... Abstract It is well known that direct application of fracture toughness values measured from standard laboratory specimens to structural components without matching constraint conditions may lead to over-conservative results for structural integrity assessment. In some cases, this may lead...

... range of yield stress and T o values for reactor pressure vessel steels. reactor pressure vessel steels fracture toughness master curve method miniature C(T) specimens Proceedings of the ASME 2022 Pressure Vessels & Piping Conference PVP2022 July 17-22, 2022, Las Vegas, Nevada, USA PVP2022...

.... The WPS effect on fracture toughness (FT) was evaluated using the ratio of enhanced FT KFrac (at re-load, after WPS) to FT of virgin material K IC (without pre-load), as obtained from the experimental data. It was shown, that relatively to the K IC,50% and K IC,95% , the WPS effect led to an increase...

... depend on an amalgam of Code and regulatory documents. This diminishes the clarity with which safety margins are addressed and inhibits adoption of new technologies for fracture toughness and embrittlement characterization. During the February 2019 ASME Code week, the Section XI Working Group...

... to wider use of Master Curve/ T o -based methods is the need to perform fracture toughness ( K Jc ) tests using often limited supplies of irradiated or archive materials to determine T o . While recent advances in testing technology permit the use of “mini” compact tension specimens, four of which can...

... Abstract In the 1990’s, the Heavy Section Steel Irradiation Program at the ORNL performed investigation of the shape of the fracture toughness master curve for reactor pressure vessel steel highly embrittled because of irradiation exposure. A radiation-sensitive reactor pressure vessel (RPV...

... Abstract A companion paper presented at this conference summarizes a recently published EPRI report that provides a Technical Basis for Code Case N-914, “Accounting for the Effect of Embrittlement on Fracture Toughness Properties Used in Evaluations of Pressure Boundary Materials in Class 1...

... of the K Jc MC into the ASME Code. The CC used the 5 th percentile lower bound of the Wallin Master Curve as an alternative to the ASME K Ic curve to characterize material resistance to fracture in flow evaluations. To take advantage of the best-estimate fracture toughness models developed over the last...

... Abstract The H2020 FRACTESUS project is aimed at the validation of miniaturized compact tension (MCT) specimen. More specifically the usage of the MCT with the Master Curve (MC) oriented fracture toughness testing of reactor pressure vessel (RPV) materials in hot cell conditions...

... Abstract The Master Curve fracture toughness evaluation method standardized by ASTM E1921 and JEAC4216 specifies the acceptable test temperature (T) to be selected within the range of ±50°C from evaluated reference temperature, T o . If small size specimens, such as 4mm thickness Mini-C(T...

... Abstract EUROFER97 and F82H are two leading reduced-activation ferritic-martensitic (RAFM) steels for fusion blanket applications. Exposure to the harsh environment of fusion reactors can result in severe degradation of materials fracture toughness (FT). Thus, the post-irradiation evaluation...

... Abstract This paper proposes a simple method to predict the fracture toughness of hydrogen-embrittled material using a hydrogen-embrittlement constant. The effect of hydrogen-embrittlement on fracture strain can be quantified via hydrogen-embrittlement constant, and it can be obtained...

... of fracture toughness of pipeline steel in engineering, the feasibility of Charpy impact testing is investigated. In this paper, the test method of pipe fracture toughness based on instrumented Charpy impact test is investigated in detail, taking X80 pipeline steel as an example, and its fracture mode...

... are prone to defects. Therefore, it is important to determine the fracture toughness of the materials. In this work, fracture toughness tests on single edge notched bend (SENB) samples have been performed and the results are presented. The samples have been manufactured in 3 orthogonal directions enabling...

... Abstract FeCrAl alloys are promising candidate materials for the accident tolerant fuel (ATF) cladding application due to their exceptional resistance to oxidation in elevated temperature steam environments. Currently, limited fracture toughness data are available for the FeCrAl alloys...

... conservative approaches. A recent test program was undertaken to evaluate the fracture toughness properties of the weld heat-affected zone (HAZ) of an ex-service steel in mildly acidic sour water environments more typical of the downstream refining industry. The results of the test program, including the test...

... including fracture toughness testing in NACE A or NACE B solutions [3]. NACE A and B solutions are significantly more aggressive solutions (lower pH and higher Hydrogen Sulfide [H 2 S] concentration) than most common refinery sour waters. Due to the severity of the testing solution, the results are likely...

... Abstract The H2020 project entitled “Fracture mechanics testing of irradiated RPV steels by means of sub-sized specimens (FRACTESUS)” started on the 1 st October 2020. The aim of this project is to demonstrate the applicability of miniaturized compact tension specimens in fracture toughness...

... Abstract In the structural integrity assessment of a reactor pressure vessel (RPV), the fracture toughness (K Jc ) should be higher than the stress intensity factor at the crack tip of a semi-elliptical shaped under-clad crack (UCC), which is prescribed in JEAC4206-2016. However, differences...

.... 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 T 0...