Phase-specific residual stresses induced by deep drawing of lean duplex steel: measurement vs. simulation

Simon, Nicola; Erdle, Hannes; Walzer, Stefan; Gibmeier, Jens; Böhlke, Thomas; Liewald, Mathias

doi:10.1007/s11740-019-00877-4

Cited by 10 publications

(13 citation statements)

References 19 publications

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“…In this section, three states of duplex steel are considered. Fully isotropic duplex steel with uniform ODFs in both phases is contrasted with duplex steel whose texture has been measured using X-ray diffraction as described by Simon et al [20]. As the most complex model of the material, a composite with both measured texture data and plastic strain distributions obtained from full-field simulations is considered.…”

Section: General Setupmentioning

confidence: 99%

“…3.2. Texture data measured via X-ray diffraction as described by Simon et al [20] are used to define the orientations of the single crystals. The single crystal stiffness data are as described in Table 1.…”

Section: Textured Duplex Steelmentioning

confidence: 99%

“…The models are fit to the results of Simon et al [21]. Again, the texture data of Simon et al [20] is used. A compressive strain of 3% is applied in the direction normal to the rolling, while the other directions are stress-free.…”

Section: Rolled Duplex Steelmentioning

confidence: 99%

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Stochastic evaluation of stress and strain distributions in duplex steel

Krause

Böhlke

2021

Arch Appl Mech

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Austenite–ferrite duplex steels generally consist of two differently textured polycrystalline phases with different glide mechanisms. For estimating the effective mechanical behavior of heterogeneous materials, there exist well established approaches, two of which are the classes of mean-field and full-field methods. In this work, the local fields resulting from these different approaches are compared using analytical calculations and full-field simulations. Duplex steels of various textures measured using X-ray diffraction are considered. Special emphasis is given to the influence of the crystallographic texture on the stress and strain distributions.

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Section: General Setupmentioning

confidence: 99%

Section: Textured Duplex Steelmentioning

confidence: 99%

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Stochastic evaluation of stress and strain distributions in duplex steel

Krause

Böhlke

2021

Arch Appl Mech

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“…In both the measurement as well as simulation of residual stresses, it is usually assumed that geometrical symmetries lead to symmetrical residual stress states, i.e., there should be no dependency from the measurement position [11]. Therefore, if results of various different measurement positions are compared, one would expect different residual stress states due to different degrees of deformation [12]. Research showed the assumption of a homogenous stress state was not valid for rotary swaging [8].…”

Section: State Of the Artmentioning

confidence: 99%

Statistical analysis of the reproducibility of residual stress measurements in cold extruded parts

et al. 2021

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Cold extruded components are characterized by residual stresses, which originate from the experienced manufacturing process. For industrial applications, reproducibility and homogeneity of the final components are key aspects for an optimized quality control. Although striving to obtain identical deformation and surface conditions, fluctuation in the manufacturing parameters and contact shear conditions during the forming process may lead to variations of the spatial residual stress distribution in the final product. This could lead to a dependency of the residual stress measurement results on the relative axial and circumferential position on the sample. An attempt to examine this problem is made by the employment of design of experiments (DoE) methods. A statistical analysis of the residual stress results generated through X-Ray diffraction is performed. Additionally, the ability of cold extrusion processes to generate uniform stress states is analyzed on specimens of austenitic stainless steel 1.4404 and possible correlations with the pre-deformed condition are statistically examined. Moreover, the influence of the coating, consisting of oxalate and a MoS2 based lubricant, on the X-Ray diffraction measurements of the surface is investigated.

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“…In sheet metal forming, multiphase materials, such as dual phase and duplex stainless steels are frequently used since they perfectly meet the requirements for deep drawn components, that is, these materials combine high strength and good ductility and in case of the duplex stainless steels K Fig. 2 Microstructure of cold rolled X2CrNiN23-4 sheets for planar section (left), longitudinal cross section (centre) and transverse cross section (right): ferrite (bright phase) and austenite (dark phase) [9] Fig. 3 Anisotropy of the cold rolled X2CrNiN23-4 sheet: crystallographic texture given by inverse pole figures for the phases austenite and ferrite, referred to the sheet normal direction (left) and macroscopic anisotropy given by tensile tests for three orientations in plane including the Ludwik-Hollomon approximation of the strain hardening used for numerical simulation (right) they exhibit a very good corrosion resistance.…”

Section: Introductionmentioning

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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Phase-specific residual stresses induced by deep drawing of lean duplex steel: measurement vs. simulation

Cited by 10 publications

References 19 publications

Stochastic evaluation of stress and strain distributions in duplex steel

Stochastic evaluation of stress and strain distributions in duplex steel

Statistical analysis of the reproducibility of residual stress measurements in cold extruded parts

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

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