Results 1 to 10 of about 3,792 (227)
Revista de Metalurgia, 2020 La superaleación Rene®80 a base de Ni se utiliza para fabricar álabes de turbinas de gas en motores a reacción. La vida útil de algunas palas de turbina de motores a reacción está limitada por la fatiga de baja frecuencia y esta propiedad se ha visto ...
Mohammad Mehdi Barjesteh +3 more
doaj +5 more sources
Journal of Nuclear Materials, 2021 Abstract In order to analyze the irradiation-induced changes of ductile-to-brittle transition temperature (DBTT) of ferritic/martensitic (FM) steels, small punch (SP) tests were conducted on the specimens of Optifer-IX, Eurofer 97 and MA956 steels after irradiation in a target of the Swiss spallation neutron source (SINQ) at doses between 8.5 and 18 ...
C.F. Yao, Y. Dai
semanticscholar +3 more sources
Recent developments in small punch testing: Tensile properties and DBTT
Theoretical and Applied Fracture Mechanics, 2016 AbstractNeutron irradiation and temper embrittlement in nuclear power plants (NPPs) lead to microstructural changes in structural materials which induce a shift of the ductile to brittle transition temperature (DBTT) towards higher temperatures. Monitoring of the DBTT in NPP components receives therefore considerable attention — in particular in the ...
Bruchhausen, M. +6 more
semanticscholar +3 more sources
Procedia Structural Integrity, 2016 AbstractIn this paper, an engineering framework to transfer the lower bound fracture toughness between different temperatures in the ductile–to–brittle (DBTT) temperature region is proposed and validated for 0.55% carbon steel using 0.5TSE(B) specimens. The framework requires only stress–strain curve for different temperatures as experimental data. The
Meshii, Toshiyuki, Yamaguchi, Teruhiro
semanticscholar +6 more sources
DBTT Reduction Enabled by SiO2-Bearing Flux in Submerged Arc Welds
Welding JournalThe ductile-brittle transition temperature (DBTT) plays a critical role in determining the integrity of welded structures under common low-temperature service conditions. Fluxes are proven effective agents that significantly alter weld compositions and resulting microstructures.
CHAO HAN +4 more
semanticscholar +3 more sources
EFFECT OF THE PRECIPITATION OF Cu-RICH CLUSTERS ON THE DBTT OF RPV SIMULATED STEEL [PDF]
Acta Metallurgica Sinica, 2012 Reactor pressure vessels(RPVs) are usually made of low alloy ferritic steels,among which A508-Ⅲsteel is a typical one.The long-term neutron irradiation can induce the embrittlement of RPV steels,and the embrittlement may lead to a reduction of the RPV service life.Generally, this behavior of the embrittlement is well established and is typically ...
Gang XU +5 more
semanticscholar +3 more sources
TEM Observation of Dislocation Emission from a Crack at DBTT in Si
MATERIALS TRANSACTIONS, 2001 Emission of dislocations from a crack which propagated at the ductile-brittle transition temperature (DBTT) in Si was observed by combined use of focused-ion beam (FIB) technique and transmission electron microscopy (TEM). At the wake of a DBTT crack many dislocation lines and dislocation loops were observed, while a wake of a precrack introduced at ...
null Suprijadi, Hiroyasu Saka
semanticscholar +4 more sources
Modelling of the Charpy Impact Test in the DBTT Range
Materials Science Forum, 2005 The finite element method was used in order to compute the energy balance and the stress-strain distribution in the Charpy V-notch specimen. Inertial effects were taken into account by a fully dynamic computation. It was shown that inertial oscillations are damped by viscoplasticity ahead the notch and vanish rapidly. 3D modelling is needed since large
Hausild, Petr +2 more
semanticscholar +4 more sources
Heat Treatment Effects on Microstructures and DBTT of F82H Steel Doped with Boron and Nitrogen
MATERIALS TRANSACTIONS, 2005 Effects of doping with 60 ppm B and/or 200 ppm N and heat treatments on the microstructures and the ductile-brittle transition temperature (DBTT) have been studied for ferritic/martensitic steel F82H. Prior austenitic grain size of standard F82H decreased from about 120 to 30 μm and also the DBTT decreased by about 50°C when the normalizing ...
Nariaki Okubo +5 more
semanticscholar +4 more sources
The Fracture Toughness and DBTT of MoB Particle-Reinforced MoSi<sub>2</sub> Composites
Key Engineering Materials, 2007 The room temperature fracture toughness and the high temperature DBTT of MoB particle-reinforced MoSi2 composites were investigated using Vickers indentation technique and MSP testing method， respectively. Modified Small Punch (MSP) test is a method for evaluation of mechanical properties using very small specimens, and it’s appropriate for the ...
Zhi Xiong, Gang Wang, Wan Jiang
semanticscholar +4 more sources