Master curve characterization of the fracture toughness in unirradiated and irradiated RPV steels using full- and 1/3-size pre-cracked Charpy specimens

B. S. Lee; J. H. Hong; W. J. Yang; M. Y. Huh; S. H. Chi

doi:10.1016/S0308-0161(00)00032-6

Master curve characterization of the fracture toughness in unirradiated and irradiated RPV steels using full- and 1/3-size pre-cracked Charpy specimens

B. S. Lee, J. H. Hong, W. J. Yang, M. Y. Huh, S. H. Chi

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

Abstract

Cleavage initiation fracture toughness (K(JC)) tests have been performed with full-size (10 x 10 x 55 mm³) and 1/3-size (3.3 x 3.3 x 18.3 mm³) pre-cracked Charpy (PCVN) specimens in the transition temperature region. IAEA reference reactor pressure vessel (RPV) steels, JRQ and JFL, and Korean SA508-3 forging steels were used in this study. Some specimens were irradiated to a neutron fluence of 4.5 x 10¹⁹ n/cm² (E > 1 MeV) at 288°C. For the JRQ steel, the transition temperature shift (ΔT₀) due to neutron irradiation is about 134°C from PCVN testing, which is greater than ΔT(41J) from the conventional Charpy impact testing. However, in a modern RPV steel, the transition temperature shift was almost negligible. The reference temperature T₀ values showed some dependence on the test temperature and specimen geometry, while the median and probabilistic bound lines of the Master Curve well described the population of the measured fracture toughness data. In general, the deviation of the measured T₀ values from different test conditions was about 10-15°C. Compared with the full-size PCVN data, the 1/3-size PCVN specimens may also give a reasonable result if the test conditions are adequately selected. (C) 2000 Elsevier Science Ltd. All rights reserved.

Original language	English
Pages (from-to)	599-604
Number of pages	6
Journal	International Journal of Pressure Vessels and Piping
Volume	77
Issue number	10
DOIs	https://doi.org/10.1016/S0308-0161(00)00032-6
Publication status	Published - 2000 Aug

Bibliographical note

Funding Information:
This work has been carried out as a part of the Reactor Pressure Boundary Materials Project under the Nuclear R&D Program by MOST in Korea. The irradiation of the specimens was performed in NRI, Czech Rep., under a co-operation contract, and we acknowledge Dr Milan Brumovsky. The authors are also very grateful to Mr Sang-Bok Ahn, Mr Yong-Seon Choo, and Ms Sook-Hyang Song for their technical support for this study.

Keywords

Fracture toughness
Irradiation embrittlement
Master Curve
One-third sized charpy specimen
PCVN
RPV steel
Small specimen test technique

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

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10.1016/S0308-0161(00)00032-6

Cite this

@article{cfc2e2d378b1455b802e651a5c3f32f2,

title = "Master curve characterization of the fracture toughness in unirradiated and irradiated RPV steels using full- and 1/3-size pre-cracked Charpy specimens",

abstract = "Cleavage initiation fracture toughness (K(JC)) tests have been performed with full-size (10 x 10 x 55 mm3) and 1/3-size (3.3 x 3.3 x 18.3 mm3) pre-cracked Charpy (PCVN) specimens in the transition temperature region. IAEA reference reactor pressure vessel (RPV) steels, JRQ and JFL, and Korean SA508-3 forging steels were used in this study. Some specimens were irradiated to a neutron fluence of 4.5 x 1019 n/cm2 (E > 1 MeV) at 288°C. For the JRQ steel, the transition temperature shift (ΔT0) due to neutron irradiation is about 134°C from PCVN testing, which is greater than ΔT(41J) from the conventional Charpy impact testing. However, in a modern RPV steel, the transition temperature shift was almost negligible. The reference temperature T0 values showed some dependence on the test temperature and specimen geometry, while the median and probabilistic bound lines of the Master Curve well described the population of the measured fracture toughness data. In general, the deviation of the measured T0 values from different test conditions was about 10-15°C. Compared with the full-size PCVN data, the 1/3-size PCVN specimens may also give a reasonable result if the test conditions are adequately selected. (C) 2000 Elsevier Science Ltd. All rights reserved.",

keywords = "Fracture toughness, Irradiation embrittlement, Master Curve, One-third sized charpy specimen, PCVN, RPV steel, Small specimen test technique",

author = "Lee, {B. S.} and Hong, {J. H.} and Yang, {W. J.} and Huh, {M. Y.} and Chi, {S. H.}",

