Effect of Strain Rate and Temperature on Nucleation of Dynamic Recrystallization at Triple Junctions in Fe-32Ni Alloy

Andiarwanto, Sutandyo; Miura, Hiromi; Sakai, Taku

doi:10.2355/tetsutohagane1955.90.5_257

Cited by 7 publications

(8 citation statements)

References 17 publications

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“…In related work, Miura et al have shown that twinning is an essential contributing mechanism to DRX nucleation in low to medium stacking fault energy metals [3,5]. In those investigations, nucleation occurred at triple junctions in both copper and stainless steel [4,5,12].…”

Section: 3mentioning

confidence: 96%

Nucleation of Dynamic Recrystallization at the Grain Boundaries of Copper Bicrystals

Miura

Sakai

Mogawa

et al. 2007

MSF

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Orientation-controlled copper bicrystals containing symmetrical 70o [0 0 1] tilt boundaries were deformed in tension at 923 K and at three initial strain rates from 4.2 x 10-5s-1 to 4.2 x 10-3s-1. The load was applied parallel to the grain boundary so as to eliminate grain boundary sliding. The nucleation of dynamic recrystallization (DRX) was investigated using optical microscopy and orientation imaging microscopy methods. After grain-boundary migration (GBM) and bulging, nuclei appeared behind the most deeply bulged grain boundary regions. The critical strain for nucleation was less than one-half of the peak strain and largely independent of the strain rate. At a fixed strain, nucleation is more frequent and the grain size finer as the strain rate is increased. All the nuclei were twin-related (Σ3) to the matrices. Furthermore, most of the twinning plane traces were parallel to the inactive slip traces of the bicrystals. This indicates that twin variant selection is essentially unaffected by dislocation motion. The observed mechanism of nucleation of DRX is discussed in relation to the occurrence of GBM and twinning.

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Section: 3mentioning

confidence: 96%

Nucleation of Dynamic Recrystallization at the Grain Boundaries of Copper Bicrystals

Miura

Sakai

Mogawa

et al. 2007

MSF

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“…29,30) Thus, according to the Taylor model, this analysis probably corresponds to the condition of grain boundaries or the deformed bands in the grains. The orientation of ultra low -carbon steel cold rolled at reduction ratio of 80% or of ferritic stainless-steel hot rolled at reduction ratio of 85% in the nonrecrystallized region is considered to be almost stable.…”

Section: Discussionmentioning

confidence: 99%

Development of Recrystallization Texture Prediction Method Linking with Deformation Texture Prediction Model

et al. 2012

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“…Nucleation at TJ is even possible at strains below yielding, i.e., without macroscopic plastic deformation. Andiarwanto et al [10] reported that nucleation at TJs onsets at 1/10 to 1/20 of the peak strain in a Fe-Ni alloy polycrystal. Such nucleation is accelerated and enhanced by the extensive occurrence of GBS.…”

Section: Introductionmentioning

confidence: 99%

Dynamic recrystallization behaviour at grain boundaries and triple junctions

Miura

2015

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Dynamic recrystallization (DRX) behaviour and nucleation mechanisms were investigated using copper and copper alloy bicrystals, tricrystals and polycrystals. New grains were preferentially formed along grain boundaries in the bicrystals. After grain-boundary migration and bulging, nuclei appeared behind the deeply bulged grain boundary regions. The critical strain for nucleation was about one-quarter to one-half of the peak strain. The characteristics of nucleation at a grain boundary depended sensitively on grain boundary character. In copper alloy bicrystals, nucleation was much delayed due to solute drag of migrating grain boundaries. The nucleation at triple junctions, in contrast, took place at a much lower strain. New grain formation at triple junction was stimulated by development of folds. All the new grains were twin-related (3) to the matrix and were formed behind the migrating grain boundaries. Therefore, it was revealed that the DRX mechanism in copper and copper alloys was essentially controlled by annealing twin formation. Variant selection of the twinning plane depended sensitively on the direction of the grain-boundary migration and on the geometry, however, was not affected by activated slip plane or dislocation glide. The DRX nucleation mechanisms at grain boundaries and at triple junctions are discussed with respect to grainboundary migration and annealing twin formation.

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Effect of Strain Rate and Temperature on Nucleation of Dynamic Recrystallization at Triple Junctions in Fe-32Ni Alloy

Cited by 7 publications

References 17 publications

Nucleation of Dynamic Recrystallization at the Grain Boundaries of Copper Bicrystals

Nucleation of Dynamic Recrystallization at the Grain Boundaries of Copper Bicrystals

Development of Recrystallization Texture Prediction Method Linking with Deformation Texture Prediction Model

Dynamic recrystallization behaviour at grain boundaries and triple junctions

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