. DOI : 10.1007/s00339-013-7643-1.Incidence of mechanical alloying contamination on oxides and carbides formation in ODS ferritic steels
Journal of Nuclear Materials. 2013. DOI : 10.1016/j.jnucmat.2013.03.090.Crystallographic Analysis of Isothermally Transformed Bainite in 0.2C-2.0Mn-1.5Si-0.6Cr Steel Using EBSD
Journal of Materials Science and Technology. 2013. DOI : 10.1016/j.jmst.2013.01.015.One-step model of the face-centred-cubic to body-centred-cubic martensitic transformation
Acta Crystallographica Section A: Foundations of Crystallography. 2013. DOI : 10.1107/S0108767313019016.Multiscale phase mapping of LiFePO4-based electrodes by transmission electron microscopy and electron forward scattering diffraction
ACS Nano. 2013. DOI : 10.1021/nn4043964.Aluminum catalyzed growth of silicon nanowires: Al atom location and the influence of silicon precursor pressure on the morphology
Journal of Crystal Growth. 2012. DOI : 10.1016/j.jcrysgro.2011.12.057.Assessment of a new fabrication route for Fe-9Cr-1W ODS cladding tubes
Journal of Nuclear Materials. 2012. DOI : 10.1016/j.jnucmat.2011.12.013.Improved multicrystalline silicon ingot crystal quality through seed growth for high efficiency solar cells
Progress in Photovoltaics: Research and Applications. 2012. DOI : 10.1002/pip.1221.Evidence of anti-coking behavior of La 0.8Sr 0.2Cr 0.98Ru 0.02O 3 as potential anode material for Solid Oxide Fuel Cells directly fed under methane
Journal of Catalysis. 2012. DOI : 10.1016/j.jcat.2012.03.012.CW laser induced crystallization of thin amorphous silicon films deposited by EBE and PECVD
Applied Surface Science. 2012. DOI : 10.1016/j.apsusc.2012.04.023.Hidden defects in silicon nanowires
Nanotechnology. 2012. DOI : 10.1088/0957-4484/23/2/025701.Embedded layer of Ag nanoparticles prepared by a combined PECVD/PVD process producing SiO xC y-Ag nanocomposite thin films
Nanotechnology. 2012. DOI : 10.1088/0957-4484/23/1/015603.Microcracking of high zirconia refractories after t→m phase transition during cooling: An EBSD study
Journal of the European Ceramic Society. 2011. DOI : 10.1016/j.jeurceramsoc.2011.02.033.Crystallographic analysis of martensite in 0.2C-2.0Mn-1.5Si-0.6Cr steel by EBSD
Metallurgia Italiana. 2011.Al catalyzed growth of silicon nanowires and subsequent in situ dry etching of the catalyst for photovoltaic application
Physica Status Solidi (A) Applications and Materials Science. 2011. DOI : 10.1002/pssa.201127072.Combined effect of stress and strain on crystallographic orientation of bainite
Ironmaking and Steelmaking. 2011. DOI : 10.1179/1743281211Y.0000000012.Quantification of multiple twinning in face centred cubic materials
Acta Materialia. 2011. DOI : 10.1016/j.actamat.2010.09.029.Confirmation of the domino-cascade model by lifepo4/fepo 4 precession electron diffraction
Chemistry of Materials. 2011. DOI : 10.1021/cm201783z.Crystallographic analysis of martensite in 0.2C-2.0Mn-1.5Si-0.6Cr steel using EBSD
Journal of Materials Science and Technology. 2011. DOI : 10.1016/S1005-0302(11)60165-5.Reply to "comments on 'The mechanisms of the fcc-bcc martensitic transformation revealed by pole figures'"
Scripta Materialia. 2011. DOI : 10.1016/j.scriptamat.2010.09.004.New theory of fcc-bcc martensitic transformations in steels
Revue de Metallurgie. Cahiers D'Informations Techniques. 2011. DOI : 10.1051/metal/2011005.Inhomogeneous nucleation and growth of palladium and alloyed cobalt during self-aligned capping of advanced copper interconnects
Thin Solid Films. 2010. DOI : 10.1016/j.tsf.2010.01.025.Reconstruction of the cubic and tetragonal oarent grains from electron backscatter diffraction maps of monoclinic zirconia
Journal of the American Ceramic Society. 2010. DOI : 10.1111/j.1551-2916.2010.03894.x.Identification of new phases in annealed Fe-18CrWTi ODS powders
Journal of Nuclear Materials. 2010. DOI : 10.1016/j.jnucmat.2010.01.023.The mechanisms of the fcc-bcc martensitic transformation revealed by pole figures
Acta Materialia. 2010. DOI : 10.1016/j.actamat.2009.10.046.Odd electron diffraction patterns in silicon nanowires and silicon thin films explained by microtwins and nanotwins
Journal of Applied Crystallography. 2009. DOI : 10.1107/S0021889808042131.Crystallographic reconstruction methods to study phase transformations by EBSD
Microscopy and Microanalysis. 2009. DOI : 10.1017/S1431927609092617.Importance of the α → β transformation in the variant selection mechanisms of thermomechanically processed titanium alloys
Scripta Materialia. 2008. DOI : 10.1016/j.scriptamat.2008.05.013.Growth of one-dimensional Si/SiGe heterostructures by thermal CVD
Nanotechnology. 2008. DOI : 10.1088/0957-4484/19/33/335603.Growth parameters and shape specific synthesis of silicon nanowires by the VLS method
Journal of Nanoparticle Research. 2008. DOI : 10.1007/s11051-007-9350-3.Catalytic steam reforming of methane over La0.8Sr0.2CrO3 based Ru catalysts
