Low Cycle Fatigue Properties of Extruded 6061-T6 Aluminum Alloy

Badaruddin, Mohammad; Zulhanif,; Supriadi, Harnowo

doi:10.1088/1742-6596/1198/3/032002

Cited by 11 publications

(5 citation statements)

References 13 publications

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“…Some of the most important properties in terms of application in industry, especially in automotive and aerospace constructions, are fatigue properties since operating elements undergo cyclic loading during utilization [27][28][29]. Particularly, the low cycle fatigue behavior, which is characterized by the presence of high strain amplitude, is the crucial factor to estimate the cumulative damage and changes of material properties in its life cycle [28,[30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Low Cycle Fatigue Properties of Sc-Modified AA2519-T62 Extrusion

et al. 2020

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This investigation presents the results of research on low cycle fatigue properties of Sc-modified AA2519-T62 extrusion. The basic mechanical properties of the investigated alloy have been established in the tensile test. The low cycle fatigue testing has been performed on five different levels of total strain amplitude: 0.4%; 0.5%; 0.6%; 0.7% and 0.8% with cycle asymmetry coefficient R = 0.1. For each level of total strain amplitude, the graphs of variations in stress amplitude and plastic strain amplitude in the number of cycles have been presented. The obtained results allowed to establish Ramberg-Osgood and Manson-Coffin-Basquin relationships. The established values of the cyclic strength coefficient and cyclic strain hardening exponent equal to k’ = 1518.1 MPa and n’ = 0.1702. Based on the Manscon-Coffin-Basquin equation, the values of the following parameters have been established: the fatigue strength coefficient σ’f = 1489.8 MPa, the fatigue strength exponent b = −0.157, the fatigue ductility coefficient ε’f = 0.4931 and the fatigue ductility exponent c = −1.01. The fatigue surfaces of samples tested on 0.4%, 0.6% and 0.8% of total strain amplitude have been subjected to scanning electron microscopy observations. The scanning electron microscopy observations of the fatigue surfaces revealed the presence of cracks in striations in the surrounding area with a high concentration of precipitates. It has been observed that larger Al2Cu precipitates exhibit a higher tendency to fracture than smaller precipitates having a higher concentration of scandium and zirconium.

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Section: Introductionmentioning

confidence: 99%

Low Cycle Fatigue Properties of Sc-Modified AA2519-T62 Extrusion

et al. 2020

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“…In the next step, to predict the fatigue life, Equation (2) was implemented, so the number of cycles to failure was calculated using a MATLAB (MathWorks, Natick, MA, USA) code based on the Newton–Raphson method. The material constants in Equations (1) and (2) are reported in Table 5 [ 32 ].…”

Section: Materials and Modelsmentioning

confidence: 99%

Fatigue Life Improvement of Cracked Aluminum 6061-T6 Plates Repaired by Composite Patches

et al. 2021

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Bonded patches are widely used in several industry sectors for repairing damaged plates, cracks in metallic structures, and reinforcement of damaged structures. Composite patches have optimal properties such as high strength-to-weight ratio, easiness in being applied, and high flexibility. Due to recent rapid growth in the aerospace industry, analyses of adhesively bonded patches applicable to repairing cracked structures have become of great significance. In the present study, the fatigue behavior of the aluminum alloy, repaired by a double-sided glass/epoxy composite patch, is studied numerically. More specifically, the effect of applying a double-sided composite patch on the fatigue life improvement of a damaged aluminum 6061-T6 is analyzed. 3D finite element numerical modeling is performed to analyze the fatigue performance of both repaired and unrepaired aluminum plates using the Abaqus package. To determine the fatigue life of the aluminum 6061-T6 plate, first, the hysteresis loop is determined, and afterward, the plastic strain amplitude is calculated. Finally, by using the Coffin-Manson equation, fatigue life is predicted and validated against the available experimental data from the literature. Results reveal that composite patches increase the fatigue life of cracked structures significantly, ranging from 55% to 100% for different applied stresses.

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“…However, very limited information is available on the material properties of the coating. Although some relevant data of coated aluminum alloys are available [128][129][130][131], direct applications of existing properties should be practiced with caution because material properties of coating depend on the coating process and the constitution of coating materials. In case the coating is required to be treated separately in the finite element model, a subroutine algorithm to reference the material properties that includes the S-N curve must be available.…”

Section: Fatigue Properties Of Coatingmentioning

confidence: 99%

Fatigue Analysis of Actuators with Teflon Impregnated Coating—Challenges in Numerical Simulation

Kang

Ouyang

2021

Actuators

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Actuators are essential components for motion in machines, and warranty service lives are basic specifications of actuators. However, fatigue damage or wear of actuators are very complex and related to many design factors, such as materials properties, surface conditions, loads, and operating temperature. Actuator manufacturers still rely heavily on physical experiments to determine the fatigue lives of actuators. This paper investigates the state-of-the-art of using numerical simulations for fatigue analysis of mechanical actuators. Failure criteria of machine elements are discussed extensively; existing works on using finite element methods for machine element designs are examined to (1) explore the feasibility of using a numerical simulation for fatigue analysis and (2) discuss the technical challenges in practice. Moreover, a systematic procedure is suggested to predict fatigue lives of mechanical actuators with Teflon impregnated hard coatings. A virtual fatigue analysis allows for optimizing a mechanical structure, reducing design verification costs, and shortening the development time of actuators.

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Low Cycle Fatigue Properties of Extruded 6061-T6 Aluminum Alloy

Cited by 11 publications

References 13 publications

Low Cycle Fatigue Properties of Sc-Modified AA2519-T62 Extrusion

Low Cycle Fatigue Properties of Sc-Modified AA2519-T62 Extrusion

Fatigue Life Improvement of Cracked Aluminum 6061-T6 Plates Repaired by Composite Patches

Fatigue Analysis of Actuators with Teflon Impregnated Coating—Challenges in Numerical Simulation

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