Influence of microscopic strain heterogeneity on the formability of martensitic stainless steel

Bettanini, Alvise Miotti; Delannay, Laurent; Jacques, Pascal; Pardoen, Thomas; Badinier, Guillaume; Mithieux, Jean‐Denis

doi:10.1063/1.5007967

Cited by 3 publications

(2 citation statements)

References 21 publications

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“…Therefore, the obtained results contradict the supposition that formation of strain-induced martensite is a merely monotonic function of stress triaxiality. However, the findings in Figure 4 are confirmed by the experimental results of DeMania [13] who reported that less martensite is produced under plane strain tension than under uniaxial tension. DeMania suggested that geometrical constrains in plane strain tension causes less formation of shear band intersections in comparison with uniaxial tension.…”

Section: Resultssupporting

confidence: 80%

“…Based on the Stringfellow model, the rate of martensite formation is a monotonic function of the stress triaxiality. However, much experimental data [10,[13][14][15][16][17] reveal that transformation rate of martensite is not merely dependent on the stress triaxiality. Lebedev and Kosarchuk [14,15] suggested that phase transformation is controlled by stress triaxiality and Lode parameter.…”

Section: Introductionmentioning

confidence: 99%

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Modification of Olson–Cohen model for predicting stress-state dependency of martensitic transformation

Mansourinejad

Ketabchi

2017

Materials Science and Technology

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The well-known Olson–Cohen model is modified by incorporating the effect of stress state on the transformation kinetics in metastable austenitic stainless steels. By assuming isothermal condition, the relationships between the parameters of Olson–Cohen model, stress triaxiality and absolute value of Lode angle parameter have been established. The proposed model predicts that the saturation level and slope of transformation curve increase with increasing the stress triaxiality in addition to the absolute value of Lode angle parameter. Uniaxial and plane strain tension tests have been conducted on the two types of austenitic stainless steels AISI 304 and AISI 201 to evaluate the validity of the model. The results show that the predicted transformation curves are in good agreement with the experimental data.

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Section: Resultssupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Modification of Olson–Cohen model for predicting stress-state dependency of martensitic transformation

Mansourinejad

Ketabchi

2017

Materials Science and Technology

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Residual ferrite in martensitic stainless steels: The effect of mechanical strength contrast on ductility

Bettanini

Hannard

Mithieux³

et al. 2018

Materials Science and Engineering: A

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Reduced partitioning of plastic strain for strong and yet ductile precipitate-strengthened alloys

Jones

Gioacchino

Lim

et al. 2018

Sci Rep

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When a material that contains precipitates is deformed, the precipitates and the matrix may strain plastically by different amounts causing stresses to build up at the precipitate-matrix interfaces. If premature failure is to be avoided, it is therefore essential to reduce the difference in the plastic strain between the two phases. Here, we conduct nanoscale digital image correlation to measure a new variable that quantifies this plastic strain difference and show how its value can be used to estimate the associated interfacial stresses, which are found to be approximately three times greater in an Fe-Ni2AlTi steel than in the more ductile Ni-based superalloy CMSX-4®. It is then demonstrated that decreasing these stresses significantly improves the ability of the Fe-Ni2AlTi microstructure to deform under tensile loads without loss in strength.

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Influence of microscopic strain heterogeneity on the formability of martensitic stainless steel

Cited by 3 publications

References 21 publications

Modification of Olson–Cohen model for predicting stress-state dependency of martensitic transformation

Modification of Olson–Cohen model for predicting stress-state dependency of martensitic transformation

Residual ferrite in martensitic stainless steels: The effect of mechanical strength contrast on ductility

Reduced partitioning of plastic strain for strong and yet ductile precipitate-strengthened alloys

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