Catalysis Today. 2007. DOI : 10.1016/j.cattod.2007.06.071.Examination of Be//Cu joints in hipped Be tiles by using Ion Beam Analysis methods
Fusion Engineering and Design. 2007. DOI : 10.1016/j.fusengdes.2007.03.031.GenOVa: A computer program to generate orientational variants
Journal of Applied Crystallography. 2007. DOI : 10.1107/S0021889807048741.Multiple twinning in cubic crystals: Geometric/algebraic study and its application for the identification of the Σ3n grain boundaries
Acta Crystallographica Section A: Foundations of Crystallography. 2007. DOI : 10.1107/S0108767306044291.ARPGE: A computer program to automatically reconstruct the parent grains from electron backscatter diffraction data
Journal of Applied Crystallography. 2007. DOI : 10.1107/S0021889807048777.Alloying effects on microstructure and mechanical properties of high volume fraction SiC-particle reinforced Al-MMCs made by squeeze casting infiltration
Composites Science and Technology. 2007. DOI : 10.1016/j.compscitech.2006.04.005.Groupoid of orientational variants
Acta Crystallographica Section A: Foundations of Crystallography. 2006. DOI : 10.1107/S010876730503686X.Multilayered and nanolayered hard nitride thin films deposited by cathodic arc evaporation. Part 1: Deposition, morphology and microstructure
Surface and Coatings Technology. 2006. DOI : 10.1016/j.surfcoat.2005.11.102.Reconstruction of parent grains from EBSD data
Materials Characterization. 2006. DOI : 10.1016/j.matchar.2006.03.008.Present development status of EUROFER and ODS-EUROFER for application in blanket concepts
Fusion Engineering and Design. 2005. DOI : 10.1016/j.fusengdes.2005.06.186.Damage mechanisms at a microscopic scale of PM Ti-6Al-4V at 20 K
Journal of Materials Science and Technology. 2004.Microstructural evolution of Y2O3 and MgAl 2O4 ODS EUROFER steels during their elaboration by mechanical milling and hot isostatic pressing
Journal of Nuclear Materials. 2004. DOI : 10.1016/j.jnucmat.2004.06.010.Matrix chemistry optimisation of Al/Altex composites preserving both fibres and matrix alloy integrity
Materials Science and Technology. 2002. DOI : 10.1179/026708302225002074.TEM study of interfacial reactions and precipitation mechanisms in Al2O3 short fiber or high volume fraction SiC particle reinforced Al-4Cu-1Mg-0.5Ag squeeze-cast composites
EMPA Activities. 2001.TEM study of interfacial reactions and precipitation mechanisms in Al2O3 short fibers or SiC particles reinforced Al-4Cu-1Mg-0.5Ag squeeze-cast composites
Lausanne, EPFL, 2000. DOI : 10.5075/epfl-thesis-2246.Transmission electron microscopy study of the β′ phase (Al-Mg-Si alloys) and QC phase (Al-Cu-Mg-Si alloys): ordering mechanism and crystallographic structure
Acta mater.. 2000. DOI : 10.1016/S1359-6454(00)00057-4.Microstructure and mechanical properties of a high volume fraction SiC particle reinforced AlCu4MgAg squeeze casting
Materials Science and Engineering A. 1999. DOI : 10.1016/S0921-5093(99)00163-X.About the epitaxial growth of Mg-subgrains on Al2MgC2 interfacial carbides in a squeeze cast Mg-4Al/T300 metal matrix composite
Journal of Materials Science Letters. 1999. DOI : 10.1023/A:1006669514604.Structural phase transition in Al-Cu-Mg-Si alloys by transmission electron microscopy study on an Al-4wt% Cu-1 wt% alloy reinforced by SiC particles
Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties. 1999. DOI : 10.1080/014186199251364.Effect of SiO2 binder on the precipitation state of an AlCu4Mg1Ag/Saffil composite
Journal of Materials Science. 1999. DOI : 10.1023/A:1004502819390.Teaching & PhD
Teaching
Materials Science and Engineering
PhD Students
Guidoux Céline, Moosavi Seyyedezzatollah, Xiao Junfeng, Zamani Aliabadi Mohammadreza,Past EPFL PhD Students
Baur Annick Pauline , Larcher Margaux Nathalie Dominique ,https://www.researchgate.net/publication/314502850_Crystallography_of_Structural_Phase_Transformations_Part_A https://www.researchgate.net/publication/314503029_Crystallography_of_Structural_Phase_Transformations_Part_B https://www.researchgate.net/publication/314503054_Crystallography_of_Structural_Phase_Transformations_Part_C https://www.researchgate.net/publication/314503251_Crystallography_of_Structural_Phase_Transformations_Part_D_EBSD_and_TEM
Courses
Phase transformations
This course is an introduction to the thermodynamics and crystallography liquid-solid and solid-solid phase transformations. It is essentially focused on metallic materials, but will occasionally make extensions to ceramics and rocks.
Crystallography of structural phase transformations
The microstructure of many alloys and ceramics are constituted of very fine intricate domains (variants) created by diffusive or displacive phase transformations. The course introduces the crystallographic tools required to define, calculate and predict the different configurations of variants.