Results 1 to 10 of about 52,903 (306)

Diffuse-interface polycrystal plasticity: expressing grain boundaries as geometrically necessary dislocations [PDF]

Materials Theory, 2017
The standard way of modeling plasticity in polycrystals is by using the crystal plasticity model for single crystals in each grain, and imposing suitable traction and slip boundary conditions across grain boundaries.
Nikhil Chandra Admal, Giacomo Po, Jaime Marian   +2 more
doaj   +6 more sources

Microhardness model based on geometrically necessary dislocations for heterogeneous material

Journal of Materials Research and Technology, 2021
Lamellar cast irons are known as heterogeneous materials. Their overall hardness is determined by the microhardness of their microstructure contents.
Mohammed Mendas, Stéphane Benayoun, Mohamed Hadj Miloud, Ibrahim Zidane   +3 more
doaj   +3 more sources

Geometrically Necessary Dislocations on Plastic Deformation of Polycrystalline TRIP Steel [PDF]

Crystals, 2019
In this study, the main deformation behavior in terms of geometrically necessary dislocations (GND) was investigated on a transformation induced plasticity (TRIP) stainless steel by using sharp indentation at nanometric length scale.
Joan Josep Roa, Sebastián Suárez, Agustina Guitar, Gemma Fargas, Antonio Mateo   +4 more
doaj   +5 more sources

The Role of Geometrically Necessary Dislocations in Cantilever Beam Bending Experiments of Single Crystals. [PDF]

Materials (Basel), 2017
The mechanical behavior of single crystalline, micro-sized copper is investigated in the context of cantilever beam bending experiments. Particular focus is on the role of geometrically necessary dislocations (GNDs) during bending-dominated load ...
Husser E, Bargmann S.
europepmc   +2 more sources

Role of geometrically necessary dislocations on mechanical properties of friction stir welded single-phase copper with medium stacking fault energy

Journal of Materials Research and Technology, 2022
The contribution of geometrically necessary dislocations (GNDs) and grain boundaries (GBs) on the mechanical properties of different zones in a friction stir welded pure copper joint is unveiled. This representative and simple medium stacking fault metal
Akbar Heidarzadeh, Roghayeh Mohammadzadeh, Hamid Reza Jafarian, Catalin Iulian Pruncu, Aude Simar   +4 more
doaj   +2 more sources

Strain-hardening resilience via the cooperation of geometrically necessary dislocations and deformation twins in a strong and ductile lightweight high-entropy steel

Materials & Design
In the net-zero era, the burgeoning demands within engineering applications require materials that are not only lighter and stronger but also ductile.
Yi-Hsuan Sun, Shi-Wei Chen, Zen-Hao Lai, Shao-Lun Lu, Yi-Ting Lin, Jui-Fan Tu, Hung-Wei Yen   +6 more
doaj   +2 more sources

Trigonometric gradient microstructures in additively manufactured single crystals enable strength-ductility synergy and programmable performance. [PDF]

Nat Commun
Additively manufactured (AM) single crystals (SXs) show great promise for extreme-environment applications. AM process enhances gradient microstructures around dendrites, including dislocation densities, matrix channel width, precipitate area, and ...
Guo Z, Li Y, Fan L, Wu S, Hu D, Peng G, Lin F, Zhang YW, Xu Y, Yan W.   +9 more
europepmc   +2 more sources

Crystal Orientation and Dislocation Slip

Metals, 2023
It is a widely held belief that dislocation slip has a direct effect on crystal orientation. Some of the confusion may be attributed to semantics when researchers are referring to related effects of dislocations on crystal orientation; either elastic ...
Malcolm Griffiths
doaj   +1 more source

Dislocation behavior and strengthening mechanisms of Cu–Te alloy drawn at room and cryogenic temperatures

Journal of Materials Research and Technology, 2023
In the work, the cryogenic and room temperature drawing behaviors of Cu–Te alloy with a wide range of accumulative drawing true strain up to 1.1 are systematically investigated. For the first time, the storage of geometrically necessary dislocations (GND)
Qianqian Fu, Bing Li, Hongwang Fu, Minqiang Gao, Changfeng Wang, Ying Fu, Renguo Guan   +6 more
doaj   +1 more source

A numerical study of reversible plasticity using continuum dislocation mechanics

Comptes Rendus. Physique, 2021
In this contribution, an elasto-viscoplastic fast Fourier transform-based (EVPFFT) numerical implementation of the Mesoscale Field Dislocation Mechanics (MFDM) formulation, called MFDM-EVPFFT, is applied to study the reversible plastic behavior of ...
Berbenni, Stéphane, Lebensohn, Ricardo A.   +1 more
doaj   +1 more source