Irradiation hardening and ductility loss of Eurofer97 steel variants after neutron irradiation to ITER-TBM relevant conditions

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Irradiation hardening and ductility loss of Eurofer97 steel variants after neutron irradiation to ITER-TBM relevant conditions. / Bhattacharya, Arunodaya; Xiang, Chen; Graening, Tim; Geringer, Josina W.; Reed, Jordan; Pilloni, Luciano; Terentyev, Dmitry; Puype, Athina; Byun, Thak Sang; Katoh, Yutai; Rieth, Michael; Zinkle, Steve J.

In: Fusion Engineering & Design, 12.11.2021, p. 1-22.

Research output: Contribution to journalArticlepeer-review

Harvard

Bhattacharya, A, Xiang, C, Graening, T, Geringer, JW, Reed, J, Pilloni, L, Terentyev, D, Puype, A, Byun, TS, Katoh, Y, Rieth, M & Zinkle, SJ 2021, 'Irradiation hardening and ductility loss of Eurofer97 steel variants after neutron irradiation to ITER-TBM relevant conditions', Fusion Engineering & Design, pp. 1-22. https://doi.org/10.1016/j.fusengdes.2021.112935

APA

Bhattacharya, A., Xiang, C., Graening, T., Geringer, J. W., Reed, J., Pilloni, L., Terentyev, D., Puype, A., Byun, T. S., Katoh, Y., Rieth, M., & Zinkle, S. J. (2021). Irradiation hardening and ductility loss of Eurofer97 steel variants after neutron irradiation to ITER-TBM relevant conditions. Fusion Engineering & Design, 1-22. [112935]. https://doi.org/10.1016/j.fusengdes.2021.112935

Vancouver

Bhattacharya A, Xiang C, Graening T, Geringer JW, Reed J, Pilloni L et al. Irradiation hardening and ductility loss of Eurofer97 steel variants after neutron irradiation to ITER-TBM relevant conditions. Fusion Engineering & Design. 2021 Nov 12;1-22. 112935. https://doi.org/10.1016/j.fusengdes.2021.112935

Author

Bhattacharya, Arunodaya ; Xiang, Chen ; Graening, Tim ; Geringer, Josina W. ; Reed, Jordan ; Pilloni, Luciano ; Terentyev, Dmitry ; Puype, Athina ; Byun, Thak Sang ; Katoh, Yutai ; Rieth, Michael ; Zinkle, Steve J. / Irradiation hardening and ductility loss of Eurofer97 steel variants after neutron irradiation to ITER-TBM relevant conditions. In: Fusion Engineering & Design. 2021 ; pp. 1-22.

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@article{074f1339c6224a359f670c6c6f22c7b6,
title = "Irradiation hardening and ductility loss of Eurofer97 steel variants after neutron irradiation to ITER-TBM relevant conditions",
abstract = "Ten Eurofer97 steel variants, produced by non-standard fabrication-processing routes and modified alloying chemistries, were studied by neutron irradiations in the high flux isotope reactor. The irradiations were performed to ITER-TBM relevant conditions of ~255–350 .C, 2.94–3.24 dpa. We quantified the irradiation-induced degradation of the steels using mechanical property tests. All the steels suffered from irradiation hardening, where a significant increase in Vickers microhardness and yield stress (sYS) occurred, accompanied with severe loss of tensile elongation. The extent of hardening was material dependent. For Tirr = 300±30 .C, most steels showed sYS increase in the range of ~30% to as high as ~66%, except for a low temperature tempered steel with sYS increase below 15%. Despite large losses in elongation, most failures were ductile. Significant post-necking ductility was retained with reduction in area (RA) between 65–75%, but <50% for low temperature tempered steels. The ultimate tensile stress to yield stress (sUTS/sYS) ratios decreased significantly after irradiation, highlighting irradiation-induced strain hardening capacity reduction. No major effect of irradiation on the plastic instability stress (sPIS) and true fracture stress of the steels was observed. By comparing the tensile stresses in true stress units and with literature, the results suggest that RAFM steel designing should target materials with a large separation between sPIS and sYS, to ensure the materials can maintain large work hardening and uniform deformation capability after irradiation. The tensile data of the steels additionally revealed a compelling evidence of an inverse trend between the change in RA and increase in sYS of the neutron irradiated Eurofer97 type steels.",
keywords = "Eurofer97 steel, Neutron irradiation, Tensile properties, Irradiation-hardening, Fracture, Reduction in area",
author = "Arunodaya Bhattacharya and Chen Xiang and Tim Graening and Geringer, {Josina W.} and Jordan Reed and Luciano Pilloni and Dmitry Terentyev and Athina Puype and Byun, {Thak Sang} and Yutai Katoh and Michael Rieth and Zinkle, {Steve J.}",
note = "Score=10",
year = "2021",
month = nov,
day = "12",
doi = "10.1016/j.fusengdes.2021.112935",
language = "English",
pages = "1--22",
journal = "Fusion Engineering & Design",
issn = "0920-3796",
publisher = "Elsevier",

