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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Use of Large Scale Facilities to Understand the Physical Metallurgy of Fe-based Alloys
Presentation Title Stress Tensor Determination during Phase Transformation of a Metal Matrix Composite using In situ High Energy X-ray Diffraction
Author(s) Guillaume Geandier, Lilian Vautrot, Benoît Denand, Sabine Denis
On-Site Speaker (Planned) Guillaume Geandier
Abstract Scope In situ high energy X-ray diffraction using a synchrotron source performed on a steel metal matrix composite reinforced by TiC allows following the evolutions during cooling of the phase fractions and the mean cell parameters (Rietveld analysis). Using a radiation furnace with a controlled rotation of the specimen, the evolutions during cooling of the components of the stress tensor in the composite can be obtained. Thus, it has been shown that the matrix and the reinforcements are under a hydrostatic stress state all along cooling even during the phase transformation. Using the stress free cell parameters and their evolutions with temperature, it comes out that from 900°C to the martensitic transformation, the compressive stresses increase in the reinforcements and small compressive stresses exist in the austenite. As the transformation occurs the stresses relax largely in the reinforcements, the compressive stresses increase in the austenite and the martensite undergoes tensile stresses.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Carbide-free Bainite Transformations in Non-isothermal Conditions Investigated by In-situ High-energy X-ray Diffraction Experiments
Carbon Heterogeneities in Austenite during Quenching & Partitioning (Q&P) Process Revealed by In Situ High Energy X-ray Diffraction (HEXRD) Experiments
HEXRD and SAXS to Unveil the Dynamics of Phase Transformation in Steels: From Carbide-free Bainite To Mapping of Compositionally Graded Samples
In-situ Synchrotron X-ray Diffraction Stress Analysis during Laser Surface Line Hardening of Samples with Specific Geometric Features
In situ HEXRD Determination and Numerical Simulation of Internal Stresses during HeatTtreatment of Carburized and Carbonitrided Low-alloyed Steels
In situ Quantitative Study of Retained Austenite Mechanical Stability in 3rd Generation TRIP-aided Steels by High-Energy X-ray Diffraction on Synchrotron Beamline
Microstructure Evolution and Phase Transformations during Deformation of Metastable Austenitic CrMnNi Steel as Revealed by In situ Synchrotron Radiation X-ray Diffraction
Nucleation and Evolution of Sigma Phase and Nitrides during Heat Treatment and Welding of Duplex Stainless Steels
Precipitation Kinetics and Chemistry Evolution of Oxide Dispersion Strengthened Steels throughout their Consolidation Process Evaluated by In-situ Anomalous Small-angle X-ray Scattering
Real-time Investigation of Recovery, Recrystallization and Austenite Transformation during Annealing of a Cold-rolled Steel Using High Energy X-ray Diffraction (HEXRD)
Stress Tensor Determination during Phase Transformation of a Metal Matrix Composite using In situ High Energy X-ray Diffraction

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