TY - GEN
T1 - Determination of eurofer97 fracture toughness by testing small C(T) specimens
AU - Andres, David
AU - Serrano, Marta
AU - Hernandez, Rebeca
AU - Wang, Yiqiang
AU - Richardson, Mark
N1 - Publisher Copyright:
© 2021 by ASME.
PY - 2021
Y1 - 2021
N2 - The use of small specimen test techniques (SSTT) to determine the mechanical properties of irradiated materials has been studied over the past decades both in fission and fusion programs, but also to characterise and optimise new materials by nuclear and non-nuclear communities. Currently a number of activities are running that focus on the standardisation of SSTT to determine fracture toughness properties for fusion reactor materials (IAEA [1], EUROfusion [2], F4E [3]), and to support the long-term operation of light-water reactors (CRIEPI [4]). The determination of the T0 reference temperature (ASTM E1921 [5]) has been successfully achieved by testing small compact tension (C(T)) specimens (W=8mm, B=4mm) of non-irradiated and irradiated pressure vessel materials. However, some concerns exist regarding the use of the Master Curve (MC) on ferritic-martensitic steels, not only with SSTT but also with standard specimens. The main concern is the slope of the MC [6, 7], that seems to be steeper than the standard one. In this paper, the fracture toughness of Eurofer97 has been obtained by testing small C(T) specimens with the geometry selected in IFMIFDONES (W=9.2mm, B=4.6mm) in the transition region. T0 has been determined and compared to the one obtained from 0.5TC( T) specimens (both normalised to 1T). The scatter of the results has also been assessed to validate the scatter description of the MC.
AB - The use of small specimen test techniques (SSTT) to determine the mechanical properties of irradiated materials has been studied over the past decades both in fission and fusion programs, but also to characterise and optimise new materials by nuclear and non-nuclear communities. Currently a number of activities are running that focus on the standardisation of SSTT to determine fracture toughness properties for fusion reactor materials (IAEA [1], EUROfusion [2], F4E [3]), and to support the long-term operation of light-water reactors (CRIEPI [4]). The determination of the T0 reference temperature (ASTM E1921 [5]) has been successfully achieved by testing small compact tension (C(T)) specimens (W=8mm, B=4mm) of non-irradiated and irradiated pressure vessel materials. However, some concerns exist regarding the use of the Master Curve (MC) on ferritic-martensitic steels, not only with SSTT but also with standard specimens. The main concern is the slope of the MC [6, 7], that seems to be steeper than the standard one. In this paper, the fracture toughness of Eurofer97 has been obtained by testing small C(T) specimens with the geometry selected in IFMIFDONES (W=9.2mm, B=4.6mm) in the transition region. T0 has been determined and compared to the one obtained from 0.5TC( T) specimens (both normalised to 1T). The scatter of the results has also been assessed to validate the scatter description of the MC.
KW - Eurofer97
KW - Fracture Toughness
KW - Fusion
KW - Master Curve
KW - Small Specimen Testing Technique
UR - https://www.scopus.com/pages/publications/85117958469
U2 - 10.1115/PVP2021-62040
DO - 10.1115/PVP2021-62040
M3 - Conference contribution
AN - SCOPUS:85117958469
T3 - American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
BT - Codes and Standards
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 2021 Pressure Vessels and Piping Conference, PVP 2021
Y2 - 13 July 2021 through 15 July 2021
ER -
