Research on flow behaviors of the constituent grains in ferrite–martensite dual phase steels based on nanoindentation measurements

Gou, Rui-bin; Dan, W.J.; Zhang, Weigang; Yu, Min

doi:10.1088/2053-1591/aa7d95

Cited by 6 publications

(5 citation statements)

References 34 publications

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“…6(f)). The width of the F-M boundary was approximately 0.25d M , as measured by Ramazani et al [30,32,42], but the layer size could be predicted to be 0.3 d M considering the GnD density of the inner part of each phase. The effects of GnDs (heterogeneous deformation between F and M) on the strain-hardening characteristics of the material are discussed.…”

Section: Parameterssupporting

confidence: 56%

Strain-Hardening Prediction of DP600 Steel Considering the Heterogeneous Deformation Between Ferrite and Martensite

Rui-Bin,

Wen-Jiao,

Yong-Sheng

et al. 2023

Archives of Metallurgy and Materials

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Strain-Hardening Prediction of dP600 Steel conSidering tHe HeterogeneouS deformation Between ferrite and martenSiteDual-phase steels have received extensive attention in autobody frame manufacturing due to the resulting characteristics of an interesting combination of ductile ferrite and hard martensite. Moreover, the ductile ferrite and hard martensite lead to heterogeneous deformation in the boundary between the two phases. Then, geometrically necessary dislocations (GnDs) are created to accommodate a lattice mismatch due to the deformation incompatibility of the boundary in straining. in this study, a new empirical GnD model is developed, in which the GnD density is a function of local plastic deformation; the GnD density is distributed in the phase boundary in accordance with an "S" model of material plastic strain. The boundary conditions are applied to define the parameters. The proposed model is verified with DP600 steel. The effects of the GnDs and the width between ferrite and martensite on the strain hardening of DP600 steel are evaluated.

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Section: Parameterssupporting

confidence: 56%

Strain-Hardening Prediction of DP600 Steel Considering the Heterogeneous Deformation Between Ferrite and Martensite

Rui-Bin,

Wen-Jiao,

Yong-Sheng

et al. 2023

Archives of Metallurgy and Materials

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“…[58] Indents located within 1.5 indent diameters of a boundary were discarded from analysis due to potential effects of neighboring constituents or to strengthening effects from the adjacent phase/boundary, and all other indents located entirely within either ferrite or martensite were used to determine the average ferrite and martensite hardness, respectively. [47]…”

Section: Nanoindentation Hardness Testingmentioning

confidence: 99%

“…[40][41][42][43][44][45] Recently, nanoindentation techniques have been used to directly quantify the hardness of individual constituents in DP steels as well as characterizing hardness gradients which evolve during deformation within individual grains. [18,25,[46][47][48][49][50] In addition, digital image correlation (DIC) techniques applied to SEM images of deformed microstructures have been used to characterize the microscale evolution of localized strain gradients that develop during deformation of DP steels. [29] DIC results have confirmed that strain localization occurs at ferrite/martensite interfaces, with the severity increasing with greater hardness difference between ferrite and martensite.…”

Section: Introductionmentioning

confidence: 99%

Effects of Constituent Hardness on Formability of Dual Phase Steels

Taylor

Moor

Speer

et al. 2021

steel research int.

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“…All the indentation points have the same depth and the maximum indentation depth is 0.45 µm. The typical multiple loading-unloading curves were used based on [47][48][49].…”

Section: Microstructural Characteristics Of Dp600 Steelmentioning

confidence: 99%

Effects of Heterogeneous Microstructures on the Strain Hardening Behaviors of Ferrite-Martensite Dual Phase Steel

Ren

Dan

et al. 2018

Metals

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The complex strain hardening behaviors of dual phase (DP) steel are subjected to the heterogeneous microstructures. The current work aims to predict the strain hardening behaviors of ferrite-martensite DP steel, focusing on the effects of heterogeneous microstructure on mechanical properties. The flow stress of material was calculated based on the dislocation-based work-hardening model with considering the multi-boundaries hardening. The ferrite-martensite phase boundary percent and grain shape factor were selected as the heterogeneous feature parameters, which were introduced into the new proposed model. The theoretical calculated stress-strain responses were verified with experimental results using the tensile test. The model with the boundary strengthening consideration has more accurate results. The parameter effects of ferrite-ferrite boundary (FFB) spacing, ferrite-martensite boundary (FMB) percent, and grain shape factor on the flow stress-strain curve were researched.

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Research on flow behaviors of the constituent grains in ferrite–martensite dual phase steels based on nanoindentation measurements

Cited by 6 publications

References 34 publications

Strain-Hardening Prediction of DP600 Steel Considering the Heterogeneous Deformation Between Ferrite and Martensite

Strain-Hardening Prediction of DP600 Steel Considering the Heterogeneous Deformation Between Ferrite and Martensite

Effects of Constituent Hardness on Formability of Dual Phase Steels

Effects of Heterogeneous Microstructures on the Strain Hardening Behaviors of Ferrite-Martensite Dual Phase Steel

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