Characterization of Deformation by Cold Rolling in Ferritic Steel Containing Cu Particles Using Neutron Transmission Analysis

Oba, Yojiro; Morooka, Shigenori; Ohishi, Kazuki; Suzuki, Jun–ichi; Tsuchiyama, Toshihiro

doi:10.2355/isijinternational.isijint-2021-144

Cited by 5 publications

(2 citation statements)

References 33 publications

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“…Small-angle neutron scattering (SANS) measurements were conducted using the TAIKAN small-and wide-angle neutron scattering instrument installed at the pulsed neutron source of J-PARC. 14,15) Neutrons with a wavelength between 0.45 and 1.4 nm were used. A magnetic field of 1 T, which is enough to saturate the magnetization of general steels, was applied using an electromagnet to separate the magnetic scattering from the nuclear scattering in SANS.…”

Section: Methodsmentioning

confidence: 99%

Change in Mechanical Properties of High-Strength Martensitic Steel by the Combination of Pre-strain and Deformation Temperature

Tsuchida,

Kuramoto,

Ueji

et al. 2024

ISIJ Int.

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The effects of pre-strain on the mechanical properties of high-strength martensitic steels were investigated using either strain tempering (ST) or quenching and tempering (QT) samples. In the tensile tests at deformation temperatures between 296 and 573 K, the ST sample exhibited an increase in both the tensile strength (TS) and uniform elongation (U.El) at 473 to 523 K, whereas the QT sample showed an increase in U.El with little change in the TS and yield strength (YS). The results of in situ neutron diffraction experiments revealed an increase in the stress partitioning to the bcc phase with an increase in the deformation temperature from 296 to 523 K. The difference in the phase stress between the bcc and cementite phases decreased with an increase in the temperature due to the decrease in the cementite strength. Pre-strain of 0.5% increased the YS at 296 K with a slight work hardening; the initial dislocation density (ρ) decreased at 523 K, but increased significantly after yielding, leading to a better combination of TS and U.El. The combination of pre-strain, tempering, and deformation temperatures caused the change in ρ before deformation and the increase in ρ after yielding of the martensitic steel.

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Section: Methodsmentioning

confidence: 99%

Change in Mechanical Properties of High-Strength Martensitic Steel by the Combination of Pre-strain and Deformation Temperature

Tsuchida,

Kuramoto,

Ueji

et al. 2024

ISIJ Int.

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“…Background contributions including dark current noise and scattered neutrons from environment was ignored similar to previous work using the µ NID 38 . The uncertainties of neutron intensities were estimated based on the Poisson distribution, which provides that both the mean and variance are equal to the measured neutron counts and commonly used in the neutron scattering experiments and transmission analyses 39 – 42 . The standard errors of the neutron transmission were evaluated from the uncertainties of the neutron intensities based on the law of propagation.…”

Section: Methodsmentioning

confidence: 99%

Neutron resonance absorption imaging of simulated high-level radioactive waste in borosilicate glass

Oba

Motokawa

Kaneko

et al. 2023

Sci Rep

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We performed a preliminary study of neutron resonance absorption imaging to investigate the spatial distribution of constituent elements in borosilicate glasses containing simulated high-level radioactive waste, in which elemental inhomogeneities affect the physical and chemical stabilities of the glass. Dips generated by the resonance absorptions of Rh, Pd, Na, Gd, Cs, and Sm were observed in the neutron transmission spectra of the glass samples. The spatial distributions of these elements were obtained from the neutron transmission images at the resonance energies. The distributions of Rh and Pd visualized the sedimentation of these platinum group elements. In contrast, the lanthanides (Gd and Sm) and Cs were uniformly dispersed. These results show that neutron resonance absorption imaging is a promising tool for characterizing borosilicate glasses and investigating the vitrification mechanism of high-level radioactive waste.

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Polarized neutron transmission spectroscopy on an ultrafine grained steel

Mamiya,

Oba,

Terada

et al. 2023

2023 IEEE International Magnetic Conference - Short Papers (INTERMAG Short Papers)

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Characterization of Deformation by Cold Rolling in Ferritic Steel Containing Cu Particles Using Neutron Transmission Analysis

Cited by 5 publications

References 33 publications

Change in Mechanical Properties of High-Strength Martensitic Steel by the Combination of Pre-strain and Deformation Temperature

Change in Mechanical Properties of High-Strength Martensitic Steel by the Combination of Pre-strain and Deformation Temperature

Neutron resonance absorption imaging of simulated high-level radioactive waste in borosilicate glass

Polarized neutron transmission spectroscopy on an ultrafine grained steel

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