Complex magnetic and microstructural investigation of duplex stainless steel

Mészarós, István; Szabó, Péter Jánoš

doi:10.1016/j.ndteint.2004.12.007

Cited by 36 publications

(16 citation statements)

References 8 publications

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“…Each specimen was tested with the ferritoscope from HelmutFischer s , a commercial device used to measure the ferrite or martensite phases in austenitic and duplex stainless steels [15,16]. Before measurements the ferritoscope was calibrated with the duplex standard samples.…”

Section: Methodsmentioning

confidence: 99%

Magnetic detection of sigma phase in duplex stainless steel UNS S31803

Tavares

Pardal

Guerreiro

et al. 2010

Journal of Magnetism and Magnetic Materials

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a b s t r a c tDuplex stainless steels are high strength and corrosion resistant steels extensively used in the chemical and petrochemical industry. The best mechanical properties and corrosion resistance are obtained with a microstructure composed by equal parts of ferrite and austenite and free from tertiary phases. Sigma phase is one of these deleterious tertiary phases. In the present work different amounts of sigma phase were precipitated by heat treatments in a UNS S31803 stainless steel. Some specimens were cold rolled before sigma phase precipitation in order to evaluate the effect of deformation on the magnetic measurements. The amount of sigma phase was precisely determined by microscopy and image analysis for each heat treatment condition. The effects of sigma phase on the steel properties were investigated, confirming the detrimental effects of very small percentages on corrosion resistance and toughness. Two magnetic methods were used to detect sigma phase: magnetization saturation measurements in a Vibrating Sample Magnetometer and ferritoscope testing. Both methods were found to be sensitive to small percentages of sigma phase in the microstructure.

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Section: Methodsmentioning

confidence: 99%

Magnetic detection of sigma phase in duplex stainless steel UNS S31803

Tavares

Pardal

Guerreiro

et al. 2010

Journal of Magnetism and Magnetic Materials

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“…A magnetically hard α -martensite phase could be additionally formed in an austenitic matrix under plastic strain. Previous investigations demonstrated the usability of a magnetic method for duplex stainless steels which have been subjected to cold rolling or isothermal heat treatment [13][14][15][16][17]. In the case of cold-rolled steels, a good relationship between hysteresis properties (such as saturation magnetization, coercivity, and magnetic permeability) and the volume fraction of the deformed-induced α -martensite phase was suggested.…”

Section: Duplex Stainless Steelmentioning

confidence: 99%

Magnetic Investigations of Steel Degradation Using a Magnetic Hysteresis Scaling Technique

Kobayashi

Miura

Narita

et al. 2017

Metals

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Abstract:We report the results of magnetic measurements on austenitic stainless steels and duplex stainless steels using a magnetic hysteresis scaling technique. Unlike saturation hysteresis loops, this scaling technique, which uses a set of minor hysteresis loops, can be used in low measurement fields. We show that there is a universal scaling power law between minor-loop parameters, which is independent from the level of deformation. The behavior of a coefficient deduced from the scaling law was explained from the viewpoint of the morphology of a ferromagnetic phase.

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“…Normando [19] applied the MBN for analysing the sigma phase (Fe-Cr) in duplex stainless steels during heat treatment and welding. Mészáros [20] studied the microstructure of duplex stainless steels after different regimes of heat treatment by using the MBN. Lindgren [21] reported about the relationship between RSs and MBN in duplex stainless steels.…”

Section: Introductionmentioning

confidence: 99%

Surface Integrity after Turning a Duplex Stainless Steel with Respect to Tool Geometry

Čapek

Kolařík

Neslušan

et al. 2019

TFAMENA

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This study deals with surface integrity expressed in terms of stress state as well as microstructure alterations after turning a duplex stainless steel. Residual stresses and the presence of strain-induced martensite are studied as functions of the rake angle. Residual stresses of surface and sub-surface layers were determined by the use of the X-ray diffraction and hole-drilling techniques. X-ray diffraction enables us to distinguish between residual stresses in each phase separately, which is not possible when the hole-drilling method is applied. Furthermore, alterations in the near surface region are also analysed by the use of the magnetic Barkhausen noise and metallographic observation.

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Complex magnetic and microstructural investigation of duplex stainless steel

Cited by 36 publications

References 8 publications

Magnetic detection of sigma phase in duplex stainless steel UNS S31803

Magnetic detection of sigma phase in duplex stainless steel UNS S31803

Magnetic Investigations of Steel Degradation Using a Magnetic Hysteresis Scaling Technique

Surface Integrity after Turning a Duplex Stainless Steel with Respect to Tool Geometry

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