Results 21 to 30 of about 569 (211)

Rheological transitions in the middle crust: insights from Cordilleran metamorphic core complexes [PDF]

Solid Earth, 2017
High-strain mylonitic rocks in Cordilleran metamorphic core complexes reflect ductile deformation in the middle crust, but in many examples it is unclear how these mylonites relate to the brittle detachments that overlie them.
F. J. Cooper, J. P. Platt, W. M. Behr
doaj   +1 more source

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
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Depth‐Dependent Slow Earthquakes Controlled by Temperature Dependence of Brittle‐Ductile Transitional Rheology

Geophysical Research Letters, 2023
The discovery of slow earthquakes illuminates the existence of a strange depth dependence of seismogenesis, which contradicts the common understanding of smooth brittle/seismic‐ductile/aseismic transition as going deeper into the earth's surface layers ...
Ryosuke Ando, Kohtaro Ujiie, Naoki Nishiyama, Yasushi Mori   +3 more
doaj   +1 more source

Reference toughness – a pragmatic tool to estimate ductile-brittle transition temperatures

Procedia Structural Integrity, 2018
Abstract Recent advances show that tough as-quenched ultra-high-strength steels in fully and partially martensitic conditions demand proper control of the effective coarse grain size, which is the key microstructural parameter controlling the toughness in the ductile-brittle transition region.
Pallaspuro, S. (Sakari), Mehtonen, S. (Saara), Kömi, J. (Jukka), Zhang, Z. (Zhiliang), Porter, D. (David)   +4 more
openaire   +3 more sources

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
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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
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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
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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
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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
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EXPERIMENTAL INVESTIGATION OF THE FAILURE BEHAVIOUR OF POLYPROPYLENE COMPOUNDS FOR INSTRUMENTED PUNCTURE TESTS

Acta Polytechnica CTU Proceedings, 2018
Instrumented puncture tests according to ISO 6603-2 and ASTMD3763 were executed for five different Polypropylene compounds (talcum-, glass fibre- and elastomer modified) with specimen thicknesses ranging from 1mm to 4 mm.
Florian Kiehas, Anna Kalteis, Michael Jerabek, Zoltán Major   +3 more
doaj   +1 more source