About this Abstract

Meeting

2020 TMS Annual Meeting & Exhibition

Symposium

Use of Large Scale Facilities to Understand the Physical Metallurgy of Fe-based Alloys

Presentation Title

Carbide-free Bainite Transformations in Non-isothermal Conditions Investigated by In-situ High-energy X-ray Diffraction Experiments

Author(s)

Cecile Rampelberg, Guillaume Geandier, Julien Teixeira, Thomas Sourmail, Sébastien Allain

On-Site Speaker (Planned)

Cecile Rampelberg

Abstract Scope

Carbide-Free Bainite (CFB) transformation has been investigated in situ on three industrial grades by High Energy X-Ray Diffraction. These experiments has been realized on P07 beamline in PETRA III at DESY (Hamburg) with a monochromatic beam (100keV). High flux from synchrotron source and high-throughput 2D detector (Perkin-Elmer) allows the collection of Debye-Scherrer diffraction patterns at high rate (10 Hz). Three bainitizing thermal schedules have been studied : conventionnel isothermal holdings, continuous cooling (close to industrial condition after forging) and multi-step cooling sequences (successive isothermal steps with decreasing temperatures to approximate a continuous cooling and decompose transformation sequences). Coupled with direct post mortem microstructural observations and mechanical tests, these analysis provide a better understanding of phase transformation mechanisms and kinetics during CFB formation.

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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