}

RIS - Download

TY - JOUR

T1 - Irradiation hardening and ductility loss of Eurofer97 steel variants after neutron irradiation to ITER-TBM relevant conditions

AU - Bhattacharya, Arunodaya

AU - Xiang, Chen

AU - Graening, Tim

AU - Geringer, Josina W.

AU - Reed, Jordan

AU - Pilloni, Luciano

AU - Terentyev, Dmitry

AU - Puype, Athina

AU - Byun, Thak Sang

AU - Katoh, Yutai

AU - Rieth, Michael

AU - Zinkle, Steve J.

N1 - Score=10

PY - 2021/11/12

Y1 - 2021/11/12

N2 - Ten Eurofer97 steel variants, produced by non-standard fabrication-processing routes and modified alloying chemistries, were studied by neutron irradiations in the high flux isotope reactor. The irradiations were performed to ITER-TBM relevant conditions of ~255–350 .C, 2.94–3.24 dpa. We quantified the irradiation-induced degradation of the steels using mechanical property tests. All the steels suffered from irradiation hardening, where a significant increase in Vickers microhardness and yield stress (sYS) occurred, accompanied with severe loss of tensile elongation. The extent of hardening was material dependent. For Tirr = 300±30 .C, most steels showed sYS increase in the range of ~30% to as high as ~66%, except for a low temperature tempered steel with sYS increase below 15%. Despite large losses in elongation, most failures were ductile. Significant post-necking ductility was retained with reduction in area (RA) between 65–75%, but <50% for low temperature tempered steels. The ultimate tensile stress to yield stress (sUTS/sYS) ratios decreased significantly after irradiation, highlighting irradiation-induced strain hardening capacity reduction. No major effect of irradiation on the plastic instability stress (sPIS) and true fracture stress of the steels was observed. By comparing the tensile stresses in true stress units and with literature, the results suggest that RAFM steel designing should target materials with a large separation between sPIS and sYS, to ensure the materials can maintain large work hardening and uniform deformation capability after irradiation. The tensile data of the steels additionally revealed a compelling evidence of an inverse trend between the change in RA and increase in sYS of the neutron irradiated Eurofer97 type steels.

AB - Ten Eurofer97 steel variants, produced by non-standard fabrication-processing routes and modified alloying chemistries, were studied by neutron irradiations in the high flux isotope reactor. The irradiations were performed to ITER-TBM relevant conditions of ~255–350 .C, 2.94–3.24 dpa. We quantified the irradiation-induced degradation of the steels using mechanical property tests. All the steels suffered from irradiation hardening, where a significant increase in Vickers microhardness and yield stress (sYS) occurred, accompanied with severe loss of tensile elongation. The extent of hardening was material dependent. For Tirr = 300±30 .C, most steels showed sYS increase in the range of ~30% to as high as ~66%, except for a low temperature tempered steel with sYS increase below 15%. Despite large losses in elongation, most failures were ductile. Significant post-necking ductility was retained with reduction in area (RA) between 65–75%, but <50% for low temperature tempered steels. The ultimate tensile stress to yield stress (sUTS/sYS) ratios decreased significantly after irradiation, highlighting irradiation-induced strain hardening capacity reduction. No major effect of irradiation on the plastic instability stress (sPIS) and true fracture stress of the steels was observed. By comparing the tensile stresses in true stress units and with literature, the results suggest that RAFM steel designing should target materials with a large separation between sPIS and sYS, to ensure the materials can maintain large work hardening and uniform deformation capability after irradiation. The tensile data of the steels additionally revealed a compelling evidence of an inverse trend between the change in RA and increase in sYS of the neutron irradiated Eurofer97 type steels.

KW - Eurofer97 steel

KW - Neutron irradiation

KW - Tensile properties

KW - Irradiation-hardening

KW - Fracture

KW - Reduction in area

UR - https://ecm.sckcen.be/OTCS/llisapi.dll/open/46454459

U2 - 10.1016/j.fusengdes.2021.112935

DO - 10.1016/j.fusengdes.2021.112935

M3 - Article

SP - 1

EP - 22

JO - Fusion Engineering & Design

JF - Fusion Engineering & Design

SN - 0920-3796

M1 - 112935

ER -

ID: 7290486