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Erschienen in: The International Journal of Advanced Manufacturing Technology 5-6/2022

04.07.2022 | ORIGINAL ARTICLE

Metal flow behaviour and processing maps of high heat resistant steel during hot compression

verfasst von: Japheth Obiko, Lesley Chown, David Whitefield, Micheal Bodunrin

Erschienen in: The International Journal of Advanced Manufacturing Technology | Ausgabe 5-6/2022

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Abstract

This article reports the flow stress behaviour of ASTM A335 P92 steel. Uniaxial isothermal compression experiments were conducted to examine the hot deformation behaviour of P92 steel in a Gleeble® 3500 thermal–mechanical simulator. The test conditions were 0.01–10 s−1 strain rate and 850–1000 ℃ deformation temperature. Constitutive equations and processing maps developed were used to describe the hot deformation process. The results showed that the flow stress–strain curves exhibited a dynamic recovery (DRV) behaviour as the dominant softening mechanism. The flow stress decreased with an increase in the deformation temperature or a decrease in strain rate. Using the Arrhenius equation, the stress exponent and the activation energy values were 8.0 kJ.mol−1 and 487.56 kJ.mol−1, respectively. The correlation between the constructed processing maps and microstructure showed that the optimal process parameters occurred at a lower strain rate in the region of 0.1 s−1 and deformation temperatures of 900–950 ℃ and 1000 ℃ for the steel investigated.

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Metadaten
Titel
Metal flow behaviour and processing maps of high heat resistant steel during hot compression
verfasst von
Japheth Obiko
Lesley Chown
David Whitefield
Micheal Bodunrin
Publikationsdatum
04.07.2022
Verlag
Springer London
Erschienen in
The International Journal of Advanced Manufacturing Technology / Ausgabe 5-6/2022
Print ISSN: 0268-3768
Elektronische ISSN: 1433-3015
DOI
https://doi.org/10.1007/s00170-022-09577-3

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