Results 41 to 50 of about 86,765,181 (295)

Mechanical response and brittle-ductile transition of porous sandstone under true-triaxial loading

Journal of Rock Mechanics and Geotechnical Engineering
This study investigates the influence of mean stress and Lode angle on the mechanical behavior of porous sandstone. Sandstone specimens were tested using a newly developed true-triaxial loading apparatus under five constant Lode angle conditions and ...
Junjie Xiao, Xing Li, Jiacun Liu, Dongping Liu, Kaiwen Xia   +4 more
doaj   +1 more source

High‐Temperature Phase Transformation in a V‐9Si‐6.5B Alloy: The Kinetic and Crystallographic Pathway From V5SiB2 to V8SiB4

Advanced Engineering Materials, EarlyView.
In situ synchrotron high‐energy X‐ray diffraction reveals the real‐time high‐temperature phase evolution of a ternary V‐9Si‐6.5B alloy. The study uncovers a kinetically delayed V5SiB2 → V8SiB4 transformation governed by massive structural and chemical barriers.
Zahra Sabeti, Andreas Stark, Roja Rani Korrayi, Florian Pyczak, Georg Hasemann   +4 more
wiley   +1 more source

Experimental Study on the Brittle-Ductile Response of a Heterogeneous Soft Coal Rock Mass under Multifactor Coupling

Geofluids, 2019
After a gas drainage event causes different degrees of initial porosity in the coal seam, the heterogeneity of the coal mass becomes much more obvious. In this paper, soft coal testing samples with different degrees of heterogeneity were prepared first ...
Weijian Yu, Genshui Wu, Baifu An, Ping Wang   +3 more
doaj   +1 more source

Surface Morphology Evaluation and Material Removal Mechanism Analysis by Single Abrasive Scratching of RB-SiC Ceramics

Crystals, 2022
Reaction-Bonded Silicon Carbide (RB-SiC) ceramics possessing excellent mechanical and chemical properties, whose surface integrities have an essential effect on their performance and service life, have been widely used as substrates in the core parts of ...
Zhangping You, Haiyang Yuan, Xiaoping Ye, Liwu Shi   +3 more
doaj   +1 more source

Ductile-to-brittle transition in spallation of metallic glasses

, 2014
In this paper, the spallation behavior of a binary metallic glass Cu50Zr50 is investigated with molecular dynamics simulations. With increasing the impact velocity, micro-voids induced by tensile pulses become smaller and more concentrated.
Huang X, Dai, LH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China., 戴兰宏, Ling Z   +3 more
core   +1 more source

Impact of MgO Additions on the Oxidation Resistance and Compression Behavior of Vanadium Alloys

Advanced Engineering Materials, EarlyView.
An increase in oxidation resistance at 600 °C is achieved for alloys containing more than 2.5 wt.% MgO. It has been established that, along with V2O5, MgO6V2, and Mg2O7V2 are formed, which are presumed to enhance oxidative stability. Furthermore, the possible transformation of Mg‐vanadates through reaction with CO2, which presumably occurs in this ...
Ievgen Solodkyi, Mathias Galetz, Georg Hasemann, Fabian Lanoy, Emma White, Manja Krüger   +5 more
wiley   +1 more source

Suppressing scratch-induced brittle fracture in silicon by geometric design modification of the abrasive grits

Journal of Materials Research and Technology, 2019
The overarching goal of this research was to investigate the application of spherically shaped abrasive particles in achieving ductile-mode cutting. Scratching experiments were carried out to assess the differences between arbitrarily and spherically ...
Andrii M. Kovalchenko, Saurav Goel, Islam M. Zakiev, Evgeniy A. Pashchenko, Rajab Al-Sayegh   +4 more
doaj   +1 more source

Brittle-to-ductile transition of PLA induced by macromolecular orientation

eXPRESS Polymer Letters, 2020
This work deals with the influence of biaxial orientation on the mechanical behavior of Polylactide (PLA) films. Comparisons between a crystallizable grade and a non-crystallizable one have been made in order to separate the effect of macromolecular ...
S. Xu, J.-F. Tahon, I. De-Waele, G. Stoclet, V. Gaucher   +4 more
doaj   +1 more source

Brittle-to-ductile transition in polycrystalline NiAl

Acta Materialia, 1997
Abstract The brittle-to-ductile transition (BDT) of stoichiometric NiAl and Ni 49Al 1Ti alloys was investigated using tensile and fracture toughness testing methods. The BDT in these alloys was found to be associated with a sharp drop in strain hardening rate, which causes the general yielding and plastic instability (necking) to precede unstable ...
Materials Science and Engineering Department, University of Florida, Gainesville, FL 32611, U.S.A. ( host institution ), Ebrahimi, F., Hoyle, T.G.   +2 more
openaire   +2 more sources

Ductile To Brittle Transition In Dynamic Fracture Of Brittle Bulk Metallic Glass

, 2008
We report an unusual transition from a locally ductile to a pure brittle fracture in the dynamic fracture of brittle Mg65Cu20Gd10 bulk metallic glass. The fractographic evolution from a dimple structure to a periodic corrugation pattern and then to the ...
Wang, WH (reprint author), Chinese Acad Sci, Inst Phys, POB 603, Beijing 100080, Peoples R China., Han YN, Wang G, Han BS, 柯孚久, 许向红, Wang WH   +6 more
core   +1 more source