Sylvain Depinoy

Biography

Sylvain Depinoy is a researcher specializing in the study of metallic materials, with particular expertise in additive manufacturing processes and their impact on microstructural and mechanical properties. His work focuses in particular on analyzing the relationships between microstructure and mechanical behavior, especially for alloys such as stainless steels (316L) and nickel-based superalloys. He explores the effects of heat treatments, solidification conditions, and segregation phenomena on fracture strength, toughness, and microstructural stability at various temperatures. His research incorporates advanced experimental approaches, such as in situ X-ray diffraction and electron microscopy, as well as numerical modeling to understand the mechanisms of deformation and phase transformation. His work contributes to optimizing material performance for demanding applications, particularly in the energy and aerospace sectors.

Publication(s)

2026
Towards deeper carburizing by DEDp and L-PBF additive manufacturing of in-situ TiC-reinforced steel composites: powders and processability DOI : 10.1016/j.matdes.2026.116439
2025
Impact toughness at room and cryogenic temperatures of 316L stainless steel processed by wire arc additive manufacturing DOI : 10.1016/j.msea.2025.148276
2025
In situ and ex situ characterization of microstructure evolution of a γ-γ’ coating on CMSX-4 Plus superalloy during thermal cycling: Insights into Pt diffusion and phase transformations DOI : 10.1016/j.jallcom.2024.177871
2025
Effect of microstructure on creep mechanical behavior and damage mechanisms of AISI 316L (N) austenitic stainless steels DOI : 10.1016/j.prostr.2025.06.057
2025
Influence of steel substrate behavior on the deformation and cracking of Zn–Al–Mg coatings on galvanized steel sheets DOI : 10.5802/crmeca.340
2024
Impact toughness of LPBF 316L stainless steel below room temperature DOI : 10.1016/j.msea.2024.147189
2023
Correction to: Austenite Grain Growth in a 2.25Cr-1Mo Vanadium-Free Steel Accounting for Zener Pinning and Solute Drag: Experimental Study and Modeling (Metallurgical and Materials Transactions A, (2017), 48, 5, (2289-2300), 10.1007/s11661-017-4002-4) DOI : 10.1007/s11661-023-07209-3
2023
Microstructure – Toughness relationships in 316L stainless steel produced by laser powder bed fusion DOI : 10.1016/j.msea.2023.145179
2023
Anisotropy in cyclic behavior and fatigue crack growth of IN718 processed by laser powder bed fusion DOI : 10.1016/j.addma.2022.103301
2022
Influence of solidification conditions on chemical heterogeneities and dislocations patterning in additively manufactured 316L stainless steel DOI : 10.1016/j.mtla.2022.101472
2022
Dependency of recrystallization kinetics on the solidification microstructure of 316L stainless steel processed by laser powder bed fusion (LPBF) DOI : 10.1016/j.matchar.2022.112370
2022
Microstructure control of Additively manufactured IN718 By L-PBF process DOI : 10.1080/00325899.2022.2069540
2021
Microstructure Control Of Additively Manufactured IN718 By L-PBF Process
2021
Experimental determination of solute redistribution behavior during solidification of additively manufactured 316L DOI : 10.1016/j.scriptamat.2020.113663
2020
Computational Kinetics: Application to Nuclear Materials DOI : 10.1016/B978-0-12-803581-8.11600-5
2019
In Situ Quantitative Assessment of the Role of Silicon During the Quenching and Partitioning of a 0.2C Steel DOI : 10.1007/s11661-019-05281-2
2019
Interface toughening in multilayered systems through compliant dissipative interlayers DOI : 10.1016/j.jmps.2019.05.013
2019
On the mode I toughness of adhesive bonds exhibiting strain-softening and re-hardening DOI : 10.1016/j.ijsolstr.2018.11.026
2019
Into the quenching and; partitioning of a 0.2C steel: An in-situ synchrotron study DOI : 10.1016/j.msea.2018.11.065
2018
Irradiation-based design of mechanically resistant microstructures tuned via multiscale phase-field modeling DOI : 10.1038/s41598-018-28685-3
2018
On the effect of Q&P processing on the stretch-flange-formability of 0.2C ultra-high strength steel sheets DOI : 10.2355/isijinternational.ISIJINT-2018-121
2017
Austenite Grain Growth in a 2.25Cr-1Mo Vanadium-Free Steel Accounting for Zener Pinning and Solute Drag: Experimental Study and Modeling DOI : 10.1007/s11661-017-4002-4
2017
Carbide Precipitation in 2.25 Cr-1 Mo Bainitic Steel: Effect of Heating and Isothermal Tempering Conditions DOI : 10.1007/s11661-017-4045-6
2016
Effect of heat treatment on the temperature dependence of the fracture behavior of X-750 alloy DOI : 10.1016/j.msea.2016.09.081
2015
Evolution of microstructure during tempering and its influence on the mechanical behavior of 2.25Cr-1Mo bainitic steel

