Results 1 to 10 of about 1,476 (257)

Graded Brittle–Ductile Transition via Laser-Induced Thermal Gradient for Broaching of Z10C13 Steel [PDF]

Micromachines
This paper presents a breakthrough in activating the skin effect at conventional broaching speeds (1–8 m/min) by using laser defocus gradient modification to induce surface embrittlement in martensitic stainless steel Z10C13.
Guozhen Liu, Zhen Meng, Junqiang Zheng, Weiguang Liu, Xinghua Wu, Jing Ni, Haohan Zhang   +6 more
doaj   +2 more sources

Geometrically Necessary Dislocation Analysis of Deformation Mechanism for Magnesium under Fatigue Loading at 0 °C

Crystals, 2023
This study focused on the analysis of geometrically necessary dislocation (GND) densities for five selected fine-grained magnesium samples. Among the samples, three were tested under different fatigue-loading conditions at 0 °C, one experienced quasi ...
Qizhen Li
doaj   +1 more source

Improving Texture and Microstructure Homogeneity in High-Purity Ta Sheets by Warm Cross Rolling and Annealing

Metals, 2021
The evolution of texture and microstructure uniformity in high-purity tantalum (Ta) sheets during 135° warm cross rolling (WCR) was analyzed in detail.
Doudou Long, Shifeng Liu, Jialin Zhu, Yahui Liu, Shiyuan Zhou, Xiaoli Yuan, Dmytro Orlov   +6 more
doaj   +1 more source

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

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

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. Results evidence that austenitic grains display an isotropic behavior on terms of GND, the main deformation mechanism ...
Roa Rovira, Joan Josep, Suárez Vallejo, Sebastian, Guitar, Agustina, Fargas Ribas, Gemma, Mateo García, Antonio Manuel   +4 more
openaire   +4 more sources

Dislocation array reflection enhances strain hardening of a dual-phase heterostructured high-entropy alloy

Materials Research Letters, 2023
Piling-ups of geometrically necessary dislocation (GND) arrays against interfaces are known to produce hetero-deformation induced (HDI) strengthening and strain hardening to enhance the strength and ductility of heterostructured materials. Here we report
Yi Liu, Mengning Xu, Lirong Xiao, Xuefei Chen, Zhaohua Hu, Bo Gao, Ningning Liang, Yuntian Zhu, Yang Cao, Hao Zhou   +9 more
doaj   +1 more source

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

Modeling of extra strengthening in gradient nanotwinned metals based on molecular dynamics

Frontiers in Materials, 2022
Gradient nanotwinned metals exhibit extra strengthening and work hardening behaviors, which have enormous potential for engineering applications. In this study, molecular dynamics method is performed for analyzing the effects of nanotwinned structure ...
Zailin Yang, Zailin Yang, Xiaoyang Ding, Yong Yang, Yong Yang, Minghe Li, Shihao Cao   +6 more
doaj   +1 more source

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. In this fashion, the system is modeled as a collection of boundary-value problems with matching boundary conditions.
Nikhil Chandra Admal, Giacomo Po, Jaime Marian   +2 more
openaire   +3 more sources