A modified model to depict corrosion fatigue crack growth behavior for evaluating residual lives of aluminum alloys

Wang, C.Q.; Xiong, Jun-Jiang; Shenoi, R.A.; Liu, M.D.; Liu, J.Z.

doi:10.1016/j.ijfatigue.2015.10.023

Cited by 28 publications

(23 citation statements)

References 32 publications

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“…The crack growth material parameters were calibrated for the un-corroded specimen as C=1.98×10−10m/false(cycleMPamfalse), m=3.4 and these were also assumed to be applicable to life prediction of pre-corrosion specimens. Although corrosion-fatigue tests of aluminum alloy, performed in corrosion solution, have shown that fatigue crack growth parameters exhibit different values in different environments [25,52], it has been argued that it is acceptable to adopt constant material parameters, independent of environment, in the case of pre-corrosion aluminum alloy, for fatigue life prediction [6,7]. In any case, the rationale here is that the key effect of pre-corrosion is to influence the initial damage.…”

Section: Modellingmentioning

confidence: 99%

“…In the fracture mechanics-based approach, localized corrosion regions were usually considered to be equivalent to surface cracks. A crack growth accumulative methodology based on the Willenborg-Chang rule was used to evaluate the residual life of aluminum alloy under corrosion-fatigue conditions [25]. Linear elastic fracture mechanics modelling, using a corrosion modified-equivalent initial flaw size, was adopted to predict fatigue life of field corroded AA7075-T6511 under variable amplitude loading [7].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A DIC-Based Study on Fatigue Damage Evolution in Pre-Corroded Aluminum Alloy 2024-T4

et al. 2018

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This paper investigates the fatigue damage and cracking behavior of aluminum alloy 2024-T4 with different levels of prior corrosion. Damage evolution, crack initiation and propagation were experimentally analyzed by digital image correlation, scanning electron microscopy and damage curves. Prior corrosion is shown to cause accelerated damage accumulation, inducing premature fatigue crack initiation, and affecting crack nucleation location, crack orientation and fracture path. For the pre-corrosion condition, although multiple cracks were observed, only one corrosion-initiated primary crack dominates the failure process, in contrast to the plain fatigue cases, where multiple cracks propagated simultaneously leading to final coalescence and fracture. Based on the experimental observations, a mixed-mode fracture model is proposed and shown to successfully predict fatigue crack growth and failure from the single dominant localized corrosion region.

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Section: Modellingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A DIC-Based Study on Fatigue Damage Evolution in Pre-Corroded Aluminum Alloy 2024-T4

et al. 2018

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“…In following paragraphs, a literature review could be seen for fatigue properties of aluminum alloys [4][5][6][7][8][9][10][11][12][13] and aluminum-matrix composites [14][15][16][17]. In addition, some other articles [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37] have been reviewed for corrosion-fatigue properties of aluminum alloys. Ueno et al [4] studied fatigue properties of Al-Si-Cu alloys in ambient air and vacuum environments.…”

Section: Introductionmentioning

confidence: 99%

“…Under higher stress levels, corrosion-fatigue lives decreased effectively. Wang et al [27] found a modi ed Trantina-Johnson model to predict the corrosion-fatigue crack growth behavior for evaluating residual lives of aluminum alloys. Their models had a good correlation with experimental results.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Effects on High‐cycle Fatigue Lifetime and Fracture Behavior for Heat‐treated Aluminum‐matrix Nano‐clay‐composite Compared to Piston Aluminum Alloy

Aroo

Azadi

2021

Silicon

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In this research, the corrosion effect has been investigated on the high-cycle fatigue lifetime and the fracture behavior for the heat-treated aluminum-matrix nano-clay-composite and piston aluminum alloys. For this objective, after fabricating stir-casted nano-clay-composite, standard samples were machined and rotary bending fatigue tests were performed. To study the corrosion effect, some specimens were corroded in in the 0.00235% H 2 SO 4 solution after 200 hours and then, they were tested under cyclic bending loading. Due to increase in the hardness by adding nano-clay particles and the heat treatment, higher fatigue strength occurred, compared to the base material. Nano-clay particles shortened the fatigue lifetime; however, this effect was less in the corrosion-fatigue lifetime. Moreover, the failure mechanism was the brittle fracture behavior due to the observation of quasi-cleavage and cleavage marks.

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“…Many recent monographs present the state-of-the-art in knowledge of fatigue crack growth behavior under overload effects in metallic materials by using experimental investigation and theoretical analysis [1][2][3][4]. J. Lankford.…”

Section: Introductionmentioning

confidence: 99%

Investigation of fatigue crack growth under loading sequence effects using in-situ SEM testing

et al. 2018

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Abstract. Fatigue damage is one of the most important failure mechanisms in engineering components. The excited structures are usually subjected to spike loads in the fatigue weakness area during their service lives. The nonlinear loading sequence effects due to overloads are significant in the crack propagation process. In this paper, an in-situ scanning electron microscope (SEM) testing is performed to analyse the mechanisms of nonlinear fatigue crack growth affected by the load sequence. The crack tip behaviours under constant amplitude loading cycles superimposed by tensile overload were observed. The SEM experiment results reveal that the overload effects include the transient weakened area (shear bands and micro-cracks) and the relatively long-term retardation. Additionally, the observation loading sequence influence region is larger than the theoretical value. According to these SEM testing analyses, the Willenborg is modified considering the nonlinear loading sequence effects. In this approach, the damage zone concept is introduced to account for the instantaneous acceleration. Moreover, the loading sequence effect area is defined as the whole plastic zone due to overload rather than part of it. The proposed algorithm is validated by experiment data of 350WT steel and Al 2024-T351 specimens under constant loading with overloads. Good agreements are observed.

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A modified model to depict corrosion fatigue crack growth behavior for evaluating residual lives of aluminum alloys

Cited by 28 publications

References 32 publications

A DIC-Based Study on Fatigue Damage Evolution in Pre-Corroded Aluminum Alloy 2024-T4

A DIC-Based Study on Fatigue Damage Evolution in Pre-Corroded Aluminum Alloy 2024-T4

Corrosion Effects on High‐cycle Fatigue Lifetime and Fracture Behavior for Heat‐treated Aluminum‐matrix Nano‐clay‐composite Compared to Piston Aluminum Alloy

Investigation of fatigue crack growth under loading sequence effects using in-situ SEM testing

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