Influence of Microalloying Elements on Recrystallization Texture of Warm-Rolled Interstitial Free Steels

Capdevila, Carlos; Amigó, V.; Caballero, Francisca G.; Andrés, Carlos García de; Salvador, M. D.

doi:10.2320/matertrans.mg200909

Cited by 16 publications

(8 citation statements)

References 27 publications

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“…The extent of work hardening generally is very less in the MAFprocessed materials [11]. This can be attributed to the increase in strain rate sensitivity with strain especially for the materials of high strain rate sensitivity like IF steel [1,3] reported almost same level improvement in the YS (600 MPa) after MAF of the IF steel; but the total elongation was reported to be much inferior (only 7.5%) compared to that of the present study (25%).…”

Section: Accepted Manuscriptcontrasting

confidence: 82%

“…It can be noticed from the literature that, in most cases, the improvement of the YS is also limited to less than 500 MPa for the thermomechanically processed IF steels. Rarely, the YS is reported to be over 600 MPa; and in that case the total A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT 3 elongation is reported to be very poor, e.g., only 7.5% [1]. To the best of our knowledge, hardly any literature is available on the effect of different critical temperatures on the thermomechanical behavior (i.e.…”

Section: Accepted Manuscriptmentioning

confidence: 92%

“…The major drawback of these steels is the low level of yield strength. Capdevila et al [3] explained that IF steels have interstitial-free bcc ferrite matrix which results low yield strength and high strain rate sensitivity.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

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Effect of critical temperatures on microstructures and mechanical properties of Nb–Ti stabilized IF steel processed by multiaxial forging

2016

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Section: Accepted Manuscriptcontrasting

confidence: 82%

Section: Accepted Manuscriptmentioning

confidence: 92%

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Effect of critical temperatures on microstructures and mechanical properties of Nb–Ti stabilized IF steel processed by multiaxial forging

2016

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“…Similar issues concerning the influence of hot working conditions on the change in yield stress and hardening were the subject of research in the works [ 37 , 49 , 50 , 51 , 52 ]. For example, in [ 37 ], investigations were carried out to determine the conditions of hot working of two microalloyed steels, type Ti-V (steel A) and Ti-Nb-V (steel B).…”

Section: Discussionmentioning

confidence: 96%

Hot Working Behavior in Multiphase Steel with Ti and V

Wojtacha

Opiela

2022

Materials

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This study investigated the effect of hot working conditions on changes in yield stress and the softening degree in the newly developed multiphase steel with Ti and V microadditions. The research was performed on the GLEEBLE 3800 thermomechanical simulator. In order to determine the σ-ε curves, continuous compression tests were carried out. The samples were plastically deformed at temperatures from 900 °C to 1100 °C at the rate of 0.1 s−1, 1 s−1 and 10 s−1. The activation energy of the plastic deformation was 375 kJ·mol−1. The analysis of the shape and course of the curves indicated that the decrease in strain hardening was mainly the result of the continuous dynamic recrystallization process. Two-stage compression with isothermal holding of the samples was also carried out between the two stages of deformation lasting from 1 s to 50 s. The structure of primary austenite was generated using the ARPGE software. The different size of austenite grain is the result of various thermally activated processes—when increasing the strain rate from 0.1 s−1 to 10 s−1, the average grain size of the primary austenite decreases from approx. 16 µm to approx. 6 µm. The time t0.5 needed to form 50% of the austenite fraction recrystallized at 1100 °C is approx. 4 s and extends to approx. 10 s with the reduction in the plastic deformation temperature to 900 °C. The time of complete austenite recrystallization tR, which varies from approx. 50 s to approx. 90 s in the tested temperature range, lengthens even more. The obtained results make it possible to develop thermomechanical treatment technology for the production of forgings from the tested multiphase steel.

