Acoustic Emission During Austenite → ε Martensitic Phase Transformation in TWIP/TRIP Steels

M. K. Bolgár, E. Nagy, L. Daróczi, M. Benke, V. Mertinger, D. Beke

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Abstract

Acoustic emission in two different TWIP/TRIP steels during thermally induced γ–ε martensitic phase transformation was investigated. Large asymmetry was observed: the noise activity was considerably larger for heating than cooling. This was explained by the plastic deformation and strain-induced martensite nucleation (which usually provides much lower acoustic emission signals) in the austenite during cooling. The amplitude and energy probability distribution functions for heating followed the power-law behavior, and the critical exponents were counted as well. The amplitude and energy exponents (α and ε, respectively) for the two different samples were the same within the errors (α = 2.4 ± 0.2, ε = 1.7 ± 0.1), indicating the universal character. The acoustic activity vs martensite volume faction showed a maximum at around 60 pct for heating, which is most probably related to the coming apart of the elastic fields of the martensite variants.

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Steel
acoustic emission
Acoustic emissions
austenite
martensite
Martensite
Austenite
phase transformations
Phase transitions
steels
Heating
heating
Plastic deformation
exponents
Cooling
cooling
probability distribution functions
Probability distributions
plastic deformation
Distribution functions

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

Cite this

@article{2ebb452f0cfe4c5da06e8275fd4c7e39,
title = "Acoustic Emission During Austenite → ε Martensitic Phase Transformation in TWIP/TRIP Steels",
abstract = "Acoustic emission in two different TWIP/TRIP steels during thermally induced γ–ε martensitic phase transformation was investigated. Large asymmetry was observed: the noise activity was considerably larger for heating than cooling. This was explained by the plastic deformation and strain-induced martensite nucleation (which usually provides much lower acoustic emission signals) in the austenite during cooling. The amplitude and energy probability distribution functions for heating followed the power-law behavior, and the critical exponents were counted as well. The amplitude and energy exponents (α and ε, respectively) for the two different samples were the same within the errors (α = 2.4 ± 0.2, ε = 1.7 ± 0.1), indicating the universal character. The acoustic activity vs martensite volume faction showed a maximum at around 60 pct for heating, which is most probably related to the coming apart of the elastic fields of the martensite variants.",
author = "Bolg{\'a}r, {M. K.} and E. Nagy and L. Dar{\'o}czi and M. Benke and V. Mertinger and D. Beke",
year = "2019",
month = "1",
day = "1",
doi = "10.1007/s11661-019-05291-0",
language = "English",
journal = "Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science",
issn = "1073-5623",

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TY - JOUR

T1 - Acoustic Emission During Austenite → ε Martensitic Phase Transformation in TWIP/TRIP Steels

AU - Bolgár, M. K.

AU - Nagy, E.

AU - Daróczi, L.

AU - Benke, M.

AU - Mertinger, V.

AU - Beke, D.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Acoustic emission in two different TWIP/TRIP steels during thermally induced γ–ε martensitic phase transformation was investigated. Large asymmetry was observed: the noise activity was considerably larger for heating than cooling. This was explained by the plastic deformation and strain-induced martensite nucleation (which usually provides much lower acoustic emission signals) in the austenite during cooling. The amplitude and energy probability distribution functions for heating followed the power-law behavior, and the critical exponents were counted as well. The amplitude and energy exponents (α and ε, respectively) for the two different samples were the same within the errors (α = 2.4 ± 0.2, ε = 1.7 ± 0.1), indicating the universal character. The acoustic activity vs martensite volume faction showed a maximum at around 60 pct for heating, which is most probably related to the coming apart of the elastic fields of the martensite variants.

AB - Acoustic emission in two different TWIP/TRIP steels during thermally induced γ–ε martensitic phase transformation was investigated. Large asymmetry was observed: the noise activity was considerably larger for heating than cooling. This was explained by the plastic deformation and strain-induced martensite nucleation (which usually provides much lower acoustic emission signals) in the austenite during cooling. The amplitude and energy probability distribution functions for heating followed the power-law behavior, and the critical exponents were counted as well. The amplitude and energy exponents (α and ε, respectively) for the two different samples were the same within the errors (α = 2.4 ± 0.2, ε = 1.7 ± 0.1), indicating the universal character. The acoustic activity vs martensite volume faction showed a maximum at around 60 pct for heating, which is most probably related to the coming apart of the elastic fields of the martensite variants.

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