Anomalous kinetics of lath martensite formation in stainless steel

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Abstract

The kinetics of lath martensite formation in Fe-17.3 wt-%Cr-7.1 wt-%Ni-1.1 wt-%Al-0.08 wt-%C stainless steel was investigated with magnetometry and microscopy. Lath martensite forms during cooling, heating and isothermally. For the first time, it is shown by magnetometry during extremely slow isochronal cooling that transformation rate maxima occur, which are interrupted by virtually transformation free temperature regions. Microscopy confirms martensite formation after athermal nucleation of clusters followed by their time dependent growth. The observations are interpreted in terms of time dependent autocatalytic lath martensite formation followed by mechanical stabilisation of austenite during the transformation process.
Original languageEnglish
JournalMaterials Science and Technology
Volume31
Issue number11
Pages (from-to)1355-1361
ISSN0267-0836
DOIs
Publication statusPublished - 2015

Keywords

  • Phase transformation kinetics
  • Martensitic phase transformation
  • Stainless steel
  • Magnetometry

Cite this

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title = "Anomalous kinetics of lath martensite formation in stainless steel",
abstract = "The kinetics of lath martensite formation in Fe-17.3 wt-{\%}Cr-7.1 wt-{\%}Ni-1.1 wt-{\%}Al-0.08 wt-{\%}C stainless steel was investigated with magnetometry and microscopy. Lath martensite forms during cooling, heating and isothermally. For the first time, it is shown by magnetometry during extremely slow isochronal cooling that transformation rate maxima occur, which are interrupted by virtually transformation free temperature regions. Microscopy confirms martensite formation after athermal nucleation of clusters followed by their time dependent growth. The observations are interpreted in terms of time dependent autocatalytic lath martensite formation followed by mechanical stabilisation of austenite during the transformation process.",
keywords = "Phase transformation kinetics, Martensitic phase transformation, Stainless steel, Magnetometry",
author = "Matteo Villa and Hansen, {Mikkel Fougt} and Karen Pantleon and Somers, {Marcel A. J.}",
year = "2015",
doi = "10.1179/1743284714Y.0000000709",
language = "English",
volume = "31",
pages = "1355--1361",
journal = "Materials Science and Technology",
issn = "0267-0836",
publisher = "CRC Press/Balkema",
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}

Anomalous kinetics of lath martensite formation in stainless steel. / Villa, Matteo; Hansen, Mikkel Fougt; Pantleon, Karen; Somers, Marcel A. J.

In: Materials Science and Technology, Vol. 31, No. 11, 2015, p. 1355-1361.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Anomalous kinetics of lath martensite formation in stainless steel

AU - Villa, Matteo

AU - Hansen, Mikkel Fougt

AU - Pantleon, Karen

AU - Somers, Marcel A. J.

PY - 2015

Y1 - 2015

N2 - The kinetics of lath martensite formation in Fe-17.3 wt-%Cr-7.1 wt-%Ni-1.1 wt-%Al-0.08 wt-%C stainless steel was investigated with magnetometry and microscopy. Lath martensite forms during cooling, heating and isothermally. For the first time, it is shown by magnetometry during extremely slow isochronal cooling that transformation rate maxima occur, which are interrupted by virtually transformation free temperature regions. Microscopy confirms martensite formation after athermal nucleation of clusters followed by their time dependent growth. The observations are interpreted in terms of time dependent autocatalytic lath martensite formation followed by mechanical stabilisation of austenite during the transformation process.

AB - The kinetics of lath martensite formation in Fe-17.3 wt-%Cr-7.1 wt-%Ni-1.1 wt-%Al-0.08 wt-%C stainless steel was investigated with magnetometry and microscopy. Lath martensite forms during cooling, heating and isothermally. For the first time, it is shown by magnetometry during extremely slow isochronal cooling that transformation rate maxima occur, which are interrupted by virtually transformation free temperature regions. Microscopy confirms martensite formation after athermal nucleation of clusters followed by their time dependent growth. The observations are interpreted in terms of time dependent autocatalytic lath martensite formation followed by mechanical stabilisation of austenite during the transformation process.

KW - Phase transformation kinetics

KW - Martensitic phase transformation

KW - Stainless steel

KW - Magnetometry

U2 - 10.1179/1743284714Y.0000000709

DO - 10.1179/1743284714Y.0000000709

M3 - Journal article

VL - 31

SP - 1355

EP - 1361

JO - Materials Science and Technology

JF - Materials Science and Technology

SN - 0267-0836

IS - 11

ER -