Hot deformation behavior of an industrially cast large grained low density austenitic steel

Hot deformation behavior of an industrially cast large grained low density austenitic steel

Hot compression testing was performed on specimens of an Fe–30Mn–9Al–1Si-0.9C-0.5Mo wt.% low density steel which were extracted from an industrial casting with large grain size (320 ± 50 μm). Grain boundaries act as nucleation sites for dynamic recrystallization in the present material and the large...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 825; no. 141785; p. 141785
Main Authors: Pierce, D.T., Field, D.M., Limmer, K.R., Muth, T., Sebeck, K.M.
Format: Journal Article
Language:English
Published: Lausanne Elsevier B.V 21-09-2021
Elsevier BV
Elsevier
Subjects:
Activation energy
Austenitic stainless steels
Compression tests
Dynamic recrystallization
Grain boundaries
Grain size
Hot deformation
Hot pressing
Low density materials
Low density steel
MATERIALS SCIENCE
Nucleation
Rolling
Work hardening
Yield strength
Zener-holloman analysis
Hot deformation
Rolling
Zener-holloman analysis
Low density steel
Activation energy
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Summary:Hot compression testing was performed on specimens of an Fe–30Mn–9Al–1Si-0.9C-0.5Mo wt.% low density steel which were extracted from an industrial casting with large grain size (320 ± 50 μm). Grain boundaries act as nucleation sites for dynamic recrystallization in the present material and the large grain size results in fewer nucleation sites, which delays dynamic recrystallization to larger strains and/or higher temperatures and causes higher rates of work hardening relative to similar materials but with smaller grain sizes. A relatively high activation energy for hot deformation of 470 ± 90 kJ mol−1 was determined from a Zener-Hollomon analysis of the flow stresses at different temperatures and strain rates, attributed in part to the large grain size.
Bibliography:USDOE
AC05-00OR22725
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2021.141785