Study on effects of strong shear strain on recrystallized grain size of pure iron and microstructure control method

Nagashima, Fumihisa; Nakagawa, Yuki; Yoshino, Masahiko

doi:10.1016/j.promfg.2020.08.046

Cited by 5 publications

(3 citation statements)

References 15 publications

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“…The histograms suggest that average size of grains is about ~ 440 nm in the case of the as prepared powders but it almost doubles to ~ 840 nm in the case of the HT samples. Heat treatment induced enhancement in grain size is also reported by other researchers although the experimental conditions are not exactly similar [19][20].…”

Section: Microstructural Studiessupporting

confidence: 74%

Effect of Heat Treatment on Band Gap of V2O5

Nathawat¹,

Kumawat²,

Rathore³

et al. 2021

J. Nano- Electron. Phys.

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The most stable oxide of the vanadium oxide family is V2O5. A lot of research effort is focused on it because it has a multitude of functional applications. Here we report on how the heat treatment (600°C, 5 h, air) affects the microstructure and hence, the band gap of V2O5. The V2O5 powders, initially obtained by simple thermal dissociation (500 °C, 3 h, air) of ammonium metavanadate, followed by heat treatment of pellets; were studied. The structural and optical studies performed using X-ray diffraction (XRD), FESEM and UV-Vis techniques, provide uniquely interesting results which indicate the possibility of band gap tuning by controlling the microstructure.

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Section: Microstructural Studiessupporting

confidence: 74%

Effect of Heat Treatment on Band Gap of V2O5

Nathawat¹,

Kumawat²,

Rathore³

et al. 2021

J. Nano- Electron. Phys.

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“…All shearing conditions lengthened the grains near the incisions. [22,23] Figure 5 shows the IPF maps and Schmidt factor (SF) maps of the ND surfaces near the edges cut by the single blade. The SF [24,25] comprehensively showed the actuation degree of deformations with {111}<110>, {111}<112>, and {111}<123> slip bands.…”

Section: Resultsmentioning

confidence: 99%

Slanted Blades Optimizing Grain Texture and Work Hardening of Non‐Oriented Electrical Steel in Stress Coverages during Shearing and Blanking Processes

Zhao

Song

Wang

et al. 2021

steel research int.

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“…An efficient process employing a metal cutting method was proposed for producing ultrafine-grained steel [19]. Because the chip generated via metal cutting is subjected to severe shear plastic deformation, a sufficient amount of plastic deformation energy is ac-cumulated in it.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of subgrain formation during metal cutting and rolling based on the crystal plasticity theory

2022

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The grain refinement technology is important in improving the metallic material properties without the requirement of additional alloy elements. Previously, we developed an efficient method for producing ultrafine-grained steel strips using a combination of cutting and heat treatment. However, the effect of cutting on recrystallization was not apparent. The objective of this study is to investigate the effects of metal cutting on static recrystallization and outline its advantages in grain refinement using numerical simulations based on the crystal plasticity theory. Simulation results show that shear deformation in metal cutting activates more slip systems than plane strain compression via rolling, even when considering the same equivalent plastic strain. The geometrically necessary dislocations are assumed to accumulate in the crystal because many slip systems are activated in shear deformation and improve grain refinement via static recrystallization in the subsequent heat treatment. This result indicates that the deformation type plays an important role in the recrystallization process. Thus, cutting is more efficient than rolling for the production of ultrafine-grained steel.

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Study on effects of strong shear strain on recrystallized grain size of pure iron and microstructure control method

Cited by 5 publications

References 15 publications

Effect of Heat Treatment on Band Gap of V2O5

Effect of Heat Treatment on Band Gap of V2O5

Slanted Blades Optimizing Grain Texture and Work Hardening of Non‐Oriented Electrical Steel in Stress Coverages during Shearing and Blanking Processes

Numerical analysis of subgrain formation during metal cutting and rolling based on the crystal plasticity theory

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