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A grain scale approach for modeling steady-state discontinuous dynamic recrystallization
- Source :
- Acta Materialia, Acta Materialia, 2009, 57 (5), pp.1602-1612. ⟨10.1016/j.actamat.2008.11.044⟩, Acta Materialia, Elsevier, 2009, 57 (5), pp.1602-1612. ⟨10.1016/j.actamat.2008.11.044⟩
- Publication Year :
- 2009
- Publisher :
- HAL CCSD, 2009.
-
Abstract
- International audience; Discontinuous dynamic recrystallization (DDRX) generally occurs in low-stacking-fault-energy metals. New grains nucleate and grow at the expense of the strain-hardened older grains. A steady-state flow stress independent of initial conditions is experimentally observed. A general model is proposed to describe these phenomena. While the transient behavior can be addressed only numerically, a steady state is described in detail by closed-form relationships. The approach includes strain hardening and dynamic recovery, nucleation, growth and shrinkage of grains. Furthermore, the strain-hardening equation can be supplemented to account for the effect of boundary-migration-induced softening (BMIS). The present paper first states the general equations of the model; some simple strain-hardening laws neglecting BMIS are then discussed. Finally, a method for evaluating the material parameters is described and illustrated by the example of 304L stainless steel.
- Subjects :
- Materials science
Polymers and Plastics
Nucleation
Dynamic recrystallization
02 engineering and technology
Flow stress
01 natural sciences
[SPI.MAT]Engineering Sciences [physics]/Materials
Hot working
Grain-boundary migration
Analytical methods
0103 physical sciences
Softening
010302 applied physics
Steady state
Metallurgy
Metals and Alloys
Modeling
Mechanics
Strain hardening exponent
021001 nanoscience & nanotechnology
Electronic, Optical and Magnetic Materials
Ceramics and Composites
Grain boundary
0210 nano-technology
Subjects
Details
- Language :
- English
- ISSN :
- 13596454
- Database :
- OpenAIRE
- Journal :
- Acta Materialia, Acta Materialia, 2009, 57 (5), pp.1602-1612. ⟨10.1016/j.actamat.2008.11.044⟩, Acta Materialia, Elsevier, 2009, 57 (5), pp.1602-1612. ⟨10.1016/j.actamat.2008.11.044⟩
- Accession number :
- edsair.doi.dedup.....5184b0d4de18236952192f5731bcac30