Characterization of phase properties and deformation in ferritic-austenitic duplex stainless steels by nanoindentation and finite element method

Schwarm, Samuel C.; Kolli, R. Prakash; Aydoğan, Eda; Mburu, Sarah; Ankem, Sreeramamurthy

doi:10.1016/j.msea.2016.10.116

Cited by 39 publications

(20 citation statements)

References 35 publications

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“…And call.) for 316 [22], 316L [23], 304 [24] and 304L [23] alloys, as a function of temperature, are plotted for comparison.…”

Section: Resultsmentioning

confidence: 99%

Computational Modelling for Specific Heat and Thermal Conductivity of Austenitic Stainless Steels Alloys at Solid Phase

Mekky¹

2020

RCMA

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This work studied the special effects of the temperature on a number of austenitic stainless steels that are AISI 316, 316L, 304, and 304L Alloys at a solid phase. JMATPRO®, a computer program for modeling of material properties was used to simulate these alloys. The validity of the mathematical model is established by comparing the simulation outcomes with the parallel experimental results. The thermal conductivity and the specific heat of solid-phase fundamentally change with temperature. Calculated specific heat capacity at room temperature agrees very well with Dulong-Petit prediction, but is significantly smaller than those in the literature. It is brought into being that the thermal conductivity and the specific heat basically increase with temperature increases. Generally, the simulation results offered in this study are found to be in good agreement with the experimental results. Thus, the validity and applicability of the JMATPRO® model are established.

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“…And call.) for 316 [22], 316L [23], 304 [24] and 304L [23] alloys, as a function of temperature, are plotted for comparison.…”

Section: Resultsmentioning

confidence: 99%

Computational Modelling for Specific Heat and Thermal Conductivity of Austenitic Stainless Steels Alloys at Solid Phase

Mekky¹

2020

RCMA

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“…The microstructure of the unaged CF-8 steel has a qualitatively similar appearance to that of the CF-3 steel. The ferrite volume percentage is 11.5 ± 1.1 % for the CF-3 steel while that of the CF-8 steel is 9.1 ± 0.9 % as measured by the manual point counting method specified in the ASTM E562-11 standard [37] and [38]. The microstructure observed in this study is consistent with that reported in the literature of a steel with a composition similar to CF-8 and with a ferrite volume percentage of less than 20 % [39], [40].…”

Section: Optical Microscopy: Microstructurementioning

confidence: 99%

Effect of aging temperature on phase decomposition and mechanical properties in cast duplex stainless steels

Mburu

Kolli

Perea

et al. 2017

Materials Science and Engineering: A

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The microstructure and mechanical properties in unaged and thermally aged (at 280 o C, 320 o C, 360 o C, and 400 o C to 4300 h) CF-3 and CF-8 cast duplex stainless steels (CDSS) are investigated. The unaged CF-8 steel has Cr-rich M 23 C 6 carbides located at the δ-ferrite/γaustenite heterophase interfaces that were not observed in the CF-3 steel and this corresponds to a difference in mechanical properties. Both unaged steels exhibit incipient spinodal decomposition into Fe-rich α-domains and Cr-rich α'-domains. During aging, spinodal decomposition progresses and the mean wavelength (MW) and mean amplitude (MA) of the compositional fluctuations increase as a function of aging temperature. Additionally, G-phase precipitates form between the spinodal decomposition domains in CF-3 at 360 o C and 400 o C and in CF-8 at 400 o C. The microstructural evolution is correlated to changes in mechanical properties.

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“…They revealed that the strength of DSS can be increased with work hardening. Schwarm et al [6], investigated the deformation behaviour of the DSS by using nanoindentation and FEM model. They compared different analysis method to determine elastic properties by nanoindentation.…”

Section: Introductionmentioning

confidence: 99%

Effect of phase shape and size on the FEM analysis of indentation test of duplex stainless steel microstructures

Dengiz

Yıldızlı

2020

SN Appl. Sci.

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This study presents the effect of modelling the microstructure of duplex stainless steels with different geometric shapes and sizes on the indentation test results. In this study, an indentation test is modelled on duplex stainless steel (DSS) sheets. The actual and simulated microstructures are modelled with finite element program. Actual microstructure is modelled on SEM image of microstructure. In simulated microstructures, the austenite phase is modelled with four different geometric shapes: circle, small square, big square and triangle. While the indentation depth is found to be 25.80 μm experimentally, an average depth of 22.58 μm is reached in the simulations. Also, the effect of microstructures of different phase ratios on indentation behaviour is investigated. When the austenite ratio increases by 13%, it is observed that the indentation depth increases by 2.1% on average. In summary, the actual and simulated microstructures in different shapes and sizes give similar deformation results.

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Characterization of phase properties and deformation in ferritic-austenitic duplex stainless steels by nanoindentation and finite element method

Cited by 39 publications

References 35 publications

Computational Modelling for Specific Heat and Thermal Conductivity of Austenitic Stainless Steels Alloys at Solid Phase

Computational Modelling for Specific Heat and Thermal Conductivity of Austenitic Stainless Steels Alloys at Solid Phase

Effect of aging temperature on phase decomposition and mechanical properties in cast duplex stainless steels

Effect of phase shape and size on the FEM analysis of indentation test of duplex stainless steel microstructures

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