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Grain size effect on the warm deformation behaviour of a Ti-IF steel
journal contribution
posted on 2004-01-01, 00:00 authored by A Oudin, Matthew BarnettMatthew Barnett, Peter HodgsonPeter HodgsonThe effect of grain size on the warm deformation behaviour of a titanium stabilized interstitial free (IF) steel was investigated using hot torsion. The initial work hardening regime is followed by the development of a broad stress peak after which work softening occurs. The hypothetical saturation stress (Estrin–Mecking model) and the stress at final strain were relatively insensitive to grain size. However, the strain to the peak stress was strongly dependent on the grain size at low values of the Zener–Hollomon parameter. A simple phenomenological approach, using a combined Estrin–Mecking model and an Avrami type equation, was used to model the flow curves. The hypothetical saturation stress, the stress at final strain and the strain to peak stress were modelled using three different hyperbolic sine laws. A comparison with independent data from the literature shows that the apparent activation energy of deformation determined in this work (Q=372 kJ/mol) can be used to rationalize the steady-state stress in compression data found in the literature.
History
Journal
Materials science & engineering A. Structural materials : properties, microstructure and processingVolume
367Issue
1-2Pagination
282 - 294Publisher
Elsevier B.V.Location
Amsterdam, NetherlandsISSN
0921-5093eISSN
1873-4936Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2003, ElsevierUsage metrics
Keywords
IF steelferrite deformationwarm deformationflow curvetorsion testScience & TechnologyTechnologyNanoscience & NanotechnologyMaterials Science, MultidisciplinaryMetallurgy & Metallurgical EngineeringScience & Technology - Other TopicsMaterials ScienceINTERSTITIAL-FREE STEELSDYNAMIC RECRYSTALLIZATIONHOT DEFORMATIONALPHA-IRONSTATIC RECRYSTALLIZATIONELEVATED-TEMPERATURESTAINLESS-STEELFERRITESTRAINWORKINGMechanical Engineering
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