Constitutive and numerical modeling of coupled dissipative phenomena in 316L stainless steel at cryogenic temperatures

Egner, Halina; Skoczen, B.; Ryś, Maciej

doi:10.1016/j.ijplas.2014.08.005

Cited by 26 publications

(14 citation statements)

References 63 publications

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“…As reported by FISHER 15 , martensite nucleation occurs heterogeneously due to residual stress fields in the vicinity of the mismatches. Microstructural heterogeneity of this phase transformation is also reported by EGNER 16 . AMAR 12 and NAGY 17 which observed that the volume fraction of martensite was a function of sample thickness.…”

Section: Resultssupporting

confidence: 69%

Mechanically Induced Martensitic Transformation of Hot Rolled and Annealed 304L Austenitic Stainless Steel at Room and Cryogenic Temperatures

2019

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The 304L austenitic stainless steel is susceptible to mechanically induced martensitic transformation from slightly above room temperature down to cryogenic temperatures. In this work, austenitic 304L steel produced by two different thermomechanical processes, hot rolling (HR) and cold rolling and annealing (CR/A), were subjected to martensitic transformation by rolling and by tensile tests at 298 K and 155 K and the volume fraction of martensite was determined by X-ray diffraction and ferritescope measurements. The results showed that the martensitic transformation was complete for CR/A samples rolled at 155 K and that the volume fraction of martensite was larger in CR/A samples than in HR samples in all cases.

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Section: Resultssupporting

confidence: 69%

Mechanically Induced Martensitic Transformation of Hot Rolled and Annealed 304L Austenitic Stainless Steel at Room and Cryogenic Temperatures

2019

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“…Later on, Egner and Skoczen´(2010) extended Garion and Skoczen´(2003) model, and proposed separate tensorial variables for damage in austenite and martensite. Finally, Egner et al (2015) formulated a thermodynamically consistent constitutive model. Tensorial damage variables were assumed for both phases under assumption that the martensite undergoes brittle and the austenite ductile damage.…”

Section: Constitutive Models Describing Phase Transformationmentioning

confidence: 99%

Damage evolution in a stainless steel bar undergoing phase transformation under torsion at cryogenic temperatures

Ortwein¹,

Ryś

Skoczen

2016

International Journal of Damage Mechanics

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Phase transformation driven by plastic strains is commonly observed in austenitic stainless steels. In the present paper, this phenomenon is addressed in connection with damage evolution. A three-dimensional constitutive model has been derived, and scalar variables for damage and the volume fraction of the transformed phase were used. The model was solved using Abaqus UMAT user defined procedure, as well as by means of simplified one-dimensional approach for a twisted circular bar. Large experimental campaign of tests was performed, including martensite content measurements within the cross-section and on the surface of the bar during monotonic and cyclic loading. Based on the residual angle of twist, damage variable was calculated. The global response of torque versus the angle of twist was measured as well. Comparison between the experimental results and the results obtained from the simplified one-dimensional approach and from the full three-dimensional approach are presented. It turns out that one-dimensional formulation agrees quite well with full three-dimensional model. Thus, much simpler approach can effectively be used. Moreover, experimental results agree well in terms of the martensite content evolution and relation: torque versus the angle of twist. Damage evolution is correctly predicted in terms of the maximum values. Lastly, the evolution of damage during cyclic torsion is discussed, as the experimental results indicate rather surprising effect of unloading modulus recovery after each reversion of twist direction.

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“…For a multiphase material, different damage mechanisms (ductile or/and brittle) may be observed in material phases, therefore several separate damage variables may have to be used (cf. Egner et al, 2015a; see Table 2). It has been also shown that entropy production can be used as a damage metrics (cf.…”

Section: Introductionmentioning

confidence: 99%

Total energy equivalence in constitutive modeling of multidissipative materials

Egner

Ryś

2016

International Journal of Damage Mechanics

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In the present work, the total energy equivalence hypothesis was applied in constitutive modeling of engineering materials. The approach originally developed for damaged materials, was extended to modeling not only damage but also other dissipative phenomena, like phase transformation, in a consistent manner. The proposed model was examined by means of parametric studies to show its ability to reflect different experimentally observed features of real materials.

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Constitutive and numerical modeling of coupled dissipative phenomena in 316L stainless steel at cryogenic temperatures

Cited by 26 publications

References 63 publications

Mechanically Induced Martensitic Transformation of Hot Rolled and Annealed 304L Austenitic Stainless Steel at Room and Cryogenic Temperatures

Mechanically Induced Martensitic Transformation of Hot Rolled and Annealed 304L Austenitic Stainless Steel at Room and Cryogenic Temperatures

Damage evolution in a stainless steel bar undergoing phase transformation under torsion at cryogenic temperatures

Total energy equivalence in constitutive modeling of multidissipative materials

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