Effects of stress on radiation hardening and microstructural evolution in A533B steel

Fujii, K.; Fukuya, Koji; Kasada, Ryuta; Kimura, Akihiko; Ohkubo, T.

doi:10.1016/j.jnucmat.2010.09.055

Cited by 18 publications

(3 citation statements)

References 25 publications

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“…Data collected in the 1960s showed that the tensile stress had no effects or a suppressing effect on the transition temperature shift [42][43][44] For example, no effects for a stress of 75% yield strength were observed in A350 (0.08%Cu) and A302 (0.15%Cu) steels irradiated to (2-3) × 10 19 n/cm 2 [42], while the transition temperature shift was smaller for a tensile stress of 20% yield strength in A302B steels irradiated to 5 × 10 19 n/cm 2 [44]. In order to understand the mechanisms of stress effects, heavy ion irradiation experiments under stress were recently conducted on A533B steels [45,46]. The results showed that the tensile stress reduced radiation hardening and produced smaller solute clusters.…”

Section: Influences Of Irradiation Variablesmentioning

confidence: 99%

Current understanding of radiation-induced degradation in light water reactor structural materials

Fukuya¹

2013

Journal of Nuclear Science and Technology

161

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Current phenomenological knowledge and understanding of mechanisms are reviewed for radiation embrittlement of reactor pressure vessel low alloy steels and irradiation assisted stress corrosion cracking of core internals of stainless steels. Accumulated test data of irradiated materials in light water reactors and microscopic analyses by using state-of-the-art techniques such as a three-dimensional atom probe and electron backscatter diffraction have significantly increased knowledge about microstructural features. Characteristics of solute clusters and deformation microstructures and their contributions to macroscopic material property changes have been clarified to a large extent, which provide keys to understand in the degradation mechanisms. However, there are still fundamental research issues that merit study for long-term operation of reactors that requires reliable quantitative prediction of radiation-induced degradation of component materials in low-dose rate high-dose conditions.

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Section: Influences Of Irradiation Variablesmentioning

confidence: 99%

Current understanding of radiation-induced degradation in light water reactor structural materials

Fukuya¹

2013

Journal of Nuclear Science and Technology

161

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“…It is also known that the nucleation and growth processes for dislocation loops during neutron irradiation are strongly controlled by various factors, including the neutron flux, irradiation temperature, chemical composition, and applied stress [12,13]. On the other hand, the effects of dislocation loop formation on hardening are not clearly understood.…”

Section: Introductionmentioning

confidence: 99%

Hardening and microstructural evolution of A533b steels irradiated with Fe ions and electrons

Watanabe

Arase

Yamamoto

et al. 2016

Journal of Nuclear Materials

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“…More experimental data obtained by well-controlled irradiation at a specific dose rate and temperature are needed to understand the effects of dose rate change during irradiation on the microstructure change. Ion irradiation experiments are one of the best methods for carrying out a well-controlled irradiation, and they have been applied to the investigation of radiation embrittlement in previous studies [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Effects of dose rate change under irradiation on hardening and microstructural evolution in A533B steel

Fujii¹,

Fukuya²,

Hojo³

2013

Journal of Nuclear Science and Technology

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Iron-ion irradiations were carried out for 0.09wt%Cu A533B steel specimens at 2908C to investigate effects of dose rate change during irradiation; the irradiations consisted of the base irradiation (with an unchanged dose rate) and an additional one with changed dose rates from 1 to 50 times that of the base one. Nano-indentation hardness measurements showed that the increase in hardness was higher for lower dose rate of the base irradiation. A similar trend was identified during the additional irradiation. Transmission electron microscope (TEM) and three-dimensional atom probe (3DAP) analyses were carried out for the quantitative characterization of defect features. Mn/Ni/Si/Cu-enriched clusters and dislocation loops were observed in all specimens. The increase in hardness mainly depended on the formation of the solute atom clusters. The square root of the volume fraction of the solute atom clusters provided a good correlation with the increase in hardness. The effects of dose rate and dose rate change during irradiation were explained by the formation of solute atom clusters.

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Effects of stress on radiation hardening and microstructural evolution in A533B steel

Cited by 18 publications

References 25 publications

Current understanding of radiation-induced degradation in light water reactor structural materials

Current understanding of radiation-induced degradation in light water reactor structural materials

Hardening and microstructural evolution of A533b steels irradiated with Fe ions and electrons

Effects of dose rate change under irradiation on hardening and microstructural evolution in A533B steel

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