Low cycle fatigue performance of DP600 steel under various pre-straining paths

Das, Bimal; Singh, Akhilendra; Paul, Surajit Kumar

doi:10.1016/j.ijfatigue.2019.105331

Cited by 38 publications

(36 citation statements)

References 51 publications

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“…The microstructure consists of martensite phase (grain size ~2 μm) dispersed in ferrite (grain size ~6 μ m) matrix 18 . The monotonic properties of the investigated material are yield strength (439 MPa), ultimate tensile strength (656 MPa), uniform elongation (16.5%) and total elongation (28.5%) 19 . The above‐characterized properties meet the requirements according to EN 10149‐2 and SAE J2340.…”

Section: Methodsmentioning

confidence: 85%

“…18 The monotonic properties of the investigated material are yield strength (439 MPa), ultimate tensile strength (656 MPa), uniform elongation (16.5%) and total elongation (28.5%). 19 The abovecharacterized properties meet the requirements according to EN 10149-2 and SAE J2340. The profile of the selected wheel disc sectioned along the radial direction measured by coordinate measuring machine (CMM) is shown in Figure 1A.…”

Section: Methodsmentioning

confidence: 89%

“…Strain-controlled tests data DP600 steel specimens prestrained and tested in the rolling direction (PSRD-SRD) are taken from authors' previous published literature. 19 Fully reversed total strain controlled tests at a strain amplitude of 1% were performed at a constant strain rate of 2 × 10 −3 s −1 using a triangular waveform until failure. The material parameters for DP600 steel specimens prestrained and tested in the rolling direction (PSRD-SRD) are calibrated from strain-controlled stabilized hysteresis loop at a strain amplitude of 1%.…”

Section: Cyclic Plasticity Modellingmentioning

confidence: 99%

“…The material constants C i and γ i are also determined at these three segments from the stale hysteresis loop. The loading part of the hardening curve of stable loop is represented by the following equation:

\sum_{i = 1}^{3} α_{i} + σ_{0} = σ_{x} .

Strain‐controlled tests data DP600 steel specimens prestrained and tested in the rolling direction (PSRD‐SRD) are taken from authors' previous published literature 19 . Fully reversed total strain controlled tests at a strain amplitude of 1% were performed at a constant strain rate of 2 × 10 −3 s −1 using a triangular waveform until failure.…”

Section: Fe Analysis Of Bend Fatiguementioning

confidence: 99%

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Correlation between fatigue response of preformed bend DP600 steel specimen and wheel disc

Das

Singh

Paul

et al. 2020

Fatigue Fract Eng Mat Struct

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The present aim of this paper is to predict the cornering fatigue life of a wheel disc through a preformed bend DP600 steel specimen. To accomplish this objective, a newly designed preformed specimen with a bend radius equivalent to the weakest section of the wheel disc is fabricated by stamping operation followed by load-controlled high-cycle fatigue tests. Finite element (FE) simulation of stamping operation shows that an equivalent strain of 13% is induced to the bend specimen. Preformed bend specimen exhibits less fatigue resistance than the prestrained straight specimen for the same equivalent prestrain. A combined state of loading induces multiaxial stress state, giving rise to asymmetry of stresses along the thickness at the bend root of the DP600 steel specimen. Distribution of equivalent plastic strain and stress triaxiality from FE simulation indicates that fatigue crack occurs at the centre of the inner fibre of the bend root.

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Section: Methodsmentioning

confidence: 85%

Section: Methodsmentioning

confidence: 89%

Section: Cyclic Plasticity Modellingmentioning

confidence: 99%

\sum_{i = 1}^{3} α_{i} + σ_{0} = σ_{x} .

Section: Fe Analysis Of Bend Fatiguementioning

confidence: 99%

See 2 more Smart Citations

Correlation between fatigue response of preformed bend DP600 steel specimen and wheel disc

Das

Singh

Paul

et al. 2020

Fatigue Fract Eng Mat Struct

Self Cite

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“…Investigating the technology of cold forward rod extrusion, earlier studies [7], that were only correlating the forming conditions and the material performance under service load conditions, were extended by Tekkaya et al [6], who identified forming-induced initial damage to be the explanation for the correlation. Apart from this, the correlation of induced pre-deformation under different loading conditions with the fatigue performance has been addressed by [8] for TWIP-steel and [9] for DP600. Thereby, the relevance of the consideration of the load direction-dependent material behavior induced by pre-deformation arose, which has not yet been done for the case hardening steel 16MnCrS5 being processed using cold forward rod extrusion and being investigated in this study.…”

