Results 31 to 40 of about 4,276 (180)

Experimental study of grain structures evolution and constitutive model of isothermal deformed 2A14 aluminum alloy

Journal of Materials Research and Technology, 2021
Softening mechanism and microstructure evolution of 2A14 aluminum alloy were studied via isothermal deformation tests under the temperatures range from 573 K to 773 K and strain rates range from 10−3 s−1 to 1 s−1. Microstructures indicated that the grain
Qiang Wang, Xiyu He, Yunlai Deng, Jiuhui Zhao, Xiaobin Guo   +4 more
doaj   +1 more source

Dipole-dipole interactions in confined planar geometries [PDF]

, 2021
This thesis investigates the dipole-dipole interactions of thermal atomic vapors that are confined by a planar surface or a nanocavity and subjected to near-resonant light.
Dobbertin, Helge (gnd: 1255094699)
core   +1 more source

Crystal plasticity evaluation of the effect of grain morphology on compressive deformation behavior of AA2099 Al–Li alloy

Journal of Materials Research and Technology, 2023
The strip-like grain shape is one of three important factors (the strip-like grain shape, strong crystallographic texture and plate-like T1 precipitate) influencing the mechanical properties of the third-generation Al–Li alloys.
Li Hu, Mengdi Li, Weijiu Huang, Xusheng Yang, Fei Guo   +4 more
doaj   +1 more source

Estimating dislocation density from electron backscatter diffraction data for an AZ31/Mg-0.6Gd hybrid alloy fabricated by high-pressure torsion [PDF]

The Geometrically Necessary Dislocation (GND) density was estimated from Electron Backscatter Diffraction (EBSD) data for an AZ31/Mg-0.6Gd (wt.%) hybrid material fabricated by high-pressure torsion (HPT) at room temperature through an equivalent strain ...
Langdon, T. G., Baudin, T., Brisset, F., Azzeddine, H., Huang, Yi   +4 more
core   +2 more sources

Particle interspacing effects on the mechanical behavior of a Fe–TiB2 metal matrix composite using FFT-based mesoscopic field dislocation mechanics

Advanced Modeling and Simulation in Engineering Sciences, 2020
This paper presents an application to metal matrix composites (MMCs) of an enhanced elasto-viscoplastic Fast Fourier Transform (EVP-FFT) formulation coupled with a phenomenological continuum Mesoscale Field Dislocation Mechanics (MFDM) theory.
J. Genée, S. Berbenni, N. Gey, R. A. Lebensohn, F. Bonnet   +4 more
doaj   +1 more source

Investigation of size effect on flow stress of Cu-3wt.%Ag-0.5 wt%Zr thin sheets at room and cryogenic temperature based on geometrically necessary dislocation evolution behavior

Journal of Materials Research and Technology
The influence of the grain sizes ranging from 23.4 to 69.2 μm on mechanical properties of Cu-3wt.%Ag-0.5 wt%Zr thin sheets was investigated by conducting uniaxial tensile experiments at room temperature (RT 298 K) and cryogenic temperature (CT 77 K).
Han Wang, Peng Zhang, ChuanJie Wang, Qiang Zhu, Gang Chen   +4 more
doaj   +1 more source

Effects of Building Directions on Microstructure, Impurity Elements and Mechanical Properties of NiTi Alloys Fabricated by Laser Powder Bed Fusion

Micromachines, 2023
For NiTi alloys prepared by the Laser Powder Bed Fusion (LPBF), changes in the building directions will directly change the preferred orientation and thus directly affect the smart properties, such as superelasticity, as well as change the distribution ...
Shuo Wang, Xiao Yang, Jieming Chen, Hengpei Pan, Xiaolong Zhang, Congyi Zhang, Chunhui Li, Pan Liu, Xinyao Zhang, Lingqing Gao, Zhenzhong Wang   +10 more
doaj   +1 more source

Comparative analysis of plasticity-based GND density estimation methods in crystal plasticity finite element models

Computational Materials Science
In crystal plasticity finite element (CPFE) simulations, accurately quantifying geometrically necessary dislocations (GNDs) is critical for capturing strain gradients in polycrystals. We compare different methods for quantifying GNDs, all of which originate from the Nye tensor, which is computed as the curl of the plastic deformation gradient.
Michael Pilipchuk, Chaitali Patil, Veera Sundararaghavan   +2 more
openaire   +2 more sources

Dislocation density in fine grain-size spark-plasma sintered aluminum measured using high brightness synchrotron radiation

, 2020
Three-dimensional orientation mapping of samples of aluminum prepared by spark plasma sintering (SPS) with average grain sizes of 5 μm and 1 μm has been carried out using high-brightness synchrotron radiation, from which the geometrically necessary ...
Zhang, C.L., Liu, W., Godfrey, A., Xu, Ruichao, Juul Jensen, D., Zhang, Y., Wu, G. L.   +6 more
core   +1 more source

Effects of microstructure on high cycle fatigue properties of dual-phase Ti alloy: combined nonlocal CPFE simulations and extreme value statistics

Journal of Materials Research and Technology, 2020
The nonlocal crystal plasticity finite element (CPFE) simulations and extreme value statistics were combined to study the effects of microstructure on the high cycle fatigue (HCF) behavior of dual-phase Ti alloy.
Mengqi Zhang, Fengbo Han, Bin Tang, Hongchao Kou, Jiangkun Fan, Jinshan Li   +5 more
doaj   +1 more source