Influence of uniaxial and biaxial pre-straining on the high cycle fatigue performance of DP590 steel

Ghosal, Puja; Paul, Surajit Kumar; Raj, Abhishek

doi:10.1016/j.ijfatigue.2021.106369

Cited by 9 publications

(9 citation statements)

References 40 publications

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“…This was attributed to the formation of compressive residual stresses around martensite particles in the direction perpendicular to tensile axis of pre-strain 39 . The same outcome was observed for biaxial pre-strain 44 . Therefore, only considering uniaxial pre-strain in the same direction as testing is a conservative approach for fatigue life assessment.…”

Section: R=-1supporting

confidence: 80%

“…Minor positive effect on notch fatigue was explained due to higher stress concentration caused by increased yield strength, which nullified the beneficial effect of pre-strain on HCF. The same research group also studied the influence of uni-axial and biaxial pre-strain on a DP590 steel [43][44][45] . Bi-axial pre-strain was found to increase strength and reduce ductility more than uni-axial pre-strain for equivalent plastic strain.…”

Section: Influence Of Pre-strainmentioning

confidence: 99%

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Influence of pre-strain and bake hardening on the static and fatigue strength of a DP600 steel sheet

Kusch

Crivelli

Diviani

et al. 2023

Preprint

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The influence of pre-strain on the tensile and fatigue properties of a dual phase DP600 was studied. The material was pre-strained by uni-axial tension in rolling and transverse direction. Thereafter, specimens were cut from the deformed plates in parallel or orthogonal to pre-strain direction. It was found that pre-strain increases yield and tensile strength. Results suggested that strain path change primarily affects the elastic-plastic transition during early stage of reloading. Pre-strained specimens showed an increase in high cycle regimes as a consequence of yield strength increment, irrespective of imposed pre-straining direction. A modified stress life equation which accounts for pre-strain was proposed and showed good agreement with experimental data. Bake hardening enhanced both tensile and high cycle fatigue resistance. Walker equation was successfully fitted to account tensile mean stress. In low cycle fatigue, negligible influence of pre-strain was observed due to cyclic softening and residual stress relaxation.

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Section: R=-1supporting

confidence: 80%

Section: Influence Of Pre-strainmentioning

confidence: 99%

Influence of pre-strain and bake hardening on the static and fatigue strength of a DP600 steel sheet

Kusch

Crivelli

Diviani

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…This was attributed to the formation of compressive residual stresses around martensite particles in the direction perpendicular to tensile axis of pre‐strain 40 . The same outcome was observed for biaxial pre‐strain 43 . Therefore, only considering uniaxial pre‐strain in the same direction as testing is a conservative approach for fatigue life assessment.…”

Section: Resultsmentioning

confidence: 78%

“…The same research group also studied the influence of uniaxial and bi-axial pre-strain on a DP590 steel. [43][44][45] Bi-axial pre-strain was found to increase strength and reduce ductility more than uni-axial pre-strain for equivalent plastic strain. This resulted in significant improvement of long life and reduction of short lives.…”

Section: Influence Of Pre-strainmentioning

confidence: 96%

“…Minor positive effect on notch fatigue was explained due to higher stress concentration caused by increased yield strength, which nullified the beneficial effect of pre‐strain on HCF. The same research group also studied the influence of uni‐axial and bi‐axial pre‐strain on a DP590 steel 43–45 . Bi‐axial pre‐strain was found to increase strength and reduce ductility more than uni‐axial pre‐strain for equivalent plastic strain.…”

Section: Overview Of Recent Developmentsmentioning

confidence: 99%

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Influence of pre‐strain and bake hardening on the static and fatigue strength of a DP600 steel sheet

Kusch

Crivelli

Diviani

et al. 2023

Fatigue Fract Eng Mat Struct

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The influence of pre‐strain on the tensile and fatigue properties of a dual phase DP600 steel was studied. The material was pre‐strained by uni‐axial tension in rolling and transverse direction. Thereafter, specimens were cut from the deformed plates in parallel or orthogonal to pre‐strain direction. It was found that pre‐strain increases yield and tensile strength. Results suggested that strain path change primarily affects the elastic‐plastic transition during early stage of reloading. Pre‐strained specimens showed an increase in high cycle regimes as a consequence of yield strength increment, irrespective of imposed pre‐straining direction. A modified stress life equation that accounts for pre‐strain was proposed and showed good agreement with experimental data. Bake hardening enhanced both tensile and high cycle fatigue resistance. Walker equation was successfully fitted to account for tensile mean stress. In low cycle fatigue, negligible influence of pre‐strain was observed due to cyclic softening and residual stress relaxation.

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High‐Cycle‐Fatigue Anisotropy of an Aluminum Alloy Superthick Plate

Wang,

Zhang,

Gong

et al. 2024

Adv Eng Mater

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The effect of anisotropy on high‐cycle fatigue (HCF) property along the rolling direction (RD) and the transverse direction (TD) of a 7××× aluminum alloy super thick plate is mainly investigated in this study. The results show a similar microstructure at different thicknesses, and the HCF properties are close as well. The fatigue fracture morphologies show that the fatigue crack sources are all located on the surfaces of the RD and TD specimens. By considering the differences in the HCF properties, there is only a slight anisotropy effect at the center thickness of the plate, which can be attributed to the tensile anisotropy caused by textures. Besides, the fatigue damage degree along the TD is slightly higher than that along the RD at the center thickness. The reason can be explained by two aspects: one is the higher probability of defect occurrence along the TD compared with that along the RD which is analyzed by the previously proposed Yield strength‐Tensile strength‐Fatigue strength model, and the other is the influence of the textures. The combination of hard and soft orientations may cause fatigue damage localization easily in the soft‐oriented grains which accelerates the fatigue failure.

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Influence of uniaxial and biaxial pre-straining on the high cycle fatigue performance of DP590 steel

Cited by 9 publications

References 40 publications

Influence of pre-strain and bake hardening on the static and fatigue strength of a DP600 steel sheet

Influence of pre-strain and bake hardening on the static and fatigue strength of a DP600 steel sheet

Influence of pre‐strain and bake hardening on the static and fatigue strength of a DP600 steel sheet

High‐Cycle‐Fatigue Anisotropy of an Aluminum Alloy Superthick Plate

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