Results 21 to 30 of about 15,379 (289)

Residual elastic stress−strain field and geometrically necessary dislocation density distribution around nano-indentation in TA15 titanium alloy

Transactions of Nonferrous Metals Society of China, 2013
Abstract Nanoindentation and high resolution electron backscatter diffraction (EBSD) were combined to examine the elastic modulus and hardness of α and β phases, anisotropy in residual elastic stress–strain fields and distributions of geometrically necessary dislocation (GND) density around the indentations within TA15 titanium alloy.
Honggang Dong, Jingchuan Zhu, Z. Lai, Yong Liu, Xiawei Yang, Zhisheng Nong   +5 more
semanticscholar   +2 more sources

Achieving excellent strength-ductility synergy via high density dislocation and nano-twinning in cryo-rolled FeCoCrNiMo0.2 high-entropy alloy

Journal of Materials Research and Technology, 2023
High-density dislocations and nano-twinning are known to significantly influence the work hardening ability of materials, presenting a potent approach for enhancing their overall strength.
Fei Chen, Fei Liu, Yuan-Biao Tan, Wei Shi, Song Xiang   +4 more
doaj   +1 more source

Discrete dislocation simulations and size dependent hardening in single slip [PDF]

, 1998
Plastic deformation in two-dimensional monophase and composite materials is studied using a discrete dislocation dynamics method. In this method, dislocations are represented by line defects in a linear elastic medium, and their interactions with ...
Cleveringa, H.,, Giessen, E. van der,, Needleman, A.,   +2 more
core   +11 more sources

Characterization of Dislocation Structure in a Nb-bearing Austenitic Stainless Steel After Low Cycle Fatigue via TEM and EBSD

Materials Research, 2021
In this paper, the relationship between Kernel average misorientation (KAM), geometrically necessary dislocation (GND) density and dislocation structures of Nb-bearing austenitic stainless steel under low cycle fatigue (LCF) was studied at 600°C at the ...
Liangwei Fang, Wei Zhao, Yong Wei, Qi Zhang, Liqiang Zhang, Naqash Ali, Hongwei Zhou, Hailian Wei   +7 more
doaj   +1 more source

A Dislocation-Crystal Plasticity Simulation on FCC Single Crystal Considering Geometrically Necessary Dislocation Density and Incompatibility

Journal of Computational Science and Technology, 2008
Y. Aoyagi, K. Shizawa
semanticscholar   +3 more sources

Strain-gradient effect on the crack tip dislocations density

Fracture and Structural Integrity, 2020
In this study, the influence of a material’s plastic properties on the crack tip fields and dislocation density behavior is analytically and numerically analyzed using the conventional mechanism-based strain-gradient plasticity (CMSGP) theory established
Valery Shlyannikov, Andrey Tumanov, Ruslan Khamidullin   +2 more
doaj   +3 more sources

Evolution of geometrically necessary dislocation density from computational dislocation dynamics

IOP Conference Series: Materials Science and Engineering, 2009
This paper presents a method for calculating GND densities in dislocation dynamics simulations. Evolution of suitably defined averages of GND density as well as maps showing the spatial nonuniform distribution of GNDs are analyzed under uniaxial loading.
P J Guruprasad, A A Benzerga
openaire   +1 more source

Electropulsing treatment-induced the enhanced recrystallization of deformed Al0.1CoCrFeNi high-entropy alloy at lower temperature

Journal of Materials Research and Technology, 2023
It is urgent to explore an efficient treatment strategy to obtain characteristic microstructures for better mechanical properties of alloys in an era of energy shortage.
Yafei Wang, Weichao Wu, Fei Cui, Xiaojun Yang   +3 more
doaj   +1 more source

Using coupled micropillar compression and micro-Laue diffraction to investigate deformation mechanisms in a complex metallic alloy Al13Co4 [PDF]

, 2016
In this investigation, we have used in-situ micro-Laue diffraction combined with micropillar compression of focused ion beam milled Al13Co4 complex metallic alloy to study the evolution of deformation in Al13Co4.
Ayan Bhowmik, Claudia Walter, David Dye, Finn Giuliani, Giorgio Sernicola, Hosford W. F., Igor P. Dolbnya, Nicholas G. Jones, Peter Gille, T. Ben Britton, William J. Clegg   +10 more
core   +2 more sources

Influence of misorientation angle and local dislocation density on β-phase distribution in Al 5xxx alloys

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