IAEA Coordinated Research Project on Master Curve approach to monitor fracture toughness of RPV steels: Effect of loading rate

Hans Werner Viehrig; Enrico Lucon

doi:10.1115/PVP2007-26087

IAEA Coordinated Research Project on Master Curve approach to monitor fracture toughness of RPV steels: Effect of loading rate

Hans Werner Viehrig, Enrico Lucon

Research output › peer-review

Abstract

In the final evaluation for the application of the Master Curve in the IAEA Coordinated Research Project Phase 5 (CRP-5), one of the areas which was identified as needing further work concerned the effects of loading rate on the reference temperature T0 up to impact loading conditions. This subject represents one of the three topic areas within the current CRP-8. The effect of loading rate can be broken down into two distinct aspects: 1) the effect of loading rate on the Master Curve T_o values for loading rates within the specified in ASTM E1921-05 for quasi-static loading (0.1 - 2 MPa√m/s); 2) the effect of loading rate on T_o values for higher loading rates, including impact conditions using instrumented precracked Charpy (PCC) specimens. The new CRP includes both aspects, but primarily focuses on the second element of loading rate effects, i.e. loading rates above 2 MPa√m/s. These issues are investigated within the topic area #2 of CRP-8 (Loading Rate Effect). The mandatory portion of this topic area required participation in a round-robin exercise (RRE) to validate the application of the Master Curve approach to PCC specimens tested in the ductile-to-brittle transition region using an instrumented pendulum (10 tests per participant on the JRQ material). The current status of the RRE is presented in [1]. The non-mandatory portion of this topic area consists in providing Master Curve data obtained at different loading rates on various RPV steels, in order to assess the loading rate dependence of T_o and compare it with an empirical modelproposed by Wallin. Moreover, additional topics will be addressed, such as: comparison of results from unloading compliance and monotonie loading in the quasi-static range; estimation of fracture toughness from Charpy V-notch data; assessment of crack arrest properties from instrumented Charpy results; effect of irradiation on the relationship between static and dynamic fracture toughness.

Original language	English
Title of host publication	2007 Proceedings of the ASME Pressure Vessels and Piping Conference
Subtitle of host publication	Operations, Applications and Components
Place of Publication	United States
Pages	187-192
Number of pages	6
DOIs	https://doi.org/10.1115/PVP2007-26087
State	Published - 2007
Event	2007 - ASME: Pressure Vessels and Piping Conference, PVP 2007 - ASME, San Antonio, TX Duration: 22 Jul 2007 → 26 Jul 2007

Publication series

Name	American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume	7
ISSN (Print)	0277-027X

Conference

Conference	2007 - ASME
Country/Territory	United States
City	San Antonio, TX
Period	2007-07-22 → 2007-07-26

ASJC Scopus subject areas

Mechanical Engineering

Access to Document

10.1115/PVP2007-26087License: Unspecified

Cite this

Viehrig, H. W., & Lucon, E. (2007). IAEA Coordinated Research Project on Master Curve approach to monitor fracture toughness of RPV steels: Effect of loading rate. In 2007 Proceedings of the ASME Pressure Vessels and Piping Conference: Operations, Applications and Components (pp. 187-192). (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP; Vol. 7).. https://doi.org/10.1115/PVP2007-26087

Viehrig, Hans Werner ; Lucon, Enrico. / IAEA Coordinated Research Project on Master Curve approach to monitor fracture toughness of RPV steels : Effect of loading rate. 2007 Proceedings of the ASME Pressure Vessels and Piping Conference: Operations, Applications and Components. United States, 2007. pp. 187-192 (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP).

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abstract = "In the final evaluation for the application of the Master Curve in the IAEA Coordinated Research Project Phase 5 (CRP-5), one of the areas which was identified as needing further work concerned the effects of loading rate on the reference temperature T0 up to impact loading conditions. This subject represents one of the three topic areas within the current CRP-8. The effect of loading rate can be broken down into two distinct aspects: 1) the effect of loading rate on the Master Curve To values for loading rates within the specified in ASTM E1921-05 for quasi-static loading (0.1 - 2 MPa√m/s); 2) the effect of loading rate on To values for higher loading rates, including impact conditions using instrumented precracked Charpy (PCC) specimens. The new CRP includes both aspects, but primarily focuses on the second element of loading rate effects, i.e. loading rates above 2 MPa√m/s. These issues are investigated within the topic area #2 of CRP-8 (Loading Rate Effect). The mandatory portion of this topic area required participation in a round-robin exercise (RRE) to validate the application of the Master Curve approach to PCC specimens tested in the ductile-to-brittle transition region using an instrumented pendulum (10 tests per participant on the JRQ material). The current status of the RRE is presented in [1]. The non-mandatory portion of this topic area consists in providing Master Curve data obtained at different loading rates on various RPV steels, in order to assess the loading rate dependence of To and compare it with an empirical modelproposed by Wallin. Moreover, additional topics will be addressed, such as: comparison of results from unloading compliance and monotonie loading in the quasi-static range; estimation of fracture toughness from Charpy V-notch data; assessment of crack arrest properties from instrumented Charpy results; effect of irradiation on the relationship between static and dynamic fracture toughness.",

keywords = "Master Curve, IAEA, RPV steels, loading rate",

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Viehrig, HW & Lucon, E 2007, IAEA Coordinated Research Project on Master Curve approach to monitor fracture toughness of RPV steels: Effect of loading rate. in 2007 Proceedings of the ASME Pressure Vessels and Piping Conference: Operations, Applications and Components. American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP, vol. 7, United States, pp. 187-192, 2007 - ASME, San Antonio, TX, United States, 2007-07-22. https://doi.org/10.1115/PVP2007-26087

IAEA Coordinated Research Project on Master Curve approach to monitor fracture toughness of RPV steels: Effect of loading rate. / Viehrig, Hans Werner; Lucon, Enrico.
2007 Proceedings of the ASME Pressure Vessels and Piping Conference: Operations, Applications and Components. United States, 2007. p. 187-192 (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP; Vol. 7).

Research output › peer-review

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Viehrig HW, Lucon E. IAEA Coordinated Research Project on Master Curve approach to monitor fracture toughness of RPV steels: Effect of loading rate. In 2007 Proceedings of the ASME Pressure Vessels and Piping Conference: Operations, Applications and Components. United States. 2007. p. 187-192. (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP). doi: 10.1115/PVP2007-26087