File(s) under permanent embargo
Recrystallization in AISI 304 austenitic stainless steel during and after hot deformation
journal contribution
posted on 2008-05-25, 00:00 authored by A Dehghan-Manshadi, Matthew BarnettMatthew Barnett, Peter HodgsonPeter HodgsonIn order to improve the understanding of the dynamic and post-dynamic recrystallization behaviours of AISI 304 austenitic stainless steel, a series of hot torsion test have been performed under a range of deformation conditions. The mechanical and microstructural features of dynamic recrystallization (DRX) were characterized to compare and contrast them with those of the post-dynamic recrystallization. A necklace type of dynamically recrystallized microstructure was observed during hot deformation at 900 °C and at a strain rate of 0.01 s−1. Following deformation, the dependency of time for 50% recrystallization, t50, changed from “strain dependent” to “strain independent” at a transition strain (ε*), which is significantly beyond the peak. This transition strain was clearly linked to the strain for 50% dynamic recrystallization during deformation. The interrelations between the fraction of dynamically recrystallized microstructure, the evolution of post-dynamically recrystallized microstructure and the final grain size have been established. The results also showed an important role of grain growth on softening of deformed austenite.
History
Journal
Materials science and engineering A: structural materials: properties, microstructures and processingVolume
485Issue
1-2Pagination
664 - 672Publisher
Elsevier SALocation
Lausanne, SwitzerlandPublisher DOI
ISSN
0921-5093eISSN
1873-4936Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2007, Elsevier B.V.Usage metrics
Keywords
stainless steelhot deformationdynamic recrystallizationpost-dynamic recrystallizationEBSDScience & TechnologyTechnologyNanoscience & NanotechnologyMaterials Science, MultidisciplinaryMetallurgy & Metallurgical EngineeringScience & Technology - Other TopicsMaterials ScienceMETADYNAMIC RECRYSTALLIZATIONWARM DEFORMATIONALLOY 800HWORKING304-STAINLESS-STEELNUCLEATIONMECHANISMSBEHAVIORTRANSITIONMechanical Engineering
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC