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Effect of initial grain size on dynamic recrystallization in high purity austenitic stainless steels

El Wahabi, M. ; Gavard, L. ; Montheillet, F. ; Cabrera, J.M. ; Prado, J.M.

Acta materialia, 2005-10, Vol.53 (17), p.4605-4612 [Periódico revisado por pares]

Oxford: Elsevier Ltd

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Título:
Effect of initial grain size on dynamic recrystallization in high purity austenitic stainless steels
Autor: El Wahabi, M. ; Gavard, L. ; Montheillet, F. ; Cabrera, J.M. ; Prado, J.M.
Assuntos: Applied sciences ; Austenitic stainless steels ; Avrami exponent ; Discontinuous dynamic recrystallization ; Dynamic recrystallization ; EBSD ; Engineering Sciences ; Exact sciences and technology ; Grain size ; Materials ; Metals. Metallurgy ; Microstructure ; Purity ; Softening ; Stainless steels ; Stress strain curves ; Stress-strain relationships ; Twin boundary fraction
É parte de: Acta materialia, 2005-10, Vol.53 (17), p.4605-4612
Notas: ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
Descrição: The influence of initial microstructure on discontinuous dynamic recrystallization (DDRX) has been investigated by using high purity and ultra high purity austenitic stainless steels with various initial grain sizes. After uniaxial compression tests at constant strain rates and various temperatures, the steady state microstructure or the state corresponding to the maximum strain (ε=1) attained in the test was analyzed by scanning electron microscopy aided with automated electron back scattering diffraction. Recrystallized grain size drec and twin boundary fraction fTB measurements were carried out. The mechanical behavior was also investigated by comparing experimental stress–strain curves with various initial grain sizes. DDRX kinetics was described by the classical Avrami equation. It was concluded that larger initial grain sizes promoted a delay in the DDRX onset in the two alloys. It was also observed that the softening process progressed faster for smaller initial grain sizes. The effect of initial grain size is larger in the HP material and becomes more pronounced at low temperature.
Editor: Oxford: Elsevier Ltd
Idioma: Inglês

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Effect of initial grain size on dynamic recrystallization in high purity austenitic stainless steels

El Wahabi, M. ; Gavard, L. ; Montheillet, F. ; Cabrera, J.M. ; Prado, J.M.

Oxford: Elsevier Ltd

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