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“…These elements should block the migration of the carbon and nitrogen to the GB. The authors 7,8 offer equations for a calculation of the required amount of Ti and Nb to stabilize the interstitials in IF steels: Ti = 4C + 3.42N + 1.5S while the optimal Nb content is: Nb = (7.75Ti -3.42N -1.5S)/4 Table 3 shows the correspondence between the investigated IF-steel's chemical composition and the Ti and Nb alloying requirements for capturing the structural-free carbon and nitrogen.…”

Section: Influence Of the Concentration Of Carbide-and Nitride-forminmentioning

confidence: 99%

The kinetics of small-impurity grain-boundary-segregation formation in cold-rolled deep-drawing 08C-Al and IF steels during post-deformation annealing

Rashkovskiy¹,

Ковалев²,

Wainstein³

2015

Mater. Tehnol.

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An investigation of small-impurity grain-boundary-segregation (GBS) kinetics in deep-drawing steels (DDSs) allows us to improve the mechanical properties of these steels by optimizing the post-deformation heat-treatment parameters. The kinetics of the GBS formation for C, N, P and S was determined with a series of isothermal expositions of specimens in the spectrometer work chamber at temperatures of 250-650°C. The surface chemical composition of the samples was measured with Auger electron spectroscopy (AES). Isodose C-curves of the GBS for each detected impurity were plotted. The time -temperature intervals of the preferential GB enrichment with C, N, P, S were determined for the 08C-Al steel with various reduction ratios and for the IF-steels with various concentrations of the micro-alloying elements Nb and Ti. It was found that cold rolling of the 08C-Al steel with a reduction ratio from 48 % to 80 % dramatically increases the preferential carbon GBS temperature from 350°C to 450°C due to the necessity of the carbon detachment from Cottrell atmospheres with the annealing of dislocations. The influence of the IF-steel micro-alloying with Nb and Ti on the concurrent multicomponent GBS of interstitial and substitution impurities is also demonstrated in the article. Keywords: deep-drawing steels, IF-steels, grain-boundary segregation, Auger electron spectroscopy, annealing, dislocation structure, microalloying Preiskava kinetike segregacije ne~isto~po mejah zrn (GBS) v jeklih za globoki vlek (DDS) omogo~a izbolj{anje mehanskih lastnosti teh jekel z optimizacijo parametrov toplotne obdelave po hladni deformaciji. Kinetika nastanka GBS za C, N, P in S je bila dolo~ena s serijo izotermne izpostavitve vzorcev v delovni komori spektrometra pri temperaturah 250-650°C. Kemijska sestava povr{ine je bila izmerjena z Augerjevo elektronsko spektroskopijo (AES). Narisane so bile krivulje enakih odmerkov C za GBS za vsako odkrito ne~isto~o. Intervali~as -temperatura preferen~nih GB-obogatitev C, N, P, S so bili dolo~eni za 08C-Al jeklo pri razli~nih stopnjah redukcije in za IF-jekla z razli~nimi koncentracijami mikrolegirnih elementov Nb in Ti. Ugotovljeno je, da pri hladnem valjanju 08C-Al-jekla s stopnjo redukcije med 48 % in 80 % naraste preferen~na temperatura GBC ogljika iz 350°C na 450°C zaradi potrebe razdvojitve ogljika iz Cottrellovega oblaka z`arjenjem dislokacij. V~lanku je prikazan tudi vpliv mikrolegiranja z Nb in Ti v IF-jeklu na so~asno ve~komponentno GBS intersticijskih in substitucijskih ne~isto~.

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Influence of Microalloying Elements on Recrystallization Texture of Warm-Rolled Interstitial Free Steels

Cited by 16 publications

References 27 publications

Effect of critical temperatures on microstructures and mechanical properties of Nb–Ti stabilized IF steel processed by multiaxial forging

Effect of critical temperatures on microstructures and mechanical properties of Nb–Ti stabilized IF steel processed by multiaxial forging

Hot Working Behavior in Multiphase Steel with Ti and V

The kinetics of small-impurity grain-boundary-segregation formation in cold-rolled deep-drawing 08C-Al and IF steels during post-deformation annealing

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