gradient dependent deformation of two phase single crystals
Modelling plastic deformation in a single-crystal nickel
Modelling plastic deformation in a single-crystal nickel-based superalloy using the precipitate phase that ranges between 40 and 70 . and gradient-dependent deformation (Meissonnier et al
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Microstructures induced by a stress gradient in a nickel-based superalloy. Anisotropic creep behavior of a nickel-based super-alloy compared with single phase nickel solid solution and γ′ phase single crystals. Gradient-dependent deformation of two-phase single crystals.
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Many two-phase alloys work-harden much faster than do pure single crystals. This is because the two phases are not equally easy to deform. Based on gradient-dependent plasticity where an
Get PriceTemperature dependence of elastic and plastic deformation
Single-phase solid-solution refractory high-entropy alloys (HEAs) show remarkable mechanical properties such as their high yield strength and substantial softening resistance at elevated temperatures. Hence the in-depth study of the deformation behavior for body-centered cubic (BCC) refractory HEAs is a critical issue to explore the uncovered/unique deformation mechanisms.
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Oct 12 2018 · Because of the aforementioned unique GSFE the γ-TiAl crystals deform differently from the FCC crystals. According to previous experimental studies 5 11 13 plastic deformation of bulk single
Get PriceAn FFT based strain gradient crystal plasticity study of
An FFT based strain gradient crystal plasticity study of grain boundaries "Gradient-dependent deformation of two-phase single crystals" J. Mech. Phy. Solids 48 (2000). 2 P. Eisenlohr M. Diehl R.A. Lebensohn and F. Roters "A spectral method solution to crystal
Get PriceSoft phononic crystals with deformation-independent band
Three types of two-phase designs are proposed (i) a solid–solid PC with constant ET for both phases (ii) a solid–void PC with constant ET for the matrix phase (iii) a solid–solid PC where the compliant matrix has a constant ET and the inclusion phase is stiff enough so that its ET is deemed to remain constant during deformation.
Get PriceModelling plastic deformation in a single-crystal nickel
Nov 15 2016 · The crystal plasticity was applied to study creep (Zhao et al. 2006) fatigue (Kiyak et al. 2008) thermal-mechanical fatigue (Shenoy et al. 2005) indentation (Zambaldi et al. 2007) and gradient-dependent deformation (Meissonnier et al. 2001) of single crystal nickel superalloys.
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Apr 13 2020 · The constitutive framework was based on the large‐deformation rate‐dependent CP theory. 9 20 The total deformation gradient F is decomposed into two multiplicative components which are the elastic part (F e) whereas the plastic deformation in the single crystals is only caused by the shear flow along crystalline slip systems. The
Get PriceGradient-Dependent Deformation of Two-phase Single
In this work a gradient- and rate-dependent crystallographic formulation is proposed to investigate the macroscopic behaviour of two-phase single crystals.
Get PriceDeformation mechanismWikipedia
Deformation mechanisms are commonly characterized as brittle ductile and brittle-ductile.The driving mechanism responsible is a subject of interplay between internal (e.g composition grain size and lattice-preferred orientation) and external (e.g temperature and fluid pressure) factors. These mechanisms produce a range of micro-structures studied in rocks to constrain the conditions
Get PriceGradient-dependent deformation of two-phase single crystals
Abstract In this work a gradient- and rate-dependent crystallographic formulation is proposed to investigate the macroscopic behaviour of two-phase single crystals.
Get PriceModelling plastic deformation in a single-crystal nickel
Modelling plastic deformation in a single-crystal nickel-based superalloy using the precipitate phase that ranges between 40 and 70 . and gradient-dependent deformation (Meissonnier et al
Get PriceMicromechanical Analysis for Two-Phase Copper-Silver
two cold-drawn Cu-Ag composites with different drawing strains and to obtain the field (deformation gradient and stress) distributions in the composite. Both metals (Cu or Ag) are rate-dependent crystal plasticity material constituents. HFGMC is applied for studying the deformation behavior of two-phase Cu-Ag composites under uniaxial compression.
