The Evaluation of the Distribution of Residual Stresses of the I. Kind (RS I) and of the II. Kind (RS II) in Textured Materials

Hauk, Viktor; Nikolin, Hans-Joachim

doi:10.1155/tsm.8-9.693

Cited by 28 publications

(5 citation statements)

References 12 publications

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“…As σ 33 α,γ cannot be determined without knowledge of the precise lattice parameters for the stress-free condition a α,γ 0 , in this work σ 33 α,γ = 0 is assumed, which is justified due to the limited information depth of 5 µm for CrKα radiation in steel. The macro RS σ ϕ and phase-specific stresses of second kind σ I I ϕ α,γ are calculated from determined phase-specific stresses σ ϕ α,γ and the phase volume fraction c α,γ according to the following equations [17].…”

Section: Experimental Methodsmentioning

confidence: 99%

Phase-Specific Strain Hardening and Load Partitioning of Cold Rolled Duplex Stainless Steel X2CrNiN23-4

et al. 2020

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Multi-phase materials often times consist of constituents with high contrasts in phase-specific mechanical properties. Here, even after homogeneous plastic deformation phase-specific residual stresses develop that may affect the components behaviour in service. For numerical simulation of phase-specific residual stresses, knowledge of the particular phase-specific strain hardening behaviour is essential. In this study, the strain hardening of ferrite and austenite in cold rolled duplex stainless steel of type X2CrNiN23-4 is investigated. By means of X-ray diffraction, the phase-specific load partitioning and residual stress evolution are analysed for uniaxial load application in three directions within the sheets plane, taking into account the sheet metals phase specific anisotropy. In order to assess the necessity for experimental determination of anisotropic phase specific behaviour, the strain hardening parameters, derived from only one loading direction, are implemented in a mean-field approach for prediction of phase-specific stresses. A simplified simulation approach is applied that only considers macroscopic plastic anisotropy and results are compared to experimental findings. For all investigated loading directions, it was observed that austenite is the high-strength phase. This load partitioning behaviour was confirmed by the evolution of phase-specific residual stresses as a result of uniaxial elasto-plastic loading. With the simplified and fast numerical approach, satisfying results for prediction of anisotropic phase-specific (residual) stresses are obtained.

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Section: Experimental Methodsmentioning

confidence: 99%

Phase-Specific Strain Hardening and Load Partitioning of Cold Rolled Duplex Stainless Steel X2CrNiN23-4

et al. 2020

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“…The method of measuring the lattice strain in especially oriented groups of crystallites (see e.g. Hauk and Nikolin, 1988) was also used to monitor the variation in deviatoric stress component ( 11 -33 ) across the weld in both the test-piece and the reference specimen. Based on the results of texture examination presented above, the additional measurements were made at an orientation angle, , of 30 and 60 (see Fig.…”

Section: Methodsmentioning

confidence: 99%

Full Stress Tensor Determination in A textured Aerospace Aluminium Alloy Plate Using synchrotron X‐Ray Diffraction

Stelmukh

Edwards

Ganguly

2003

Texture, Stress, and Microstructure

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Triaxial strain scanning has been performed on a 7mm thick 7150-aluminium alloy Variable Polarity Plasma Arc (VPPA) weld using synchrotron X-rays. It has been demonstrated that the use of specific advantageous (hkl) peaks that occur in this highly textured aerospace alloy plate permits fast deep measurements in reflection as well as in transmission. The sin⁡2ψ method was also utilised to monitor the variation in deviatoric stress component (σ11−σ33) across the weld in both the test-piece and a comb like reference specimen used to map the changes in stress-free lattice spacings over the weld. The results suggest that microstresses have little effect on macrostress determination, particularly in the Heat Affected Zones (HAZ). Though small in magnitude, the macrostresses still present in the reference specimen can be allowed for to correct the stress tensor in the plate. Maximum tensile longitudinal stress values remain unchanged, whereas the stress condition in some parts of the HAZ is well described as biaxial after the proposed correction.

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“…For all measuring points, the residual stress components in circumferential direction (CD) and drawing direction (DD) were analyzed for both phases h CD,DD i˛; . From these phasespecific stresses, the macro residual stresses CD,DD and phase-specific micro residual stresses˝ II CD,DD˛˛; were calculated under consideration of the phase volume fraction c˛; using the following equations [16]:…”

Section: Experimental Residual Stress Analysismentioning

confidence: 99%

Residual stresses in deep-drawn cups made of duplex stainless steel X2CrNiN23-4

Simon

Erdle

Walzer

et al. 2021

Forsch Ingenieurwes

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Residual stress development in deep drawing processes is investigated based on cylindrical cups made of duplex stainless steel sheet. Using a two-scale approach combining finite element modelling with a mean field homogenization scheme the macro residual stresses as well as the phase-specific micro residual stresses regarding the phases ferrite and austenite are calculated for steel X2CrNiN23‑4 for various drawing depths. The simulation approach allows for the numerical efficient prediction of the macro and phase-specific micro residual stress in every integration point of the entire component. The simulation results are validated by means of X‑ray diffraction residual stress analysis applied to a deep-drawn cup manufactured using corresponding process parameters. The results clearly indicate that the fast simulation approach is well suited for the numerical prediction of residual stresses induced by deep drawing for the two-phase duplex steel; the numerical results are in good agreement with the experimental data. Regarding the investigated process, a significant influence of the drawing depth, in particular on the evolution of the residual stress distribution in drawing direction, is observed. Considering the appropriate phase-specific strain hardening, the two-scale approach is also well suited for the prediction of phase specific residual stresses on the component level.

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The Evaluation of the Distribution of Residual Stresses of the I. Kind (RS I) and of the II. Kind (RS II) in Textured Materials

Cited by 28 publications

References 12 publications

Phase-Specific Strain Hardening and Load Partitioning of Cold Rolled Duplex Stainless Steel X2CrNiN23-4

Phase-Specific Strain Hardening and Load Partitioning of Cold Rolled Duplex Stainless Steel X2CrNiN23-4

Full Stress Tensor Determination in A textured Aerospace Aluminium Alloy Plate Using synchrotron X‐Ray Diffraction

Residual stresses in deep-drawn cups made of duplex stainless steel X2CrNiN23-4

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