Cyril Cayron

Cyril Cayron is a Scientific Collaborator at the Laboratory of Thermomechanical Metallurgy (LMTM) at École Polytechnique Fédérale de Lausanne (EPFL) in Neuchâtel, Switzerland, where he has worked since 2014. He also serves as a Lecturer in the School of Engineering at EPFL, teaching courses on phase transformations. His work focuses on the intersection of metallurgy, crystallography, and phase transformations, with applications across multiple industries including nuclear energy, aeronautics, and microelectronics.

• PhD in electron microscopy study of aluminum matrix composites (1996-2000), EPFL, Lausanne
• Habilitation à Diriger des Recherches (HDR) (2012)
• École Nationale Supérieure des Mines de Nancy, France (1992-1995)

Cyril Cayron's research spans both fundamental and applied aspects of materials science. His primary focus is on phase transformations in metallic materials, where he has developed the groupoid theory of crystallographic variants. His work on martensitic transformations in steels has led to a new hard-sphere crystallographic model that serves as an alternative to traditional phenomenological theories. He has also developed the ARPGE software for reconstructing parent grains from EBSD data, which is distributed in more than 20 countries.

His recent publications reveal a strong focus on advanced manufacturing techniques, particularly additive manufacturing (3D printing), where he investigates microstructure evolution, phase transformations, and mechanical properties in materials like stainless steel, titanium alloys, and high-entropy alloys. His work bridges fundamental crystallography with practical applications in aerospace, energy, and medical devices (particularly shape memory alloys).

• 2018: Haenny Prize - For the connection between crystallography and phase transformations

Cyril Cayron co-supervises multiple PhD students including Annick Baur, Margaux Larcher, and Céline Guidoux. He serves as a reviewer for prestigious journals including Acta Materialia, Scripta Materialia, and Journal of Applied Crystallography. His research has been supported by various institutions including CEA/LITEN in Grenoble and EPFL.

At EPFL's Laboratory of Thermomechanical Metallurgy, Cayron manages the metallography laboratory and is responsible for SEM, EDS, EBSD, TEM, and HRTEM characterizations. His team investigates the relationships between strong deformations, textures, grain sizes, and phase transformations in various metallic systems.