Evaluation of the Proportion of Phases and Mechanical Strength of Two-Phase Steels Using Barkhausen Noise Measurements: Application to Commercial Dual-Phase Steel

Kléber, Xavier; Hug-Amalric, Aurélie; Merlin, J.

doi:10.1007/s11661-008-9508-3

Cited by 21 publications

(5 citation statements)

References 17 publications

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“…According to Kleber et al [12] the ferrite presents a higher Barkhausen Noise Amplitude (BNA) while the martensite shows lower amplitude, which is in good agreement with the present results. As martensite loose gradually its tetragonality, its lattice parameter become closer to the ferrite BCC lattice parameter.…”

supporting

confidence: 93%

Microstructural Evolution of AISI D2 Tool Steel during Aging

Farina

Capo³

et al. 2011

SSP

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The effects of low temperature isothermal treatments on a quenched AISI D2 tool steel was studied using Barkhausen Noise, X-ray diffraction, dilatometry and optical and electronic microscopy. The specimens were austenitized at 1040°C and quenched in oil. The isothermal treatments involved immersion in hot oil baths at 80° or 130°C for 0.1, 0.6, 1, 3, 10 and 30 hours, except for the dilatometry, in which the specimens were submitted to a single thermal cycle for 30 hours. These thermal treatments are industrially known as “stress relief treatments”, and are used to prevent cracks and catastrophic failures during cryogenic treatments. The comparison of global and local (microscopy) measurements allows the discussion of the phenomena involved in the aging process.

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supporting

confidence: 93%

Microstructural Evolution of AISI D2 Tool Steel during Aging

Farina

Capo³

et al. 2011

SSP

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“…Corresponding magnetic field (H peak ) describing the position of BNA in the applied field. The BNA is decreasing with a growth of defect concentration, residual stress or hardness [19]. The position of the BNA peak -H peak can establish a grain size as was published in [21].…”

Section: Experimental Techniquementioning

confidence: 71%

“…During the measurement, the structure composed of domains starts to reorganize according to the external field. This phenomenon requires a movement of the domains which is made by discontinuous jumps recorded as MBN signal [19]. The defects located in the samples act as pinning sites for the magnetic domains and hinder the movement of the magnetic domains.…”

Section: Experimental Techniquementioning

confidence: 99%

Vacancy Type Defects in Oxide Dispersion Strengthened Steels

Slugeň

Veterníková

Degmová

et al. 2012

MSF

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This study was focused on commercial oxide-dispersion strengthened (ODS) steels - MA 956 (20%Cr), PM 2000 (19%Cr), ODM 751 (16%Cr) and MA 957 (14%Cr) developed for fuel cladding of GEN IV reactors. The ODS steels are described in order to comparison of their microstructure features. Vacancy defects were observed by Doppler Broadening Spectroscopy (DBS) and Positron Annihilation Lifetime Spectroscopy (PALS). Residual stress proportional to all kinds of defects was investigated by Magnetic Barkhausen Noise (MBN) measurement. The highest presence of open volume defects was found in MA 956 and the lowest defect concentration in MA 957, although this steel contains the largest defects (six-vacancies together with dislocations). Other investigated steels demonstrated probably three- or four-vacancy clusters. Further, results from positron technique indicated proportionality of chromium content to defect concentration. Magnetic Barkhausen noise results also showed that Hpeak value (describing grain size) increased with growth of chromium content. However residual stress was independent on chromium level.

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“…Recently MBN techniques have become more available, following progresses in electronic instrumentation and the spread of the use of these techniques as a tool for non-destructive testing and inspection of materials and engineering structures. Following this availability, recent papers started using MBN for the evaluation of the proportion of phases in two phases materials [3], to characterize the amount of martensite formed during deformation of metastable austenite in TRIP materials, the formation of α'-martensite due to room-temperature plastic tensile loading in austenite stainless steel, the effects of cold work and annealing heat treatments of those steels [4]. Vincent et al [5] have used MBN for investigating strain induced α'-martensite during low cycle fatigue of stainless steels, Błachnio [6] has shown that the any change in dislocation distribution and the accompanying increase in the misorientation of sub-grains as well as the modification of retained austenite precipitates both considerably affect MBN intensity.…”

Section: Introductionmentioning

confidence: 99%

The Use of Barkhausen Noise to Study the Martensitic Phase Transformation

Huallpa

Farina

Capo³

et al. 2011

SSP

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The use of magnetic Barkhausen (MBN) noise methods to detect the austenite to martensite phase transformation during cooling of steel specimens was explored, using three different configurations: conventional Barkhausen noise emission stimulated by an alternating magnetic field, the Okamura method, that measures magnetic noise emission under a fixed DC field and a novel experimental technique that measures spontaneous magnetic emission during transformation, in the absence of any external field. The phenomena associated with the phase transformation were also followed by electrical resistivity measurements and the resulting samples were characterized using optical and scanning electron microscopy. MBN measurements on a AISI D2 tool steel austenitized at 1473K and cooled to liquid nitrogen temperature exhibited a clear change near 225 K during cooling, corresponding to the Ms (martensite start ) temperature, as confirmed by resistivity measurements. Spontaneous magnetic noise emission measurements made in situ during cooling of a sample immerged in liquid nitrogen showed that individual “burst” phenomena could be detected, in a manner similar to acoustic emission (AE) measurements. This magnetic emission (ME) can thus be considered a new experimental tool for the study of martensite transformations in ferrous alloys.

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Evaluation of the Proportion of Phases and Mechanical Strength of Two-Phase Steels Using Barkhausen Noise Measurements: Application to Commercial Dual-Phase Steel

Cited by 21 publications

References 17 publications

Microstructural Evolution of AISI D2 Tool Steel during Aging

Microstructural Evolution of AISI D2 Tool Steel during Aging

Vacancy Type Defects in Oxide Dispersion Strengthened Steels

The Use of Barkhausen Noise to Study the Martensitic Phase Transformation

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