Teaching

Materials for Engineers

2021 – en cours Lecturer

The in-person component (27 hours) is structured into plenary sessions in a lecture hall (12 hours), small-group sessions (12 hours) with smaller class sizes, and presentations of lab reports to a panel (30 minutes). It also includes a written exam (2 hours and 30 minutes). Students’ independent study (18 hours) includes (in addition to the engine disassembly and reassembly mentioned above): A self-assessment multiple-choice quiz (30 min) on prerequisites. This self-assessment is conducted prior to the first class to identify students’ strengths and weaknesses and then focus on certain aspects during face-to-face instruction. An assignment on phase diagrams (2 hours) An assignment on material aging (2 hours) Practical lab work at the CMAT (6 hours): 13 lab sessions are conducted in groups of 4 to 5 students, supervised by the Center’s engineers and technicians as well as doctoral students, since most lab topics are related to current thesis projects. A 20-minute oral presentation for each lab session is held at the end of the day in two parallel sessions. Students therefore complete one of the lab sessions and participate in or attend half of the presentations at the end of the day. Two similar days are organized to accommodate the entire class. Final exam review (5 hours)

Physical Metallurgy

2025 – en cours Course Director

Lectures, Tutorials, Numerical Simulation, Case Studies

Metal 3D Printing

2021 – en cours Course Director

The curriculum for the course days is as follows: General introduction to additive manufacturing processes; overview of the phenomena involved in LBM and ColdSpray processes; thermodynamics; phase transformation during rapid solidification; associated microstructural evolution; mechanical behavior and properties of parts produced by additive manufacturing processes; post-processing; defect mitigation. LBM and ColdSpray fabrication techniques, construction steps, overview of experimental characterization methodologies related to additive manufacturing processes and defect analysis, measurement of residual stresses using X-ray diffraction (XRD). Numerical modeling of additive manufacturing processes; objectives of simulation tool development; physical phenomena monitored; resolution scales; prediction of final properties. Presentation (by an industry R&D engineer) on the use of additive manufacturing processes in an industrial context, the objectives pursued, and the expected results. In addition to these lectures, a project component will also be included in the course, lasting 6 hours, at the Materials Center (CMAT, Evry), requiring students to travel to this laboratory for two full days. During these two days, on the first morning, students will attend the lecture on fabrication and characterization techniques associated with additive processes (Session V—3 hours in the morning on Day 1). The subsequent training period (3 hours in the afternoon on Day 1 + 3 hours in the morning on Day 2) will be dedicated to carrying out the supervised projects. Independent work (3 hours in the afternoon on Day 2) may be conducted at the CMAT to allow for the review and analysis of the results, in preparation for the evaluation session. Project selections will be made no later than during the first lecture session.

Materials for New Challenges (Research Quarter)

2020 – en cours Course Director

PhD supervision

2024 Stress corrosion cracking in the primary coolant environment of a pressurized water reactor of a stainless steel produced by powder metallurgy and hot isostatic pressing MOLIERE Jane
2023 The effect of different processing routes for stainless steel on its high-temperature resistance and for very long service durations BEN BETTAIEB Marwa
2022 The development of the L-PBF process with preheating for the fabrication of unweldable nickel-based superalloys. ASSAINTE Matthieu
2021 Effect of quenching, tempering, and chemical segregations on the microstructure and impact toughness of 18MND5 steel for large forged components. WEISBECKER Romain
2021 Microstructure and properties of 316L steel produced by wire-based additive manufacturing (WAAM & WLAM): experimental characterization and modeling ARTIERES Damien
2021 Hot and cold cracking mechanisms in nickel-based superalloys produced by laser powder bed fusion (L-PBF): effect of process-induced microstructure BORGES MENDONCA Elisa
2021 The evolution of the microstructure of a coated Ni-based single-crystal superalloy γ-γ' system under thermomechanical fatigue conditions RADI Niama
2020 Microstructural evolution of 316L steel produced by additive manufacturing (LPBF and WAAM) and its influence on fracture behavior DE SONIS Edouard

Keywords

Awards & distinctions

Team