Effect of pre-existing martensite on the isothermal transformation kinetics below the Ms temperature in a low-chigh-Si steel

Alfonso Navarro-López; Jilt Sietsma; M.J. Santofimia Navarro

Effect of pre-existing martensite on the isothermal transformation kinetics below the M_s temperature in a low-chigh-Si steel

Alfonso Navarro-López, Jilt Sietsma, M.J. Santofimia Navarro

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

Abstract

Thermomechanical processing of Advanced Multiphase High Strength Steels often includes isothermal treatments around the martensite start temperature (Ms). Investigations show that the presence of martensite prior to these isothermal treatments accelerates the kinetics of the subsequent transformation. The aim of this study is to determine whether the presence of a small volume fraction of martensite affects the nucleation kinetics of the subsequent transformation, as well as to qualitatively and quantitatively determine this contribution. For this purpose, dilatometry experiments were performed at different temperatures above and below M_s in a lowcarbon high-silicon steel. The isothermal product formed both above and below M_s has been identified as bainitic ferrite. The transformation kinetics analysis demonstrated that the bainitic ferrite formation is much faster below M_s than above M_s, with a difference of two orders of magnitude.

Original language	English
Title of host publication	PTM 2015 - Proceedings of the International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015
Editors	L.-Q. Chen, M. Militzer, G. Botton et al
Publisher	International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015
Pages	559-560
ISBN (Electronic)	9780692437360
Publication status	Published - 2015
Event	International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015, PTM 2015 - Whistler, Canada Duration: 28 Jun 2015 → 3 Jul 2015

Conference

Conference	International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015, PTM 2015
Abbreviated title	PTM 2015
Country/Territory	Canada
City	Whistler
Period	28/06/15 → 3/07/15

Keywords

Dilatometry
Isothermal treatments
Martensite
Transformation kinetics

Cite this

Navarro-López, A., Sietsma, J., & Santofimia Navarro, M. J. (2015). Effect of pre-existing martensite on the isothermal transformation kinetics below the M_s temperature in a low-chigh-Si steel. In L.-Q. Chen, M. Militzer, & G. Botton et al (Eds.), PTM 2015 - Proceedings of the International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015 (pp. 559-560). International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015.

Navarro-López, Alfonso ; Sietsma, Jilt ; Santofimia Navarro, M.J. / Effect of pre-existing martensite on the isothermal transformation kinetics below the M_s temperature in a low-chigh-Si steel. PTM 2015 - Proceedings of the International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015. editor / L.-Q. Chen ; M. Militzer ; G. Botton et al. International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015, 2015. pp. 559-560

@inproceedings{bd20eadd907c45319bf6958bfe454663,

title = "Effect of pre-existing martensite on the isothermal transformation kinetics below the Ms temperature in a low-chigh-Si steel",

abstract = "Thermomechanical processing of Advanced Multiphase High Strength Steels often includes isothermal treatments around the martensite start temperature (Ms). Investigations show that the presence of martensite prior to these isothermal treatments accelerates the kinetics of the subsequent transformation. The aim of this study is to determine whether the presence of a small volume fraction of martensite affects the nucleation kinetics of the subsequent transformation, as well as to qualitatively and quantitatively determine this contribution. For this purpose, dilatometry experiments were performed at different temperatures above and below Ms in a lowcarbon high-silicon steel. The isothermal product formed both above and below Ms has been identified as bainitic ferrite. The transformation kinetics analysis demonstrated that the bainitic ferrite formation is much faster below Ms than above Ms, with a difference of two orders of magnitude.",

keywords = "Dilatometry, Isothermal treatments, Martensite, Transformation kinetics",

author = "Alfonso Navarro-L{\'o}pez and Jilt Sietsma and {Santofimia Navarro}, M.J.",

year = "2015",

language = "English",

pages = "559--560",

editor = "Chen, {L.-Q. } and Militzer, {M. } and {Botton et al}, G.",

booktitle = "PTM 2015 - Proceedings of the International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015",

publisher = "International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015",

note = "International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015, PTM 2015, PTM 2015 ; Conference date: 28-06-2015 Through 03-07-2015",

}

Navarro-López, A, Sietsma, J & Santofimia Navarro, MJ 2015, Effect of pre-existing martensite on the isothermal transformation kinetics below the M_s temperature in a low-chigh-Si steel. in L-Q Chen, M Militzer & G Botton et al (eds), PTM 2015 - Proceedings of the International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015. International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015, pp. 559-560, International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015, PTM 2015, Whistler, Canada, 28/06/15.

Effect of pre-existing martensite on the isothermal transformation kinetics below the M_s temperature in a low-chigh-Si steel. / Navarro-López, Alfonso; Sietsma, Jilt ; Santofimia Navarro, M.J.
PTM 2015 - Proceedings of the International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015. ed. / L.-Q. Chen; M. Militzer; G. Botton et al. International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015, 2015. p. 559-560.

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

TY - GEN

T1 - Effect of pre-existing martensite on the isothermal transformation kinetics below the Ms temperature in a low-chigh-Si steel

AU - Navarro-López, Alfonso

AU - Sietsma, Jilt

AU - Santofimia Navarro, M.J.

PY - 2015

Y1 - 2015

N2 - Thermomechanical processing of Advanced Multiphase High Strength Steels often includes isothermal treatments around the martensite start temperature (Ms). Investigations show that the presence of martensite prior to these isothermal treatments accelerates the kinetics of the subsequent transformation. The aim of this study is to determine whether the presence of a small volume fraction of martensite affects the nucleation kinetics of the subsequent transformation, as well as to qualitatively and quantitatively determine this contribution. For this purpose, dilatometry experiments were performed at different temperatures above and below Ms in a lowcarbon high-silicon steel. The isothermal product formed both above and below Ms has been identified as bainitic ferrite. The transformation kinetics analysis demonstrated that the bainitic ferrite formation is much faster below Ms than above Ms, with a difference of two orders of magnitude.

AB - Thermomechanical processing of Advanced Multiphase High Strength Steels often includes isothermal treatments around the martensite start temperature (Ms). Investigations show that the presence of martensite prior to these isothermal treatments accelerates the kinetics of the subsequent transformation. The aim of this study is to determine whether the presence of a small volume fraction of martensite affects the nucleation kinetics of the subsequent transformation, as well as to qualitatively and quantitatively determine this contribution. For this purpose, dilatometry experiments were performed at different temperatures above and below Ms in a lowcarbon high-silicon steel. The isothermal product formed both above and below Ms has been identified as bainitic ferrite. The transformation kinetics analysis demonstrated that the bainitic ferrite formation is much faster below Ms than above Ms, with a difference of two orders of magnitude.

KW - Dilatometry

KW - Isothermal treatments

KW - Martensite

KW - Transformation kinetics

UR - http://www.scopus.com/inward/record.url?scp=84962701459&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:84962701459

SP - 559

EP - 560

BT - PTM 2015 - Proceedings of the International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015

A2 - Chen, L.-Q.

A2 - Militzer, M.

A2 - Botton et al, G.

PB - International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015

T2 - International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015, PTM 2015

Y2 - 28 June 2015 through 3 July 2015

ER -

Navarro-López A, Sietsma J , Santofimia Navarro MJ. Effect of pre-existing martensite on the isothermal transformation kinetics below the M_s temperature in a low-chigh-Si steel. In Chen LQ, Militzer M, Botton et al G, editors, PTM 2015 - Proceedings of the International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015. International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015. 2015. p. 559-560

Effect of pre-existing martensite on the isothermal transformation kinetics below the M_s temperature in a low-chigh-Si steel

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