Results 31 to 40 of about 321 (148)

Study of mechanisms of crack formation on tungsten composites using the three-point method

Vìsnik Harkìvsʹkogo nacìonalʹnogo unìversitetu ìmenì V.N. Karazìna. Serìâ: fìzika., 2022
The aim of this study was evaluated the ductile-to-brittle transition temperature (DBTT) and microstructure of miniaturized tungsten composites by three point bending method.
M.V. Lebedieva, D. Terentyev, А. Лінкова, S.V. Lebediev   +3 more
doaj   +1 more source

Development of a micro-scale Y–Zr–O oxide-dispersion-strengthened steel fabricated via vacuum induction melting and electro-slag remelting

Nuclear Engineering and Technology, 2019
In this paper, the CLAM steel strengthened by micro-scale Y–Zr–O was prepared by vacuum induction melting followed by electroslag remelting (VIM-ESR). Yttrium (Y) and zirconium (Zr) were easy to aggregates into massive yttrium-zirconium-rich inclusions ...
Guoxing Qiu, Dongping Zhan, Changsheng Li, Min Qi, Zhouhua Jiang, Huishu Zhang   +5 more
doaj   +1 more source

Engineering Framework to Transfer the Lower Bound Fracture Toughness between Different Temperatures in the DBTT Region

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
openaire   +2 more sources

Temperature-dependent deformation and fracture properties of low-carbon martensitic steel in different stress states

Journal of Materials Research and Technology, 2023
The temperature-dependent ductile-brittle transition (DBT) in low-carbon martensitic steel is investigated in different stress states. To capture the effects of the stress state, tensile tests have been performed with flat specimens and three-point ...
Zhen Zhang, Fuhui Shen, Hanqing Liu, Markus Könemann, Sebastian Münstermann   +4 more
doaj   +1 more source

Charpy impact properties of EUROFER97-3 after neutron irradiation at 330 °C and 540 °C to damage doses of 21–23 dpa

Nuclear Materials and Energy
The reduced activation ferritic-martensitic (RAFM) EUROFER97-3 steel of two heat treatments (EUROFER97-3_1100/700 and EUROFER97-3_980/780) after irradiation in the BOR-60 fast reactor at temperatures of 330 °C and 540 °C, with damage doses ranging from ...
Vladimir Chakin, Carsten Bonnekoh, Ramil Gaisin, Rainer Ziegler, Michael Duerrschnabel, Michael Klimenkov, Bronislava Gorr, Michael Rieth   +7 more
doaj   +1 more source

DBTT Reduction Enabled by SiO2-Bearing Flux in Submerged Arc Welds

Welding Journal
The 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, MING ZHONG, HANJING ZHU, PENG ZUO, CONG WANG   +4 more
openaire   +1 more source

Recent Improvements in Size Effects Correlations for DBTT and Upper Shelf Energy of Ferritic Steels [PDF]

, 1993
Currently available correlations for the effects of specimen size on the upper shelf energy (USE) were developed for relatively ductile steels and do not serve as well when the steels become embrittled. Size effects correlations were developed recently for the impact properties of less ductile HT9 to be applied to other initially more ductile steels as
Kumar, A. S., Louden, B. S., Garner, F. A., Hamilton, M. L.   +3 more
openaire   +1 more source

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 ...
Okubo, Nariaki, Wakai, Eiichi, Matsukawa, Shingo, Furuya, Kazuyuki, Tanigawa, Hiroyasu, Jitsukawa, Shiro   +5 more
openaire   +2 more sources

Influence of preheating on tungsten damage under pulsed hydrogen plasma exposure

Nuclear Materials and Energy
Preheated tungsten plate behavior under multiple pulsed hydrogen plasma irradiations in the PW-7 plasma accelerator was investigated. The preheating temperature was 973 K, which is above the ductile to brittle transition temperature (DBTT ≈ 673 K).
A.B. Tazhen, M.K. Dosbolayev, A.N. Kholmirzayev, Y.A. Ussenov, T.S. Ramazanov   +4 more
doaj   +1 more source

New insights from crystallography into the effect of Ni content on ductile-brittle transition temperature of 1000 MPa grade high-strength low-alloy steel

Journal of Materials Research and Technology
The significant effect of Ni content (0.92, 1.94 and 2.94 wt%) on ductile-brittle transition temperature (DBTT) and microstructure in a 1000 MPa grade high-strength low-alloy (HSLA) steel was studied.
Zeqing Ni, Jingxiao Zhao, Xuelin Wang, Chengjia Shang, Wenhao Zhou   +4 more
doaj   +1 more source