Competing mechanisms and modeling of deformation in austenitic stainless steel single crystals with and without nitrogen

Караман, И.; Şehitoğlu, Hüseyin; Maier, Hans Jürgen; Chumlyakov, Yuriy

doi:10.1016/s1359-6454(01)00296-8

Cited by 197 publications

(91 citation statements)

References 30 publications

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“…It has been reported several times that increasing the ISFE of an austenitic alloy, by means of either the chemical composition or the test temperature, changes the deformation mode of the alloy, [13,15,20,36] as is shown schematically in Figure 12. This is in agreement with the results currently presented, because the low ISFE low Cr alloy deforms by strain-induced c fi e fi a¢ martensitic transformation and the higher ISFE high Cr alloy deforms by mechanical twinning.…”

Section: Discussionmentioning

confidence: 99%

“…Other authors [18][19][20][21] found an increased ISFE with increasing N content. Yakubtsov et al [18,19] determined the stacking fault probability (SFP) for an Fe-8Mn-18Cr-10Ni alloy.…”

Section: Introductionmentioning

confidence: 86%

“…Further adding N up to 0.33 mass pct leads to an increase in SFP to 0.028, corresponding to a decreased ISFE. Karaman et al [20] and Gavriljuk et al [21] found that, in a Fe-24Mn-6Si-5Cr shape memory alloy, the ISFE increased when N was added up to 0.4 mass pct. Wan et al [22] calculated that the ISFE increases when maximum 0.25 mass pct of N is added.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Influence of Cr and N Additions on the Mechanical Properties of FeMnC Steels

Bracke¹,

Penning

Akdut

2007

Metall Mater Trans A

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The influence of Cr and N additions on the mechanical properties of austenitic Fe-Mn-Cr-C-N alloys was studied. The ductility and the strain-hardening behavior were investigated in detail, because these alloys may potentially be used for crash-relevant automotive body parts. It was found that Cr and low N additions to a Fe-18Mn-0.25C alloy resulted in a higher ductility and a reduced strain hardening. Increasing the N content up to 0.22 mass pct resulted in a further increase of ductility and a more favorable strain-hardening behavior. X-ray diffraction and transmission electron microscopy studies revealed that the strain-hardening behavior was linked to the presence of strain-induced martensite and mechanical twinning. The analysis of the mechanical properties and the microstructure clearly demonstrates that, in the Fe-Mn-Cr-C-N system, both N additions and combined N and Cr additions increase the stacking fault energy.

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Section: Discussionmentioning

confidence: 99%

“…Other authors [18][19][20][21] found an increased ISFE with increasing N content. Yakubtsov et al [18,19] determined the stacking fault probability (SFP) for an Fe-8Mn-18Cr-10Ni alloy.…”

Section: Introductionmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Influence of Cr and N Additions on the Mechanical Properties of FeMnC Steels

Bracke¹,

Penning

Akdut

2007

Metall Mater Trans A

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“…The feasibility of the approach is furthermore expanded by identifying an FE model of the representative volume element (RVE) of the microstructure, which is computationally inexpensive and, in this respect, comparable to single crystalline FE models. The identification of the parameters is performed with respect to tensile test measurements on AISI 316L austenitic stainless steel obtained from the literature: single-crystal measurements at 22 • C for the three tensile directions [001], [111] and [123] were published in [30] and polycrystal measurements for different average grain sizes at 24 • C in [31]. Finally, a simple upgrade of the hardening model is proposed to include the length scale in the conventional CP model.…”

Section: Introductionmentioning

confidence: 99%

Combining Single- and Poly-Crystalline Measurements for Identification of Crystal Plasticity Parameters: Application to Austenitic Stainless Steel

Shawish

Cizelj

2017

Crystals

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Abstract:Crystal plasticity finite element models have been extensively used to simulate various aspects of polycrystalline deformations. A common weakness of practically all models lies in a relatively large number of constitutive modeling parameters that, in principle, would require dedicated measurements on proper length scales in order to perform reliable model calibration. It is important to realize that the obtained data at different scales should be properly accounted for in the models. In this work, a two-scale calibration procedure is proposed to identify (conventional) crystal plasticity model parameters on a grain scale from tensile test experiments performed on both single crystals and polycrystals. The need for proper adjustment of the polycrystalline tensile data is emphasized and demonstrated by subtracting the length scale effect, originating due to grain boundary strengthening, following the Hall-Petch relation. A small but representative volume element model of the microstructure is identified for fast and reliable identification of modeling parameters. Finally, a simple hardening model upgrade is proposed to incorporate the grain size effects in conventional crystal plasticity. The calibration strategy is demonstrated on tensile test measurements on 316L austenitic stainless steel obtained from the literature.

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“…On the other hand, the self-consistent models prove to be effective in describing the anisotropic micromechanical behaviors of single-phase materials during elastic and plastic deformation. [9,10] For twophase materials, however, the interactions of grain-tograin and phase-to-phase may occur simultaneously during deformation, which requires a complicated model for describing the micromechanical behavior. [11][12][13] In the present work, based on time-of-flight (TOF) neutron diffraction experiments, different lattice strains in an austenite-ferrite (c-a) stainless steel, SAF 2507, during uniaxial tensile deformation were measured.…”

Section: Introductionmentioning

confidence: 99%

Tensile Deformation Behavior of Duplex Stainless Steel Studied by In-Situ Time-of-Flight Neutron Diffraction

Jia

Peng

Brown

et al. 2008

Metall Mater Trans A

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For a duplex alloy being subjected to deformation, the different mechanical behaviors of its constituent phases may lead to a nonuniform partition of stresses between phases. In addition, the grain-orientation-dependent elastic/plastic anisotropy in each phase may cause grain-tograin interactions, which further modify the microscopic load partitioning between phases. In the current work, neutron diffraction experiments on the spectrometer for materials research at temperature and stress (SMARTS) were performed on an austenite-ferrite stainless steel for tracing the evolution of various microstresses during tensile loading, with particular emphasis on the load sharing among grains with different crystallographic orientations. The anisotropic elastic/plastic properties of the duplex steel were simulated using a visco-plastic self-consistent (VPSC) model that can predict the phase stress and the grain-orientation-dependent stress. Material parameters used for describing the constitutive laws of each phase were determined from the measured lattice strain distributions for different diffraction {hkl} planes as well as the laboratorial macroscopic stress-strain curve of the duplex steel. The present investigations provide in-depth understanding of the anisotropic micromechanical behavior of the duplex steel during tensile deformation.

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Competing mechanisms and modeling of deformation in austenitic stainless steel single crystals with and without nitrogen

Cited by 197 publications

References 30 publications

The Influence of Cr and N Additions on the Mechanical Properties of FeMnC Steels

The Influence of Cr and N Additions on the Mechanical Properties of FeMnC Steels

Combining Single- and Poly-Crystalline Measurements for Identification of Crystal Plasticity Parameters: Application to Austenitic Stainless Steel

Tensile Deformation Behavior of Duplex Stainless Steel Studied by In-Situ Time-of-Flight Neutron Diffraction

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