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Dec 28 2009 · Experimental and crystal plasticity studies of deformation and crack nucleation in a titanium alloy Show all authors Wilkinson A. J. Anisotropy in the plastic flow properties of single crystal alpha titanium determined from micro cantilever beams O Dowd N. P. Gradient-dependent deformation of two-phase single crystals J. Mechanics
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High Gradient Solidification Single Crystals. Low Gradient Time for Deviation from 001 170 Creep 145 Temperature 900 1000 1050 HIP ed Stress (MP a) 380 240 Time for 170 Creep 144 160 Elongation Rupture Life 1138 266 Life 664 484 939 15 .
Get PriceSoft phononic crystals with deformation-independent band
Three types of two-phase designs are proposed (i) a solid–solid PC with constant ET for both phases (ii) a solid–void PC with constant ET for the matrix phase (iii) a solid–solid PC where the compliant matrix has a constant ET and the inclusion phase is stiff enough so that its ET is deemed to remain constant during deformation.
Get PriceA systematic study of hcp crystal orientation and
Mar 13 2007 · Elastically anisotropic physically based length-scale- and rate-dependent crystal plasticity finite element investigations of a model hcp polycrystal are presented and a systematic study was carried out on the effects of combinations of crystallographic orientations on local grain-level stresses and accumulated slip in cycles containing cold dwell.
Get PriceAn FFT based strain gradient crystal plasticity study of
An FFT based strain gradient crystal plasticity study of grain boundaries "Gradient-dependent deformation of two-phase single crystals" J. Mech. Phy. Solids 48 (2000). 2 P. Eisenlohr M. Diehl R.A. Lebensohn and F. Roters "A spectral method solution to crystal
Get PriceSimulation of Torsion of Thin FCC Single Crystal Wires by
The size effects observed in the torsion of thin FCC single crystal wires is modelled by the employment of mechanism-based strain gradient crystal plasticity (MSG-CP). In the formulation the total slip resistance in each active slip system is assumed to be due to a mixed population of forest obstacles arising from both statistically stored and geometrically necessary dislocations.
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Displacive deformation via dislocation slip and deformation twinning usually plays a dominant role in the plasticity of crystalline solids at room temperature. Here we report in situ quantitative
Get PriceGradient-dependent deformation of two-phase single
Nov 01 2000 · Gradient-dependent deformation of two-phase single crystals 1. Introduction. A major factor contributing to the formation of microcracks or damage in single crystals strengthened 2. Characteristic length scales in two-phase single crystals. The microstructure of single crystals
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Oct 12 2018 · Because of the aforementioned unique GSFE the γ-TiAl crystals deform differently from the FCC crystals. According to previous experimental studies 5 11 13 plastic deformation of bulk single
Get PriceModelling of cyclic plasticity and crack-tip deformation
Both crystal plasticity theory and DDD method have been employed to investigate the mechanical behaviour of nickel-based superalloys. The crystal plasticity theory has been applied to study creep fatigue thermal-mechanical fatigueindentation deformation and gradient-dependent deformation of single crystalnickel superalloys.
Get PriceGradient crystal plasticity modelling of anelastic effects
Mar 11 2014 · It is now a well known phenomenon that thin films are susceptible to size effects which can be captured adequately by gradient plasticity theories. Besides the scale dependency metal thin films also exhibit time dependent behavior anelasticity (deformation recovery over time following elastic spring back upon load removal) and creep (permanent deformation developed over time at constant
Get PriceConstitutive modelling of anisotropic creep deformation in
2. Lack of test data. 3. Limited knowledge of deformation mechanisms and therefore the phenomena that need to be included in a successful model.The development of constitutive models to describe deformation of two phase superalloy single crystal generally falls into one of three categories.
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