Excellent Combination of Tensile ductility and strength due to nanotwinning and a biamodal structure in cryorolled austenitic stainless steel

Kumar, G. Venkata Sarath; Mangipudi, K. R.; Sastry, G. V. S.; Singh, Lalit Kumar; Dhanasekaran, S.; Sivaprasad, K.

doi:10.1038/s41598-019-57208-x

Cited by 12 publications

(2 citation statements)

References 23 publications

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“…Cryorolling is considered to be the prominent processing method to develop high strength materials. Even though considerable work is available on mechanical properties of cryorolled materials, mainly light alloys, titanium, and steels [27][28][29][30][31][32][33][34][35][36][37][38]. Cryorolling can improve strength and ductility therefore opening up further opportunities to applications in even more strength critical applications.…”

Section: Rolling Directionmentioning

confidence: 99%

The Influence of Annealing Temperature on the Magnetic Properties of Cryo-Rolled Non-Oriented Electrical Steel

Kvačkaj¹,

Demjan

Bella

et al. 2022

Acta Metall Slovaca

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The paper is focused on a comparison of the magnetic properties of the non-oriented isotropic electrical steel containing 3.5% Si. The material was processed by conventional ambient temperature rolling and progressive rolling at the cryogenic conditions at liquid nitrogen. Deformations of the samples in both thermal conditions were in the interval εÎ<5;35>[%]. Subsequently, the samples were heat treated at temperatures TÎ<900;1100> [°C]. Measuring of the magnetic properties was carried out in an alternating magnetic field at frequencies f= 50; 100; 150 Hz. At a frequency of 50 Hz were achieved smallest magnetic losses and therefore further measurements were made at a given frequency. Followed measurements of the magnetic induction were conducted at different intensities of the magnetic field. EBSD analyses were performed to obtain the IPF maps on which the resulting structure was evaluated after processing of the material. The specific magnetic losses were compared to different processing methods. The best magnetic properties defined as by minimal values of core loses were reached after samples rolled at cryogenic temperature followed by subsequently annealed. Also, higher proportion of cubic texture was archived after rolling at cryogenic temperature with compared to samples processed at ambient temperature.

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Section: Rolling Directionmentioning

confidence: 99%

The Influence of Annealing Temperature on the Magnetic Properties of Cryo-Rolled Non-Oriented Electrical Steel

Kvačkaj¹,

Demjan

Bella

et al. 2022

Acta Metall Slovaca

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“…It has been reported that dislocation slip is the main deformation mode when copper is severely deformed at room temperature [26,27]. However, the deformation of SMAT at cryogenic temperatures reduces dynamic recovery and recrystallization, and the deformation mechanism of grain refinement changes from dislocation to twin [28], which promotes the formation of twins. Therefore, a higher density of twins can be obtained through processing at cryogenic temperatures.…”

Section: Introductionmentioning

confidence: 99%

Effects of SMAT Temperature and Stacking Fault Energy on the Mechanical Properties and Microstructure Evolution of Cu-Al-Zn Alloys

Zhou,

Gong,

Sun

et al. 2023

Metals

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Alloys with a gradient structure (GS) exhibit a superior combination of strength and ductility. However, the effects of treatment temperature and stacking fault energy on the tensile behavior and microstructure evolution of GS alloys have not been systematically investigated. In this study, GS Cu-Al-Zn alloys with different stacking fault energy (SFE, 40/7 mJ/m2) were prepared using surface mechanical attrition treatment (SMAT) at cryogenic and room temperature, respectively. The microstructure results indicate that more stacking faults and deformation twins were activated in the SFE-7 alloys at cryogenic temperature, which led to higher strength compared to that of the alloys SMAT-ed at room temperature. In addition, it was found that the yield strength and hetero-deformation-induced (HDI) stress of the SFE-7 alloy were significantly higher than those of the SFE-40 alloy, resulting in a good combination of strength and ductility. Furthermore, more dispersed strain bands were observed in the SFE-7 sample during whole tensile deformation, which contributes to higher ductility.

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Iron‐Catalyzed Laser‐Induced Graphitization – Multiscale Analysis of the Structural Evolution and Underlying Mechanism

Dreimol,

Kürsteiner,

Ritter

et al. 2024

Small

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The transition to sustainable materials and eco‐efficient processes in commercial electronics is a driving force in developing green electronics. Iron‐catalyzed laser‐induced graphitization (IC‐LIG) has been demonstrated as a promising approach for rendering biomaterials electrically conductive. To optimize the IC‐LIG process and fully exploit its potential for future green electronics, it is crucial to gain deeper insights into its catalyzation mechanism and structural evolution. However, this is challenging due to the rapid nature of the laser‐induced graphitization process. Therefore, multiscale preparation techniques, including ultramicrotomy of the cross‐sectional transition zone from precursor to fully graphitized IC‐LIG electrode, are employed to virtually freeze the IC‐LIG process in time. Complementary characterization is performed to generate a 3D model that integrates nanoscale findings within a mesoscopic framework. This enabled tracing the growth and migration behavior of catalytic iron nanoparticles and their role during the catalytic laser‐graphitization process. A three‐layered arrangement of the IC‐LIG electrode is identified including a highly graphitized top layer with an interplanar spacing of 0.343 nm. The middle layer contained γ‐iron nanoparticles encapsulated in graphitic shells. A comparison with catalyst‐free laser graphitization approaches highlights the unique opportunities that IC‐LIG offers and discuss potential applications in energy storage devices, catalysts, sensors, and beyond.

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Excellent Combination of Tensile ductility and strength due to nanotwinning and a biamodal structure in cryorolled austenitic stainless steel

Cited by 12 publications

References 23 publications

The Influence of Annealing Temperature on the Magnetic Properties of Cryo-Rolled Non-Oriented Electrical Steel

The Influence of Annealing Temperature on the Magnetic Properties of Cryo-Rolled Non-Oriented Electrical Steel

Effects of SMAT Temperature and Stacking Fault Energy on the Mechanical Properties and Microstructure Evolution of Cu-Al-Zn Alloys

Iron‐Catalyzed Laser‐Induced Graphitization – Multiscale Analysis of the Structural Evolution and Underlying Mechanism

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