Assessment of EBSD Analysis and Reconstruction Methods as a Tool for the Determination of Recrystallized Fractions in Hot-Deformed Austenitic Microstructures

Assessment of EBSD Analysis and Reconstruction Methods as a Tool for the Determination of... The microstructural evolution of hot-deformed austenite during recrystallization was studied in a non-microalloyed low carbon steel and a low carbon steel, microalloyed with niobium and titanium. Double-hit compression tests were carried out to evaluate the isothermal recrystallization behavior. Specific deformation temperatures and interpass times were combined to produce characteristic recrystallization states by quenching the samples to a martensitic microstructure. The reconstruction software Merengue 2 was used to determine the prior austenite microstructure and evaluate the recrystallized fraction in the microstructure. The reconstruction is based on EBSD measurements of the martensitic microstructure. The determination of the recrystallized fraction was realized by evaluating the grain orientation spread. This work compares the results of both methods and estimates their uncertainties. It shows the potential of EBSD reconstruction methods to characterize different recrystallization states of low carbon steels out of EBSD data. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Metallurgical and Materials Transactions A Springer Journals

Assessment of EBSD Analysis and Reconstruction Methods as a Tool for the Determination of Recrystallized Fractions in Hot-Deformed Austenitic Microstructures

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Publisher
Springer US
Copyright
Copyright © 2018 by The Minerals, Metals & Materials Society and ASM International
Subject
Materials Science; Metallic Materials; Characterization and Evaluation of Materials; Structural Materials; Surfaces and Interfaces, Thin Films; Nanotechnology
ISSN
1073-5623
eISSN
1543-1940
D.O.I.
10.1007/s11661-018-4593-4
Publisher site
See Article on Publisher Site

Abstract

The microstructural evolution of hot-deformed austenite during recrystallization was studied in a non-microalloyed low carbon steel and a low carbon steel, microalloyed with niobium and titanium. Double-hit compression tests were carried out to evaluate the isothermal recrystallization behavior. Specific deformation temperatures and interpass times were combined to produce characteristic recrystallization states by quenching the samples to a martensitic microstructure. The reconstruction software Merengue 2 was used to determine the prior austenite microstructure and evaluate the recrystallized fraction in the microstructure. The reconstruction is based on EBSD measurements of the martensitic microstructure. The determination of the recrystallized fraction was realized by evaluating the grain orientation spread. This work compares the results of both methods and estimates their uncertainties. It shows the potential of EBSD reconstruction methods to characterize different recrystallization states of low carbon steels out of EBSD data.

Journal

Metallurgical and Materials Transactions ASpringer Journals

Published: Apr 16, 2018

References

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