Martensitbildung in Fe-basierten Legierungen während der Erwärmung von Stickstoff-Siedetemperatur

Translated title of the contribution: Investigation of martensite formation in Fe basead alloys during heating from boiling nitrogen temperature

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Abstract

The austenite-to-martensite transformation at temperatures below room temperature was investigated in situ by magnetometry in Fe-N, Fe-Cr-C and Fe-Cr-Ni based alloys. After quenching to room temperature, samples were immersed in boiling nitrogen and martensite formation was followed during subsequent heating to room temperature. Different tests were performed with heating rates ranging from 0.5 K/min to 10 K/min. For comparison a sample was up-quenched in water to verify whether martensite formation can be suppressed
at high heating rates. Thermally activated formation of martensite during heating was convincingly demonstrated for all investigated materials by showing heating rate dependent transformation kinetics. Moreover, magnetometry showed that the heating rate influences the fraction of martensite formed during the thermal treatment. The activation energy for thermally activated martensite formation as quantified by a Kissinger-like method lies in the range 11-18 kJ/mol and increases with the total fraction of interstitials in the alloy.
Original languageGerman
JournalH T M
Volume71
Issue number1
Pages (from-to)12-19
ISSN1867-2493
DOIs
Publication statusPublished - 2016

Keywords

  • Martensite
  • Steel
  • Cryogenic treatment
  • Kinetics of transformations
  • Magnetometry

Cite this

@article{d45037fd110a4e809a0fa0d6ad3b36b8,
title = "Martensitbildung in Fe-basierten Legierungen w{\"a}hrend der Erw{\"a}rmung von Stickstoff-Siedetemperatur",
abstract = "The austenite-to-martensite transformation at temperatures below room temperature was investigated in situ by magnetometry in Fe-N, Fe-Cr-C and Fe-Cr-Ni based alloys. After quenching to room temperature, samples were immersed in boiling nitrogen and martensite formation was followed during subsequent heating to room temperature. Different tests were performed with heating rates ranging from 0.5 K/min to 10 K/min. For comparison a sample was up-quenched in water to verify whether martensite formation can be suppressedat high heating rates. Thermally activated formation of martensite during heating was convincingly demonstrated for all investigated materials by showing heating rate dependent transformation kinetics. Moreover, magnetometry showed that the heating rate influences the fraction of martensite formed during the thermal treatment. The activation energy for thermally activated martensite formation as quantified by a Kissinger-like method lies in the range 11-18 kJ/mol and increases with the total fraction of interstitials in the alloy.",
keywords = "Martensite, Steel, Cryogenic treatment, Kinetics of transformations, Magnetometry",
author = "Matteo Villa and Christiansen, {Thomas Lundin} and Hansen, {Mikkel Fougt} and Somers, {Marcel A. J.}",
year = "2016",
doi = "10.3139/105.110276",
language = "Tysk",
volume = "71",
pages = "12--19",
journal = "H T M",
issn = "1867-2493",
publisher = "Carl Hanser Verlag GmbH & Co. KG",
number = "1",

}

Martensitbildung in Fe-basierten Legierungen während der Erwärmung von Stickstoff-Siedetemperatur. / Villa, Matteo; Christiansen, Thomas Lundin; Hansen, Mikkel Fougt; Somers, Marcel A. J.

In: H T M, Vol. 71, No. 1, 2016, p. 12-19.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Martensitbildung in Fe-basierten Legierungen während der Erwärmung von Stickstoff-Siedetemperatur

AU - Villa, Matteo

AU - Christiansen, Thomas Lundin

AU - Hansen, Mikkel Fougt

AU - Somers, Marcel A. J.

PY - 2016

Y1 - 2016

N2 - The austenite-to-martensite transformation at temperatures below room temperature was investigated in situ by magnetometry in Fe-N, Fe-Cr-C and Fe-Cr-Ni based alloys. After quenching to room temperature, samples were immersed in boiling nitrogen and martensite formation was followed during subsequent heating to room temperature. Different tests were performed with heating rates ranging from 0.5 K/min to 10 K/min. For comparison a sample was up-quenched in water to verify whether martensite formation can be suppressedat high heating rates. Thermally activated formation of martensite during heating was convincingly demonstrated for all investigated materials by showing heating rate dependent transformation kinetics. Moreover, magnetometry showed that the heating rate influences the fraction of martensite formed during the thermal treatment. The activation energy for thermally activated martensite formation as quantified by a Kissinger-like method lies in the range 11-18 kJ/mol and increases with the total fraction of interstitials in the alloy.

AB - The austenite-to-martensite transformation at temperatures below room temperature was investigated in situ by magnetometry in Fe-N, Fe-Cr-C and Fe-Cr-Ni based alloys. After quenching to room temperature, samples were immersed in boiling nitrogen and martensite formation was followed during subsequent heating to room temperature. Different tests were performed with heating rates ranging from 0.5 K/min to 10 K/min. For comparison a sample was up-quenched in water to verify whether martensite formation can be suppressedat high heating rates. Thermally activated formation of martensite during heating was convincingly demonstrated for all investigated materials by showing heating rate dependent transformation kinetics. Moreover, magnetometry showed that the heating rate influences the fraction of martensite formed during the thermal treatment. The activation energy for thermally activated martensite formation as quantified by a Kissinger-like method lies in the range 11-18 kJ/mol and increases with the total fraction of interstitials in the alloy.

KW - Martensite

KW - Steel

KW - Cryogenic treatment

KW - Kinetics of transformations

KW - Magnetometry

U2 - 10.3139/105.110276

DO - 10.3139/105.110276

M3 - Tidsskriftartikel

VL - 71

SP - 12

EP - 19

JO - H T M

JF - H T M

SN - 1867-2493

IS - 1

ER -