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Effect of CNTs on Activation Volume and Mobile Dislocation Exhaustion Rate of CNTs/Al under Compression Loading
In this study, stress relaxation compression tests were performed to investigate the strain rate sensitivity, activation volume and mobile...
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Dislocation loop bias and void swelling in irradiated α-iron from mesoscale and atomistic simulations
Dislocation loops are ubiquitous in irradiated materials, and dislocation loop bias plays a critical role in void swelling. However, due to...
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Harnessing dislocation motion using an electric field
Dislocation motion, an important mechanism underlying crystal plasticity, is critical for the hardening, processing and application of a wide range...
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Quantitative tests revealing hydrogen-enhanced dislocation motion in α-iron
Hydrogen embrittlement jeopardizes the use of high-strength steels in critical load-bearing applications. However, uncertainty regarding how hydrogen...
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Anomalous response to creep deformation from dislocation density during electrically assisted creep aging
Adding numerous dislocations into metallic materials before the forming stage significantly enhances their deformability. However, this beneficial...
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Finite-temperature screw dislocation core structures and dynamics in α-titanium
A multiscale approach based on molecular dynamics (MD) and kinetic Monte Carlo (kMC) methods is developed to simulate the dynamics of an 〈 a 〉 screw...
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Incorporating Dislocation Mechanisms into a Phenomenological Cyclic Plasticity Model for Structural Alloys
This article presents an approach to incorporating dislocation mechanisms into a phenomenological cyclic plasticity model that describes the cyclic...
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Dislocation evolution and induced precipitation on corrosion resistance of a novel Al-Mg-Zn-Er-Zr alloy during hot compression
Al-Mg-Zn-Er-Zr alloy was compressed in temperature range from 300 to 500 °C to investigate the microstructure evolution. Molecular dynamics...
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Precipitate and dislocation-density interactions affecting strength and ductility in inconel alloys
Grain and precipitate morphologies, orientations, and distributions in precipitation hardened nickel alloy 718 are directly affected by material...
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Modeling dislocation interactions with grain boundaries in lath martensitic steels
Martensitic steels are widely used as a structural material in critical components of fossil fuel and nuclear power plants, such as boilers, pipes,...
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Quantifying the Dislocation Cell Contribution to the Yield Strength of 316L Steel
The present work investigates the contribution of dislocation cell to the yield strength of additively manufactured (AM) 316L steel through...
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Modeling the Evolution of the Dislocation Density and Yield Stress of Al over a Wide Range of Temperatures and Strain Rates
This paper introduces an extended model for the evolution of internal and wall dislocation densities in pure aluminum during plastic deformation. The...
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Nonequilibrium statistical thermodynamics of thermally activated dislocation ensembles: part 2—ensemble evolution toward correlation of enthalpy barriers
In part 1, we formally defined important physical concepts in statistical thermodynamics that undergird internal state variable (ISV) theory such as...
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Characterization of dislocations induced by Vickers indentation in GaN for explaining size ratios of dislocation patterns
AbstractCharacteristics of dislocations induced by Vickers indentation in hydride vapor phase epitaxy GaN were investigated. Dislocations in a...
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Dislocation-based high-temperature plasticity of polycrystalline perovskite SrTiO3
Dislocation networks have been demonstrated to substantially enhance functional properties. As-sintered samples are virtually devoid of dislocations,...
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A new method for predicting dislocation emission of grain boundary in bicrystal Mg
Due to its high volume percentage, the grain boundary seriously influences the strength and plasticity of nanocrystal materials. Whereas, predicting...
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Multi-Phase-Field Simulation of the Dynamic Dragging of Dislocation on the Solute Atoms and Point Defects
Point defects and dislocation can be induced in dual-phase stainless steels in the circumstance of irradiation. These defects affect the phase...
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Comparison of Dislocation Loop Formation Resistance in Nanocrystalline and Coarse-Grained Refractory High Entropy Alloys
In nanocrystalline high entropy alloys (HEAs), the difference in chemistry and the density of interfaces play a role in the microstructure evolution,...
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Quantitative insights into the dislocation source behavior of twin boundaries suggest a new dislocation source mechanism
Pop-in statistics from nanoindentation with spherical indenters are used to determine the stress required to activate dislocation sources in twin...
