Recrystallization of niobium stabilized ferritic stainless steel during hot rolling simulation by torsion tests

Braga, Flávia Vieira; Escobar, Diana Pérez; Reis, Thompson Júnior Ávila; Oliveira, Nilton José Lucinda de; Andrade, Margareth Spangler

doi:10.1016/j.jmrt.2015.07.003

Cited by 13 publications

(3 citation statements)

References 9 publications

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“…Considering high plastic strain rates due to a predominantly shear stress field, the torsion test is important to develop models of constitutive phenomena of solid microstructures and to verify hardening characteristics of structures submitted to rotating efforts, which allows the reproduction of metallurgical effects for different strain levels and to replicate conditions similar to metallurgical processes of drawing and rolling on a laboratory scale. 16,15,14,17 The dynamical recovery and recrystallization during the rolling can be verified using torsion tests, which allow to replicate strain steps on a laboratory scale to assess the material susceptibility in cold processes or the dynamical recrystallization in hot processes. 16,15,18,17,19,20 In this context, this equipment has been used to develop Bachelor, Master, and Doctoral projects in the Undergraduate and Postgraduate Metallurgical Engineering programs of the Federal University of Ouro Preto.…”

Section: Educational Aspects and Impactsmentioning

confidence: 99%

“…16,15,14,17 The dynamical recovery and recrystallization during the rolling can be verified using torsion tests, which allow to replicate strain steps on a laboratory scale to assess the material susceptibility in cold processes or the dynamical recrystallization in hot processes. 16,15,18,17,19,20 In this context, this equipment has been used to develop Bachelor, Master, and Doctoral projects in the Undergraduate and Postgraduate Metallurgical Engineering programs of the Federal University of Ouro Preto.…”

Section: Educational Aspects and Impactsmentioning

confidence: 99%

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Students’ project for instrumentation and automation of a manually operated torsion testing machine with educational purposes

de Oliveira Filho,

de Faria,

Rocha

et al. 2023

International Journal of Mechanical Engineering Education

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From the pedagogical point of view, a very interesting initiative for engineering schools is to engage their students in design, renovation, or maintenance projects of laboratory equipment. It allows engineering students to work on real projects, with all the difficulties that arise in field testing, and to gain hands-on experience from the confrontation of practical situations and challenges, which presents positive outcomes regarding learning objectives and program appreciation. This article presents an engineering project developed by students for instrumentation and automation of an old manually operated torsion testing machine, for execution of accurate mechanical tests and reliable physical replications of real-world industrial processes on laboratory scale. An electrical resistive furnace is incorporated into the torsion testing machine to also allow hot torsion tests with controlled temperature. In addition to students’ skills development, this project yields a completely functional instrumented and automated torsion testing machine, with a controlled temperature electrical furnace and other features that have been used in Bachelor, Master, and Doctoral projects, laboratory classes, and new research.

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Section: Educational Aspects and Impactsmentioning

confidence: 99%

Section: Educational Aspects and Impactsmentioning

confidence: 99%

Students’ project for instrumentation and automation of a manually operated torsion testing machine with educational purposes

de Oliveira Filho,

de Faria,

Rocha

et al. 2023

International Journal of Mechanical Engineering Education

View full text Add to dashboard Cite

show abstract

“…They investigated variations in the geometry of the groove and the results showed that the largest groove depth and the lowest taper collar angle investigated required lower load and reduced fish tail formation. Braga et al [12] analysed recrystallization on Nb-stabilized AISI 430 ferritic stainless steel by applying hot torsion to simulate finishing rolling. The experiments were carried out at different temperatures and the results suggest that high temperature at the first passes would be beneficial to allow recrystallization while lower temperatures at the last passes are desirable for work hardening.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of the Hot Rolling Process of Steel Beams

et al. 2021

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The complete rolling schedule (25 passes) of steel beams in a mill was simulated to predict the final beam length, geometry of the cross-section, effective stress, effective plastic strain and rolling power for two cases; the first case corresponds to the hot rolling process assuming a constant temperature of 1200 ∘C. The simulation of the second case considered the real beam temperature at each pass to compare the results with in-plant measurements and validate the numerical model. Then, the results of both cases were compared to determine the critical passes of the process with high peaks of required power, coinciding with the reports at the mill. These critical passes share the same conditions, high percentage of reduction in cross-sectional area and low beam temperature. Additionally, a potential reduction of passes in the process was proposed identifying passes with low required power, minimal reduction in area of cross-section and essentially unchanged geometry. Therefore, it is reasonable to state that using the present research methodology, it is possible to have a better control of the process allowing innovation in the production of profiles with more complex geometries and new materials.

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