Results 31 to 40 of about 196,218 (321)

Effect of Texture on the Ductile–Brittle Transition Range and Fracture Mechanisms of the Ultrafine-Grained Two-Phase Ti-6Al-4V Titanium Alloy

Metals, 2023
In this work, the technique of equal-channel angular pressing (ECAP) that enables producing bulk billets was used to form a UFG structure in Ti-6Al-4V alloy. A subsequent warm upsetting simulates die forging and the production of a part.
Iuliia M. Modina, Grigory S. Dyakonov, Alexander V. Polyakov, Andrey G. Stotskiy, Irina P. Semenova   +4 more
doaj   +1 more source

On the history and status of reactor pressure vessel steel ductile to brittle transition temperature shift prediction models

, 2019
This paper melds an overview of the history of Reactor Pressure Vessel (RPV) embrittlement research, focusing on predicting ductile-to-brittle transition temperature shifts (ΔT), along with an assessment of the current status of these efforts, especially
G. Odette, Takuya Yamamoto, T. Williams, R. Nanstad, C. English   +4 more
semanticscholar   +1 more source

Surface imaging of metallic material fractures using optical coherence tomography [PDF]

, 2014
We demonstrate the capability of optical coherence tomography (OCT) to perform topography of metallic surfaces after being subjected to ductile or brittle fracturing.
Demian, D., Hutiu, G., Bradu, Adrian, Podoleanu, Adrian G.H., Duma, V.F.   +4 more
core   +1 more source

Studies of the formation and distribution of cracks and various defects on the heated tungsten plate surface during pulsed plasma flux impact

Nuclear Materials and Energy, 2023
In this work, cracking of the surface of a tungsten plate was studied using a PW-7 pulsed plasma accelerator. The surface of the tungsten plate was exposed at an energy density and plasma flux duration of 1.1 MJ/m2 and 200 μs, respectively.
M.K. Dosbolayev, A.B. Tazhen, A.N. Kholmirzayev, Y.A. Ussenov, T.S. Ramazanov   +4 more
doaj   +1 more source

On the determination of the ductile to brittle transition temperature from small punch tests on Grade 91 ferritic-martensitic steel

, 2017
The exposure of structural materials to the environment in nuclear power plants leads to aging through thermal and/or irradiation effects. One of the consequences of this aging is the shift of the ductile to brittle transition temperature ( D B T T ...
M. Bruchhausen, S. Holmström, J. Lapetite, S. Ripplinger   +3 more
semanticscholar   +1 more source

Some Aspects of Structural Modeling of Damage Accumulation and Fracture Processes in Metal Structures at Low Temperature

Modelling and Simulation in Engineering, 2016
The problem of brittle fracture of structures at low temperature conditions connected to damage accumulation and ductile-brittle transition in metals. The data for locomotive tire contact impact fatigue and spalling are presented.
Valeriy Lepov, Albert Grigoriev, Valentina Achikasova, Kyunna Lepova   +3 more
doaj   +1 more source

Ductile-to-Brittle Transition and Brittle Fracture Stress of Ultrafine-Grained Low-Carbon Steel

Materials, 2021
Ductile-to-brittle transition (DBT) temperature and brittle fracture stress, σF, are important toughness criteria for structural materials. In this paper, low-carbon steels with an ultrafine elongated grain (UFEG) structure (transverse grain size 1.2 μm)
Tadanobu Inoue, H. Qiu, R. Ueji, Y. Kimura   +3 more
semanticscholar   +1 more source

Machine-Learning-Based Composition Analysis of the Stability of V–Cr–Ti Alloys

Journal of Nuclear Engineering, 2023
Machine learning methods allow the prediction of material properties, potentially using only the elemental composition of a molecule or compound, without the knowledge of molecular or crystalline structures.
Katsuaki Tanabe
doaj   +1 more source

Simulation of seismic waves at the earth's crust (brittle–ductile transition) based on the Burgers model [PDF]

Solid Earth, 2014
The earth's crust presents two dissimilar rheological behaviors depending on the in situ stress-temperature conditions. The upper, cooler part is brittle, while deeper zones are ductile.
J. M. Carcione, F. Poletto, B. Farina, A. Craglietto   +3 more
doaj   +1 more source

Constraining the long-term evolution of the slip rate for a major extensional fault system in the central Aegean, Greece, using thermochronology [PDF]

, 2006
The brittle/ductile transition is a major rheologic boundary in the crust yet little is known about how or if rates of tectonic processes are influenced by this boundary.
Brichau, S., Carter, Andrew, Ketcham, R.A., Ring, U.   +3 more
core   +1 more source