note = "Funding Information: This work has been carried out as a part of the Reactor Pressure Boundary Materials Project under the Nuclear R&D Program by MOST in Korea. The irradiation of the specimens was performed in NRI, Czech Rep., under a co-operation contract, and we acknowledge Dr Milan Brumovsky. The authors are also very grateful to Mr Sang-Bok Ahn, Mr Yong-Seon Choo, and Ms Sook-Hyang Song for their technical support for this study.",

year = "2000",

month = aug,

doi = "10.1016/S0308-0161(00)00032-6",

language = "English",

volume = "77",

pages = "599--604",

journal = "International Journal of Pressure Vessels and Piping",

issn = "0308-0161",

publisher = "Elsevier B.V.",

number = "10",

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TY - JOUR

T1 - Master curve characterization of the fracture toughness in unirradiated and irradiated RPV steels using full- and 1/3-size pre-cracked Charpy specimens

AU - Lee, B. S.

AU - Hong, J. H.

AU - Yang, W. J.

AU - Huh, M. Y.

AU - Chi, S. H.

N1 - Funding Information: This work has been carried out as a part of the Reactor Pressure Boundary Materials Project under the Nuclear R&D Program by MOST in Korea. The irradiation of the specimens was performed in NRI, Czech Rep., under a co-operation contract, and we acknowledge Dr Milan Brumovsky. The authors are also very grateful to Mr Sang-Bok Ahn, Mr Yong-Seon Choo, and Ms Sook-Hyang Song for their technical support for this study.

PY - 2000/8

Y1 - 2000/8

N2 - Cleavage initiation fracture toughness (K(JC)) tests have been performed with full-size (10 x 10 x 55 mm3) and 1/3-size (3.3 x 3.3 x 18.3 mm3) pre-cracked Charpy (PCVN) specimens in the transition temperature region. IAEA reference reactor pressure vessel (RPV) steels, JRQ and JFL, and Korean SA508-3 forging steels were used in this study. Some specimens were irradiated to a neutron fluence of 4.5 x 1019 n/cm2 (E > 1 MeV) at 288°C. For the JRQ steel, the transition temperature shift (ΔT0) due to neutron irradiation is about 134°C from PCVN testing, which is greater than ΔT(41J) from the conventional Charpy impact testing. However, in a modern RPV steel, the transition temperature shift was almost negligible. The reference temperature T0 values showed some dependence on the test temperature and specimen geometry, while the median and probabilistic bound lines of the Master Curve well described the population of the measured fracture toughness data. In general, the deviation of the measured T0 values from different test conditions was about 10-15°C. Compared with the full-size PCVN data, the 1/3-size PCVN specimens may also give a reasonable result if the test conditions are adequately selected. (C) 2000 Elsevier Science Ltd. All rights reserved.

AB - Cleavage initiation fracture toughness (K(JC)) tests have been performed with full-size (10 x 10 x 55 mm3) and 1/3-size (3.3 x 3.3 x 18.3 mm3) pre-cracked Charpy (PCVN) specimens in the transition temperature region. IAEA reference reactor pressure vessel (RPV) steels, JRQ and JFL, and Korean SA508-3 forging steels were used in this study. Some specimens were irradiated to a neutron fluence of 4.5 x 1019 n/cm2 (E > 1 MeV) at 288°C. For the JRQ steel, the transition temperature shift (ΔT0) due to neutron irradiation is about 134°C from PCVN testing, which is greater than ΔT(41J) from the conventional Charpy impact testing. However, in a modern RPV steel, the transition temperature shift was almost negligible. The reference temperature T0 values showed some dependence on the test temperature and specimen geometry, while the median and probabilistic bound lines of the Master Curve well described the population of the measured fracture toughness data. In general, the deviation of the measured T0 values from different test conditions was about 10-15°C. Compared with the full-size PCVN data, the 1/3-size PCVN specimens may also give a reasonable result if the test conditions are adequately selected. (C) 2000 Elsevier Science Ltd. All rights reserved.

KW - Fracture toughness

KW - Irradiation embrittlement

KW - Master Curve

KW - One-third sized charpy specimen

KW - PCVN

KW - RPV steel

KW - Small specimen test technique

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DO - 10.1016/S0308-0161(00)00032-6

M3 - Article

AN - SCOPUS:0034240805

SN - 0308-0161

VL - 77

SP - 599

EP - 604

JO - International Journal of Pressure Vessels and Piping

JF - International Journal of Pressure Vessels and Piping

IS - 10

ER -

Master curve characterization of the fracture toughness in unirradiated and irradiated RPV steels using full- and 1/3-size pre-cracked Charpy specimens

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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