Effect of strain ratio on cyclic deformation behaviour of 7050-T6 aluminium alloy

Branco, R.; Borrego, L.P.; Wu, Shengchuan; Long, Xiaoyan; Zhang, F.C.

doi:10.1016/j.ijfatigue.2019.105234

Cited by 39 publications

(29 citation statements)

References 38 publications

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“…This indicates that this alloy can have different cyclic deformation micromechanisms for different strain amplitudes. This bilinear behavior has already been found in other metallic materials such as nickel superalloys (Ye et al 18 and Gopinath et al 19 ), aluminum alloys (Branco et al 20 and Prasad et al 21 ) and titanium alloys (Singh & Gouthama, 22 ).…”

Section: Introductionsupporting

confidence: 55%

Fatigue behavior of Ti6Al4V alloy components manufactured by selective laser melting subjected to hot isostatic pressing and residual stress relief

Jesús

Borrego

Ferreira

et al. 2021

Fatigue Fract Eng Mat Struct

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Fatigue behavior (R ε = −1) of HIPed and stress relieved Ti6Al4V alloy specimens produced by selective laser melting (SLM) was analyzed and compared resulting that the hot isostatic pressing (HIP) process caused a microstructural transformation decreasing the hardness and monotonic properties leading to cyclic softening that not allowed fatigue strength to increase. A bilinear behavior in the elastic strain-fatigue life curve was observed due to the decrease of the Young's modulus during the cyclic elastoplastic tests, consequence of subgrains formation. The Smith-Watson-Topper and total strain energy density models adjusted by the bilinear behavior showed a good concordance between predicted and experimental fatigue lives in notched samples.

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Section: Introductionsupporting

confidence: 55%

Fatigue behavior of Ti6Al4V alloy components manufactured by selective laser melting subjected to hot isostatic pressing and residual stress relief

Jesús

Borrego

Ferreira

et al. 2021

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

“…Similar to this work, presenting the cyclic behavior of aluminum alloys could be found in the literature by Azadi (2013), Azadi and Shirazabad (2013), Do Lee and Yoo (2014), Kim et al (2015), Azadi (2017), and Azadi et al (2020). Branco et al (2019) studied the strain ratio influence on the cyclic deformation behavior of the 7050-T6 aluminum alloy. Their results illustrated that the material depicted cyclic strain-softening, which increased when the strain ratio increased and the strain amplitude decreased.…”

Section: Introductionmentioning

confidence: 99%

Cyclic hardening/softening experimental data in nano-clay-composite and aluminum alloy under high-temperature strain-controlled loading

et al. 2022

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This article presents cyclic hardening/softening behaviors (experimental data) of the heat-treated aluminummatrix nano-clay-composite (AlSi_N_HT6), compared to those of the piston aluminum alloy (AlSi) under straincontrolled loading. For such an objective, standard samples were fabricated by gravity and stir-casting methods. Low-cycle fatigue experiments were carried out under different strain amplitudes (0.20% to 0.45%) and at various temperatures (25 ℃ to 300 ℃). Obtained results implied that no obvious change was observed on material properties of aluminum alloy by reinforcements, but a decrement was observed due to increasing the temperature. Results also indicated that the increase of the temperature from 25 ℃ to 200 ℃ has changed the cyclic behavior of both materials (AlSi_N_HT6 and AlSi) from hardening to softening. Moreover, the temperature effect was more significant than the total strain amplitude influences in cyclic behaviors.

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“…DP steel is a kind of multiphase structure composed of hard martensite islands distributed in soft ferrite matrix 13 . This composition makes the microstructure uneven, which may lead to premature stress concentration and local plastic deformation 14 . Microcyclic plasticity surrounding the holes and contour variations could initiate fatigue cracks in the structural component.…”

Section: Introductionmentioning

confidence: 99%

Low cycle fatigue performance of DP900 steel under cyclic shear paths

Zhang

Yue

et al. 2021

Fatigue Fract Eng Mat Struct

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In this study, a sheet fatigue shear test device is designed and applied to the low‐cycle fatigue testing of DP900 with varying strain amplitudes within the range of 0.5%–6.0%. The microstructure is analyzed by using electron backscatter diffraction, and fracture surfaces are examined via scanning electron microscopy. Results indicate that the material exhibits cyclic softening behavior after the first two cycles of hardening, with a stable softening rate and a high damage evolution rate related to loading amplitude. The variation of the hysteresis curve in the cyclic process is shown. Total plastic strain energy absorbed increases as loading amplitude decreases and it reaches the peak at approximately 1%. The life prediction model based on plastic strain energy density and strain amplitude is verified to be suitable for the cyclic shear path. The influence of microinhomogeneity on the distribution of stress and strain, especially the deformation of martensite, is closely related to the bi‐linear region of fatigue life curve.

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Effect of strain ratio on cyclic deformation behaviour of 7050-T6 aluminium alloy

Cited by 39 publications

References 38 publications

Fatigue behavior of Ti6Al4V alloy components manufactured by selective laser melting subjected to hot isostatic pressing and residual stress relief

Fatigue behavior of Ti6Al4V alloy components manufactured by selective laser melting subjected to hot isostatic pressing and residual stress relief

Cyclic hardening/softening experimental data in nano-clay-composite and aluminum alloy under high-temperature strain-controlled loading

Low cycle fatigue performance of DP900 steel under cyclic shear paths

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