Results 41 to 50 of about 10,703 (292)
γʹ and γ″ co-precipitation phenomena in directly aged Alloy 718 with high δ-phase fractions
Materials & DesignCo-precipitation of γ′ and γ′′ is the main strengthening mechanism that provides superior high-temperature strength in directly aged Alloy 718 aerospace parts.
Vitor V. Rielli +6 more
doaj +1 more source
, 2012 Acoustic emission is used here to study melting and solidification of embedded indium particles in the size range of 0.2 to 3 um in diameter and to show that dislocation generation occurs in the aluminum matrix to accommodate a 2.5% volume change.
A. Galeski +33 more
core +1 more source
Deformation compatibility in a single crystalline Ni superalloy [PDF]
, 2015 Deformation in materials is often complex and requires rigorous understanding to predict engineering component lifetime. Experimental understanding of deformation requires utilization of advanced characterization techniques, such as high spatial ...
Britton, T, Dunne, F, Jiang, J, Zhang, T
core +2 more sources
Geometrically necessary dislocations and strain-gradient plasticity: a few critical issues [PDF]
Scripta Materialia, 2003 Abstract A few issues related to the modeling of size effects in terms of geometrically necessary dislocations (GNDs) are critically discussed, viz. strain hardening, length scale dependence, types of GND arrays. Consequences are drawn regarding the continuum modeling of size effects in plasticity.
L.P Kubin, A Mortensen
openaire +1 more source
Atomic Size Misfit for Electrocatalytic Small Molecule Activation
Advanced Functional Materials, EarlyView.This review explores the application and mechanisms of atomic size misfit in catalysis for small molecule activation, focusing on how structural defects and electronic properties can effectively lower the energy barriers of chemical bonds in molecules like H2O, CO2, and N2.
Ping Hong +3 more
wiley +1 more source
MetalsThe strength–ductility mechanism of the low-carbon steels processed by laser cutting is investigated in this paper. A typical gradient-phased structure can be obtained near the laser cutting surface, which consists of a laser-remelted layer (LRL, with ...
Jie Chen +3 more
doaj +1 more source
In-situ observation of dislocation dynamics near heterostructured interfaces
Materials Research Letters, 2019 There has been a long-standing controversy on how dislocations interact with interfaces. Here we report in-situ observations that in a Cu–brass heterostructured TEM film Frank–Read sources are the primary dislocation sources. They were dynamically formed
Hao Zhou +10 more
doaj +1 more source
Scientific Reports, 2022 Al–Mg alloys undergo sensitization when exposed to elevated temperatures, making them susceptible to intergranular corrosion and stress corrosion cracking. Most of the existing research on microstructure effects on sensitization is centered on the effect
Jahnavi Desai Choundraj, Josh Kacher
doaj +1 more source
Strain-Gradient Crystal Plasticity Finite Element Modeling of Slip Band Formation in α-Zirconium
Crystals, 2021 Two methods for the determination of geometrically necessary dislocation (GND) densities are implemented in a lower-order strain-gradient crystal plasticity finite element model. The equations are implemented in user material (UMAT) subroutines. Method I
Omid Sedaghat, Hamidreza Abdolvand
doaj +1 more source
Scaling in Plasticity-Induced Cell-Boundary Microstructure: Fragmentation and Rotational Diffusion
, 2003 We develop a simple computational model for cell boundary evolution in plastic deformation. We study the cell boundary size distribution and cell boundary misorientation distribution that experimentally have been found to have scaling forms that are ...
A. Godfrey +17 more
core +1 more source