Observation and Analysis of Nitrides in Steels Using the Non-aqueous Electrolyte-Potentiostatic Etching Method

Kurosawa, Fumio; Taguchi, Isamu; Tanino, Mitsuru; Matsumoto, Ryûtarô

doi:10.2320/jinstmet1952.45.1_63

Cited by 13 publications

(11 citation statements)

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“…from the electrolyte. 12) In fact, the amount of the extracted residues after the first-step filtering does not change after the second-step filtering in this study. To make sure, however, the two-steps filtering has been adopted to remove the precipitates thoroughly from the electrolyte.…”

Section: Icp Emission Spectrochemical Analysismentioning

confidence: 64%

Compositional Change of Refractory Elements in Solution during Aging in High Cr Heat Resistant Ferritic Steels.

et al. 2002

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Section: Icp Emission Spectrochemical Analysismentioning

confidence: 64%

Compositional Change of Refractory Elements in Solution during Aging in High Cr Heat Resistant Ferritic Steels.

et al. 2002

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“…Precipitated particles were extracted by electrolytic method in 10%-AA electrolytic solution 23) whose crystal structures were characterized by X-ray diffraction (XRD) method. The XRD measurements were performed by an X-ray powder diffractometer (RINT1500, RIGAKU) with Cu Kα radiation.…”

Section: Methodsmentioning

confidence: 99%

“…For the TEM observation, selective potentiostatic etching ( − 100 mV vs SCE) by electrolytic dissolution method 23) in 10%-AA electrolytic solution was performed on the mirrorpolished samples. Precipitated particles are picked up by the carbon extraction replica method (Ni mesh) for the TEM observation.. Chemical compositions of precipitates were analyzed by energy-dispersive X-ray spectroscopy (TEM-EDS).…”

Section: Methodsmentioning

confidence: 99%

“…Precipitated particles are picked up by the carbon extraction replica method (Ni mesh) for the TEM observation.. Chemical compositions of precipitates were analyzed by energy-dispersive X-ray spectroscopy (TEM-EDS). For the SEM observation, selective potentiostatic etching by electrolytic dissolution method 23) in 10%-AA electrolytic solution was performed on the mirror-polished samples.…”

Section: Methodsmentioning

confidence: 99%

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Precipitation Behavior of Copper Sulfides in Fe–Si–Cu–S Ferritic Steel

et al. 2016

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Precipitation behavior of copper sulfides in Fe-3.2%Si-0.4%Cu-0.02%S (mass%) ferritic steel was studied by X-ray diffraction (XRD), microstructure examination by transmission electron microscope (TEM) and scanning electron microscope (SEM). From the TEM results, it was found that FeS and cubic Cu 2-x S, precipitated in as-cast specimens. XRD peaks due to the cubic Cu 2-x S almost disappeared at 1 173 K. XRD peaks due to the hexagonal Cu 2-x S were identified in specimens annealed above 1 373 K. Assuming that the hexagonal Cu 2-x S is metastable in steel, which precipitates during cooling after dissolution of the stable cubic Cu 2-x S, it can be suggested that the cubic Cu 2-x S was dissolved at least 1 173 K. Results of thermodynamic calculations are consistent with this suggestion, which indicates that the dissolution temperature of the cubic Cu 2-x S is lower than those of other sulfides such as MnS and FeS in the ferritic steel.

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“…[7][8][9][10][11][12] One of the means to achieve this is to add Al to Fe-Cr type stainless steel and to heat in an oxidizing atmosphere such as in the air to form a stable alumina layer on the surface. [13][14][15][16][17][18][19][20][21] The surface alumina layer has a remarkable effect to control the formation of burrs at the blade edges. As this material is a usual ferrite type stainless steel, it has a very low hardness.…”

Section: Introductionmentioning

confidence: 99%

Softening by Coarsening of Ni-Al B<SUB>2</SUB> Phase Particles in Fe-Cr-Ni-Al-Zr Alloy

Imai¹,

Hamada²,

Uesugi

et al. 2008

Mater. Trans.

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In Fe-Cr-Ni-Al stainless steels, surface alumina layer with good adhesion is formed by heat treatment at a high temperature in oxidizing atmosphere and can prevent burrs from being formed in grinding of cutting edges. On the other hand, as the precipitation velocity of Ni-Al B 2 phase particles dispersed in the matrix of these steels is remarkably high, it is hard to obtain a full solid-solution condition without any fine precipitates by conventional solution treatment. And, the dispersed particles increase the hardness of the material and it is impossible to decrease the hardness sufficiently to form the cutting blade only by the annealing after cold rolling. According to the process developed in this study, most of the B 2 phase particles are dissolved once, cooled slowly and, thus, combined with remaining particles to form coarse particles. As a result, precipitation of fine particles is prevented and softening necessary to form into given shapes is achieved.

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Observation and Analysis of Nitrides in Steels Using the Non-aqueous Electrolyte-Potentiostatic Etching Method

Cited by 13 publications

References 0 publications

Compositional Change of Refractory Elements in Solution during Aging in High Cr Heat Resistant Ferritic Steels.

Compositional Change of Refractory Elements in Solution during Aging in High Cr Heat Resistant Ferritic Steels.

Precipitation Behavior of Copper Sulfides in Fe–Si–Cu–S Ferritic Steel

Softening by Coarsening of Ni-Al B<SUB>2</SUB> Phase Particles in Fe-Cr-Ni-Al-Zr Alloy

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