Results 81 to 90 of about 2,346 (291)

Multiscale Modeling of Microcrystalline Materials [PDF]

, 2011
Materials with micrometer dimensions and their distinct mechanical properties have generated a great interest in the material science community over the last couple of decades. There is strong experimental evidence showing that microcrystalline materials
Hurtado Sepulveda , Daniel Esteban
core   +1 more source

Influence of Si Content and Milling Duration on the Microstructure and Mechanical–Tribological Properties of AlCoCrFeNiSi High‐Entropy Alloys

Advanced Engineering Materials, EarlyView.
Si‐doped AlCoCrFeNi high‐entropy alloys are synthesized by mechanical alloying to reveal the effect of Si content and milling time on phase evolution, microstructural refinement, and tribological behavior. A transition from FCC to BCC structure, significant grain refinement, and enhanced hardness and wear resistance are achieved, with the 4 at% Si ...
Mustafa Okumuş, Mehmet Emin Demir, Sercan Özpınar   +2 more
wiley   +1 more source

Triple Junctions as Dislocation‐Like Defects: The Role of Grain Boundary Crystallography Revealed by Experiment and Atomistic Simulation

Advanced Engineering Materials, EarlyView.
Grain boundary triple junctions are an essential ingredient of the microstructure of polycrystalline materials. In this study, a triple junction is observed using atomic‐resolution scanning transmission electron microscopy and characterized. Computer simulations reveal that the junction has a dislocation character that is determined by the joining ...
Tobias Brink, Saba Saood, Peter Schweizer, Jörg Neugebauer, Gerhard Dehm   +4 more
wiley   +1 more source

The effect mechanism of microstructure and impact toughness on M50 bearing steel under electroshock treatment: Experiments and atomic simulation

Materials & Design
To enhance the mechanical properties of M50 bearing steel, particularly its impact toughness, a novel electroshock treatment (EST) process was proposed, and the changes in its microstructure were analyzed in detail in this study.
Long Chen, Yanli Song, Kai Wu, Junhao Hu, Lin Hua, Jue Lu   +5 more
doaj   +1 more source

Grain boundary inclination dependence of GN dislocation patterns and density in bicrystal model

Nihon Kikai Gakkai ronbunshu, 2015
Deformation behaviors of polycrystalline metals are quite complex, and we are not easy to directly investigate them; thus, analyses employing simple models such as bicrystals are required.
Yoshiki KAWANO, Naoya TAMARU, Satoru ISHII, Tsuyoshi MAYAMA, Ryouji KONDOU, Tetsuya OHASHI   +5 more
doaj   +1 more source

Heterogeneous Strain Distribution and Saturation of Geometrically Necessary Dislocations in a Ferritic-Pearlitic Steel during Lubricated Sliding

, 2018
The microstructural evolution of ferritic-pearlitic steel is studied during unidirectional sliding under boundary lubrication using a ball‐on‐flat configuration.
Carsten Gachot, Mücklich, Frank, Franek, Friedrich, Manel Rodríguez Ripoll, Gachot, Carsten; orcid:, Mathias Linz, Andreas Steiger-Thirsfeld, Frank Mücklich, Christoph Pauly, Rodríguez Ripoll, Manel, Pauly, Christoph, Bernardi, Johannes, Friedrich Franek, Johannes Bernardi, Steiger-Thirsfeld, Andreas, Linz, Mathias   +15 more
core   +1 more source

Microstructure, Thermal Transport, and Dry‐Sliding Tribology of Powder‐Metallurgy Al7075 Composites Reinforced With Sol–Gel‐Derived ZnO–rGO Hybrid Nanoparticles

Advanced Engineering Materials, EarlyView.
Sol–gel‐derived ZnO–rGO hybrid nanoparticles enable Al7075 powder‐metallurgy composites to achieve concurrent gains in hardness and thermal conductivity while markedly lowering friction and wear. The hybrid architecture couples ZnO‐based load support with rGO‐assisted lamellar sliding and heat spreading, revealing a promising route toward lightweight ...
Bunyamin Aksakal, Cevher Kursat Macit, Merve Ayık, Hakan Tutumlu   +3 more
wiley   +1 more source

Relationship between Formation of Geometrically Necessary Dislocations and Local Strain Hardening of Slip Systems in Symmetric type Bicrystalsunder Tensile Loading [PDF]

, 2005
Slip deformation in symmetric-type bicrystal models subjected to tensile load is investigated by a finite element crystal plasticity analysis code. Accumulation of geometrically necessary dislocations (GNDs) and statistically stored dislocations (SSDs ...
近藤, 了嗣, 大橋, 鉄也
core  

Indentation size effectin tungsten: Quantification of geometrically necessary dislocations underneath the indentations using HR-EBSD

, 2018
During indentation testing of the low defect density crystalline materials, higher hardness values are found at lower indentation depths, which is referred to as an indentation size effect. The depth-dependence of hardness can be described by the Nix-Gao
Bruder, Enrico, Farhan Javaid, Karsten Durst, Xu, Y., Durst, Karsten, Enrico Bruder, Javaid, Farhan, Yukun Xu   +7 more
core   +1 more source

Electrified Damage in Motion Systems

Advanced Engineering Materials, EarlyView.
The electrified damage in motion systems is a fundamental framework presenting the degradation pathway arising from the coupling of electrical energy transport with mechanical contact and interfacial chemistry. The framework positions electrified damage as a distinct degradation regime with unique characteristic surface morphologies and failures of ...
M. Humaun Kabir, Angelina Nguyen, Hong Liang   +2 more
wiley   +1 more source