The small angle neutron spectrometer at the HANARO reactor, Korea

Seong, Baek-Seok; Han, Young‐Soo; Lee, C.-H.; Lee, J.-S.; Hong, Kwangpyo; Park, K.-N.; Kim, H.-J.

doi:10.1007/s003390101091

Cited by 13 publications

(5 citation statements)

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“…SANS experiments were also performed to characterize nano-precipitates in the steels at room temperature at the HANARO Cold Neutron facility [ 24 ] which is equipped with a two-dimensional position sensitive detector. Flat samples with the dimensions of 5 × 2.2 × 1.5 mm were placed between the two electric magnetic poles, where the external magnetic field (1.0 T) was applied horizontally, parallel to the sample surface, and perpendicular to the incident neutron beam.…”

Section: Methodsmentioning

confidence: 99%

Understanding dual precipitation strengthening in ultra-high strength low carbon steel containing nano-sized copper precipitates and carbides

et al. 2017

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Low carbon ferritic steel alloyed with Ti, Mo and Cu was hot rolled and interrupt cooled to produce nano-sized precipitates of copper and (Ti,Mo)C carbides. The steel had a tensile strength of 840 MPa, an increase in yield strength of 380 MPa over that of the plain carbon steel and reasonable ductility. Transmission electron microscopy and small angle neutron scattering were used to characterize size and volume fraction of the precipitates in the steels designed to form only copper precipitates and only (Ti,Mo)C carbides. The individual and combined precipitation strengthening contributions was calculated using the size and volume fraction of precipitates and compared with the measured values.Electronic supplementary materialThe online version of this article (doi:10.1186/s40580-017-0110-5) contains supplementary material, which is available to authorized users.

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Section: Methodsmentioning

confidence: 99%

Understanding dual precipitation strengthening in ultra-high strength low carbon steel containing nano-sized copper precipitates and carbides

et al. 2017

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“…The SANS experiments with a magnetic field of 1.0 Tesla were performed the HANARO Reactor [10]. The wavelength (λ) used was 0.508 nm, the sample-to-detector distance was 3.0 m and the wavelength spread ( λ/λ) was about 12%.…”

Section: Methodsmentioning

confidence: 99%

“…Two-dimensional scattering patterns collected by the two-dimensional area detectors with an active area of 64.5 × 64.5 cm 2 were averaged to produce a one-dimensional intensity profile. Calibration to absolute SANS cross section was obtained by measurement of standard porous silica in a 1 mm path-length quartz cell [10]. The data were treated by ILL standard programs [11].…”

Section: Methodsmentioning

confidence: 99%

Quantitative analysis of fine nano-sized precipitates in low-carbon steels by small angle neutron scattering

et al. 2010

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The small angle neutron scattering (SANS) technique was used to determine the nano-sized precipitates in interstitial free (IF) and low-carbon (LC) steels with a hot-rolling temperature. The real-space direct model fitting method was applied to quantitatively analyze the SANS data. The magnetic and chemical properties of precipitates in the samples were also investigated by separation and comparison of nuclear and magnetic SANS scattering data. The size distribution of precipitates in the IF steel is in good agreement with the microstructure observation using transmission electron microscopy. The results revealed that the IF steel had two types of non-magnetic precipitates, Ti 4 C 2 S 2 and TiC, with the average size of about 30 nm in diameter and little difference in chemical composition. In case of commercial LC steel, the fine and large precipitates are identified as MnS and Fe 3 C, respectively. The average size of spherical MnS precipitates was about 4.8 nm in radius and the distribution is isotropic. It is likely that the LC steels have almost the same composition and a similar size as precipitates such as MnS and Fe 3 C with different fin-

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“…The RPV steel was irradiated in the HANARO reactor at KAERI with a fluence of 2.5x10 19 n/cm 2 at 290 o C. This RPV steel is used at the YeongKwang nuclear power plant. The small angle neutron scattering experiments were performed at the SANS instrument in the HANARO reactor at KAERI [5]. The experimental set-ups included a wavelength of 4.31Å with a wavelength spread(FWHM) of 12% and the sample to detector distance of 2m from the SANS instrument at KAERI.…”

Section: Methodsmentioning

confidence: 99%

Nondestructive SANS Study of Reactor Pressure Vessel Steel after Irradiation

Han

Shin²,

Seong

et al. 2006

KEM

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The irradiation induced defects of irradiated reactor pressure vessel(RPV) steel were investigated by a small angle neutron scattering. The degradation of the mechanical properties of RPV steels during an irradiation in a nuclear power plant is closely related to the irradiation induced defects. The size of these defects is known to be a few nanometers, and the small angle neutron scattering technique is regarded as the best non destructive technique to characterize the nano sized inhomogeneities in bulk samples. The RPV steel was irradiated in the HANARO reactor in KAERI. The small angle neutron scattering experiments were performed at SANS instrument in the HANARO reactor. Both unirradiated and irradiated RPV steels were measured and the SANS data of both steels were compared. The nano sized irradiation induced defects were quantitatively analyzed by SANS. The type of defects was also analyzed based on the SANS results, and the effect of the chemical composition of the RPV steel on the irradiation induced defects was discussed.

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The small angle neutron spectrometer at the HANARO reactor, Korea

Cited by 13 publications

References 0 publications

Understanding dual precipitation strengthening in ultra-high strength low carbon steel containing nano-sized copper precipitates and carbides

Understanding dual precipitation strengthening in ultra-high strength low carbon steel containing nano-sized copper precipitates and carbides

Quantitative analysis of fine nano-sized precipitates in low-carbon steels by small angle neutron scattering

Nondestructive SANS Study of Reactor Pressure Vessel Steel after Irradiation

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