Section: Introductionmentioning

confidence: 99%

Load Direction-Dependent Influence of Forming-Induced Initial Damage on the Fatigue Performance of 16MnCrS5 Steel

Moehring

Walther

2020

Materials

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Forming processes influence the mechanical properties of manufactured workpieces in general and by means of forming-induced initial damage in particular. The effect of the latter on performance capability is the underlying research aspect for the investigations conducted. In order to address this aspect, fatigue tests under compressive, tensile and compressive-tensile loads were set-up with discrete block-by-block increased amplitudes and constant amplitudes, and performed up to fracture or distinct lifetimes. Aiming at the correlation of the macroscale mechanical testing results at the mesoscale, intensive metallographic investigations of cross-sections using the microscopical methods of secondary electron analysis, energy dispersive spectroscopy and electron backscatter diffraction were performed. Thereby, the correlation of forming-induced initial damage and fatigue performance was determined, the relevance of compressive loads for the cyclic damage evolution was shown, and material anisotropy under compressive loads was indicated. Finally, the need was addressed to perform further investigations regarding crack propagations and crack arrest investigations in order to clarify the mechanism by which initial damage affects cyclic damage evolution. The relevance of the principal stress axis relative to the extrusion direction was emphasized and used as the basis of an argument for investigations under load paths with different stress directions.

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Monotonic Tensile and Cyclic Deformation Behaviors of Carbide‐Free Bainitic Steel Subjected to Austempering and Tempering After Air Cooling

Zhou

Qian

Qin

et al. 2022

steel research int.

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Carbide-free bainitic steels have an extensive application in the railway and automotive industries because of excellent mechanical properties, such as strength, ductility, and toughness. [1][2][3][4][5][6][7] Based on the outstanding properties of this class of steel, some traditional dual-phase (DP) and conventional transformationinduced plasticity (TRIP) steels are expected to be replaced. [7][8][9] The typical microstructure of these steels is mainly composed of fine bainitic ferrite containing high density of dislocations, metastable retained austenite, and/or hard martensite. [1][2][3][4][5][6][7] The high strength is attributed to the fine scale of bainitic ferrite, high density of dislocations, and/or hard martensite; and the TRIP effect caused by the transformation of austenite to martensite induced by monotonic tensile strain provides the possibility for simultaneously strengthening and toughening of carbidefree bainitic steels. [10][11][12] So far, many investigations focus on the effect of the content and stability of retained austenite on mechanical properties of carbide-free bainitic steels. However, the tensile properties and corresponding monotonic deformation behaviors closely associated with the microstructural evolution of carbidefree bainitic steels are rarely reported.In practical applications, most of structural components in railway and automotive fields, such as rails/crossings, chassis, axles and suspension arms, and so on, are usually damaged or fatigue-failed owing to tension-compression cyclic deformation with large strains. [13][14][15][16][17][18] Therefore, understanding the low-cycle fatigue (LCF) properties and their influencing factors of structural components are very important for investigating the safe service condition. According to previous publications, austenite-to-martensite transformation can occur at accumulated plastic strain during cyclic loading, thereby influencing the cyclic deformation behavior and fatigue life. [15][16][17][18] As reported, the martensitic transformation from austenite induced by strain helps to promote cyclic hardening due to the TRIP effect, but shorten the fatigue life because of the existence of freshly brittle martensite, especially for austenitic stainless steels with larger amounts of retained austenite; [19][20][21] in the literature, however, it has been reported that the martensitic transformation from austenite in austenitic stainless steels with more retained austenite can not only promote cyclic hardening, but also contribute to increasing the fatigue life due to the TRIP effect. [22][23][24] Differently, several authors suggested that the transformation of austenite to martensite is not the main influencing factor of cyclic hardening for traditional DP and conventional TRIP steels with less amount of retained austenite, while it is beneficial to increase the fatigue life of these steels due to the TRIP effect. [25][26][27] In addition, these above reports also suggested that cyclic softening resulted from dislocation rearrangement a...

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Low cycle fatigue performance of DP600 steel under various pre-straining paths

Cited by 38 publications

References 51 publications

Correlation between fatigue response of preformed bend DP600 steel specimen and wheel disc

Correlation between fatigue response of preformed bend DP600 steel specimen and wheel disc

Load Direction-Dependent Influence of Forming-Induced Initial Damage on the Fatigue Performance of 16MnCrS5 Steel

Monotonic Tensile and Cyclic Deformation Behaviors of Carbide‐Free Bainitic Steel Subjected to Austempering and Tempering After Air Cooling

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