On the influence of crystal elastic moduli on computed lattice strains in AA-5182 following plastic straining

Dawson, Paul R.; Boyce, Donald E.; MacEwen, S.R.; Rogge, R. B.

doi:10.1016/s0921-5093(01)00967-4

Cited by 77 publications

(47 citation statements)

References 16 publications

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“…Full field polycrystal models have been formulated using fast Fourier transform techniques for materials with periodic microstructure, which have been employed for lattice strain predictions (see, e.g., [25,26]). More commonly, finite element (FE) methods have been used to complement in-situ ND observations, with either simplified grain topology [7,8,12,20,22] or complex/realistic geometries [19,[27][28][29][30] taken into account. As shown in a recent work [29], an accurate prediction of lattice strain evolution can be achieved using a microstructure-based FE model for austenitic stainless steels.…”

Section: Introductionmentioning

confidence: 99%

The effect of prior deformation on subsequent microplasticity and damage evolution in an austenitic stainless steel at elevated temperature

Li¹,

Davies²,

Zhang³

et al. 2013

Acta Materialia

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The micromechanical deformation of an austenitic stainless steel under uniaxial tension at elevated temperature (550 • C) following room temperature compression has been examined in this work. The study combines micromechanical finite element modelling and in-situ neutron diffraction measurements. Overall, good agreement has been achieved between the measured and simulated stress versus lattice strain response, when prestrain is accounted for. The results indicate that the introduction of prestrain can significantly influence subsequent microscale deformation and damage development associated with microplasticity and that an appropriate representation of strain history can improve the predictive accuracy at the microscale for a polycrystalline material.

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Section: Introductionmentioning

confidence: 99%

The effect of prior deformation on subsequent microplasticity and damage evolution in an austenitic stainless steel at elevated temperature

Li¹,

Davies²,

Zhang³

et al. 2013

Acta Materialia

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“…The first factor belongs to the intrinsic properties of the material, while the last two are extrinsic factors, both of which exert influence on the geometry of dislocation slips. The lattice strain evolutions of face-centered cubic (fcc) materials with random orientations or with weak texture during uniaxial tension were investigated by several researchers [9][10][11][12][13][14][15]. In the elastic region, elastic anisotropy, which is expressed by 2C 44 /(C 11 -C 12 ), plays an important role in lattice strain evolution [9,10,11].…”

Section: E-mail Address: Zhengyezhong@hzgde (Z Y Zhong)mentioning

confidence: 99%

“…In the elastic region, elastic anisotropy, which is expressed by 2C 44 /(C 11 -C 12 ), plays an important role in lattice strain evolution [9,10,11]. However, the ratio of Young's moduli E 111 /E 200 in a polycrystalline material may be different from that calculated by the Kröner model, because of the interactions with neighboring crystallites, resulting in different lattice plane dependent stress-strain behavior [12]. Furthermore, the measured lattice strains of individual lattice planes imply that the E 111 is not the largest one in a textured polycrystalline copper, even though the E 111 is the largest one in copper with random orientations [13].…”

Section: E-mail Address: Zhengyezhong@hzgde (Z Y Zhong)mentioning

confidence: 99%

In-situ investigation of the anisotropic mechanical behavior of rolled AA 7020-T6 alloy through lattice strain evolution during uniaxial tension

Zhong

Brokmeier

Maawad

et al. 2015

Materials Science and Engineering: A

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The texture-induced anisotropic mechanical behavior of a highly textured AA 7020-T6 (maximum orientation density of 29.7 multiple random distribution), was characterized by the lattice strain evolution along rolling direction (RD), 45° to RD and 90° to RD, respectively, under uniaxial tension using high energy X-ray diffraction. The uniaxial tensile tests were done till ultimate tensile strength (UTS), which show different yield strengths (YS), UTS and elongations along the three directions on a macroscopic level. On micromechanical level, the lattice strain evolution explains the correlation between crystallite orientation and different mechanical behavior, leading to the macroscopic anisotropy. In the elastic region, the sample 45° to RD has the lowest lattice plane dependent Young's modulus compared to the other two directions. In the elastic plastic transition region, lattice strain differences among different {hkl} lattice planes are highest for sample 45° to RD and lowest for sample 0° to RD. Moreover, the 45° to RD sample has the lowest lattice dependent YS. In the plastic region, the work hardening behavior of different {hkl} lattice planes in all three directions can be divided into two groups, corresponding to two types of dislocation combinations. However, {200} planes of samples 45° and 90° to RD behave abnormally due to the stress along <110> of the {200} planes and the orientation density of {200} planes parallel and perpendicular to the loading direction (LD).

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“…At specified load increments during the deformation (400MPa, 800MPa, & 1200MPa), the specimen was unloaded by 10%-to minimize material evolution due to creep [20]-while high-energy diffraction measurements were performed. The measurements involved rotating the specimen and taking multiple diffraction images, necessitating the 10% unloading as the measurements took approximately 1 hour of collection time.…”

Section: Lattice Strain Pole Figure (Spf) Experiments On Lshrmentioning

confidence: 99%

Two Integrated Experimental and Modeling Approaches to Study Strain Distributions in Nickel and Nickel-base Superalloy Polycrystals

Turner¹,

Shade²,

Schuren³

et al. 2012

Superalloys 2012 (Twelfth International Symposium)

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This work presents two integrated experimental and modeling approaches for examining polycrystals at different length scales, which utilize different experimental techniques but the same elasto-crystal plasticity based finite element model (CPFEM). The goal of this work is to calibrate modeling approaches through experimental data, and then use the models to gain insight into the mechanics of deformation in nickel and nickel-base superalloy polycrystals. The first study utilized a micro-tensile test specimen of pure nickel with 259 grains, where the CPFEM simulations were initiated with the explicit 3D microstructure as measured with 3D-Electron Back Scattering Detection (EBSD) serial sectioning and compared with surface deformations measured with Digital Image Correlation (DIC). The second study utilized a larger polycrystalline nickel-base superalloy specimen with approximately 50,000 grains, where the CPFEM simulation results are compared with lattice strain data obtained through high energy x-ray diffraction utilizing a synchrotron x-ray source. In both cases the simulations are compared with different aspects of the experimental strain information (surface strain or lattice strain), and then the simulations are used to explore aspects of the heterogeneous nature of the deformation that are difficult or impossible to measure experimentally.

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On the influence of crystal elastic moduli on computed lattice strains in AA-5182 following plastic straining

Cited by 77 publications

References 16 publications

The effect of prior deformation on subsequent microplasticity and damage evolution in an austenitic stainless steel at elevated temperature

The effect of prior deformation on subsequent microplasticity and damage evolution in an austenitic stainless steel at elevated temperature

In-situ investigation of the anisotropic mechanical behavior of rolled AA 7020-T6 alloy through lattice strain evolution during uniaxial tension

Two Integrated Experimental and Modeling Approaches to Study Strain Distributions in Nickel and Nickel-base Superalloy Polycrystals

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