Recovery Processes in the Ferrite Phase in C-Mn Steel

Smith, A. I.; Luo, Haiwen; Hanlon, D. N.; Sietsma, Jilt; Zwaag, Sybrand van der

doi:10.2355/isijinternational.44.1188

Cited by 30 publications

(24 citation statements)

References 26 publications

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“…10,27,51,52) Though the importance of recovery is universally acknowledged, involved experimental studies on recovery are at best 'limited'. 10,27,[30][31][32][33][34][35][36][37][38][39] There are multiple reasons: clear demarcation between plastic deformation and recovery, difficulties in exact quantification of associated microstructural changes, involvement of multiple mechanisms and orientation dependent recovery. 10,27) The last point provided motivation behind the present study.…”

Section: Discussionmentioning

confidence: 99%

“…Recovery involves multiple micro-mechanisms and unlike the standard microstructural features, is intrinsically difficult to quantify. 10,[27][28][29] The quantification of recovery typically involves changes in properties 10,27,[30][31][32][33][34][35][36] and/or microstructural features. 10,27,[37][38][39] While the former has limited sensitivity, the microstructural features affected by recovery often demand sophisticated measurements.…”

Section: Introductionmentioning

confidence: 99%

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Orientation Dependent Recovery in Interstitial Free Steel

Khatirkar

Vadavadagi²,

Shekhawat³

et al. 2012

ISIJ Int.

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Cold rolled (40, 60 and 80% thickness reductions from hot-band) interstitial free (IF) steel samples were recovered at 500°C for different times (15 min to 32 h). The recovery kinetics, studied through a combination of X-ray line profile analysis and high resolution electron diffraction, were best represented by logarithmic relationship. Though the kinetics was dependent on the prior deformation, γ (ND//<111>) fibre clearly had stronger recovery than θ (ND//<100>) fibre. Recovery was observed, statistically to create grain interior strain localizations: an orientation independent phenomenon. Increase in misorientation across such strain localizations was, however, orientation dependent. This was responsible for enhanced in-grain misorientation in recovered γ-fibre grains/bands. Extended recovery of 80% pre-deformed samples also led to coarsening of γ-fibre bands: strain induced boundary migration (SIBM) or uniform movement of γ-fibre boundaries into neighbouring non γ-fibre orientations.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Orientation Dependent Recovery in Interstitial Free Steel

Khatirkar

Vadavadagi²,

Shekhawat³

et al. 2012

ISIJ Int.

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“…Ali SMITH, 1,2) Silvio E. KRUGER, 3) Jilt SIETSMA 2) and Sybrand van der ZWAAG The static recrystallization kinetics of hot deformed austenite were characterised by a combination of insitu laser-ultrasonics and stress relaxation measurements. Samples were deformed in compression at temperatures of 850°C and 900°C.…”

Section: Laser-ultrasonic Monitoring Of Austenite Recrystallization Imentioning

confidence: 99%

“…[1][2][3][4] In this technique samples can also be quenched, etched and analysed by optical microscopy to reveal the austenite grain size just before quenching. This allows assessment of the evolution in grain size during recrystallization and grain growth.…”

Section: Introductionmentioning

confidence: 99%

Laser-ultrasonic Monitoring of Austenite Recrystallization in C–Mn Steel

Smith¹,

Kruger²,

Sietsma³

et al. 2006

ISIJ Int.

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“…Currently these two phenomena are best studied by using the more established in situ stress relaxation technique [18][19][20][21].It can be argued that a combination of stress relaxation measurements and simultaneous ultrasonic measurements will strongly facilitate the interpretation of ultrasonics data. This concept will be applied in the present paper.…”

Section: Introductionmentioning

confidence: 99%

Laser-ultrasonic monitoring of ferrite recovery in ultra low carbon steel

Smith

Kruger

Sietsma

et al. 2007

Materials Science and Engineering: A

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Laser-ultrasonic monitoring of ferrite recovery in ultra low carbon steel Smith, A.; Krüger, S. E.; Sietsma, J.; van der Zwaag, S.Contact us / Contactez nous: nparc.cisti@nrc-cnrc.gc.ca. AbstractThe static recovery kinetics of warm deformed ferrite have been characterized by a combination of in situ laser ultrasonics and stress relaxation measurements. During recovery the ultrasonic velocity change decreased whilst the ultrasonic attenuation generally remained constant. The velocity change was explained in terms of dislocation damping, whilst for the attenuation the results were due to a combination of grain scattering and dislocation damping. From the ultrasonic velocity and attenuation measurements, the dislocation density and pinning point separation have been determined using a model in the literature. These values have been compared to those obtained from stress relaxation data for the same experimental conditions. The results showed that the difference in calculated dislocation densities differed by one or two orders of magnitude. The difference in the values of pinning point separation was about one order of magnitude. Finally possible reasons for these differences have been discussed with reference to the dislocation structure present during recovery.

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Recovery Processes in the Ferrite Phase in C-Mn Steel

Cited by 30 publications

References 26 publications

Orientation Dependent Recovery in Interstitial Free Steel

Orientation Dependent Recovery in Interstitial Free Steel

Laser-ultrasonic Monitoring of Austenite Recrystallization in C–Mn Steel

Laser-ultrasonic monitoring of ferrite recovery in ultra low carbon steel

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