Corrosion Fatigue Behavior of 7A85 Aluminum Alloy Thick Plate in NaCl Solution

Ye, Zuo-Yan; Liu, Daoxin; Zhang, Xiaohua; Zhang, Xiaoming; Lei, Ming-Xia; Yang, Zhi

doi:10.1007/s40195-015-0293-x

Cited by 17 publications

(7 citation statements)

References 15 publications

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“…In dry and non-salty environments, a thin aluminum oxide layer, formed on the alloys, can restrain their further corrosion. However, this thin layer is reactive and prone to corrosion in aggressive environments [1,2], which prevents them from being widely used in the harsh environments.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Resistance of Superhydrophobic Mg–Al Layered Double Hydroxide Coatings on Aluminum Alloys

Zhang

Song

et al. 2015

Acta Metall. Sin. (Engl. Lett.)

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A superhydrophobic surface was successfully constructed to modify the layered double hydroxide (LDH) coatings on aluminum alloy using stearic acid. The characteristics of the coatings were investigated using SEM, XRD, FT-IR and XPS. The corrosion resistance of the prepared coatings was studied using potentiodynamic polarization and electrochemical impedance spectrum. The results revealed that the superhydrophobic surface considerably improved the corrosion-resistant performance of the LDH coatings on the aluminum alloy substrate. The formation mechanism of the superhydrophobic surface was proposed.

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Section: Introductionmentioning

confidence: 99%

Corrosion Resistance of Superhydrophobic Mg–Al Layered Double Hydroxide Coatings on Aluminum Alloys

Zhang

Song

et al. 2015

Acta Metall. Sin. (Engl. Lett.)

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“…Therefore, the fatigue properties of aluminum alloy were studied by scientific researchers. In order to approximate the actual service conditions, fatigue tests were designed to be different strain ratios, corrosion environment conditions and so on [12][13][14][15] . Sreenivasan et al [16] have investigated the role of accumulation of ratcheting strain on low cycle fatigue behavior of aluminum 7075-T6 alloy, the results indicated that ratcheting strain was detrimental to fatigue life of aluminum 7075-T6 alloy by comparing the low cycle fatigue behavior of the investigated alloy with and without ratcheting indicated.…”

Section: Intrductionmentioning

confidence: 99%

Low-cycle fatigue behavior of extruded Al-7Zn-2Mg-1.5Cu-0.2Sc-0.1Zr alloy at room and low temperatures

Zhu

Chen

et al. 2018

MATEC Web Conf.

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Due to the low density and high specific strength, aluminum alloys have been considered for automotive and aerospace applications. The aluminum components usually service in the conditions of low temperature and dynamic loading. Therefore, the research on the low temperature fatigue performances of Al alloys has great significance. The lowcycle fatigue tests for the extruded Al-7Zn-2Mg-1.5Cu-0.2Sc-0.1Zr alloy subjected to solution plus aging treatment have been conducted at 25°C and -40°C, respectively. The strain ratio and cyclic frequency applied in the low-cycle fatigue test were -1 and 0.5Hz, respectively. The experimental results show that at 25°C, the alloy exhibits the cyclic hardening at the total strain amplitudes of 1.0% and 1.2%, and the cyclic stabilization at the total strain amplitudes of 0.4%, 0.6% and 0.8%. At -40°C, however, the cyclic stability is observed during whole fatigue deformation at the total strain amplitudes of 0.4%, 0.5%, 0.6%, 0.7% and 0.8%. The relationship between the elastic strain amplitude, plastic strain amplitude and reversals to failure can be described by Basquin and Coffin-Manson equations, respectively. In addition, the observation results of fatigue fracture surfaces reveal that the cracks initiate at the free surface of fatigue specimen and propagate in a transgranular mode.

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“…Surface depth can only improve the fatigue life of materials in a certain range, too much depth may reduce the fatigue strength of materials [14]. Ye et al obtained the S-N curve of 7A85-T7452 aluminum alloy in air and neutral 3.5% NaCl solution through axial fatigue test and found that corrosion had no obvious influence on fatigue life in high-stress cycling regions, but significant influence in low-stress regions [15]. Fonte designed and built the test machine of bending coupling fatigue and performed fatigue tests on the cylindrical samples [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Impact Analysis of Initial Cracks’ Angle on Fatigue Failure of Flange Shafts

Cui

et al. 2022

Coatings

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A fatigue test on the failure mode of flange shafts was conducted. The propagation characteristics of the initial crack at the junction between the shaft and the flange as well as its angle effect were studied. This study developed an analysis program of fatigue crack propagation, based on the APDL (ANSYS Parametric Design Language). It obtained the effective angle interval within which the initial crack is able to propagate. The fitting calculation formula was derived and the results showed that: (1) The initial crack at the junction between the shaft and the flange would propagate in the radial and axial directions; the unstable crack propagation would cause an abrupt fracture of the cross-section, failing connection; and the angle of initial crack was uncertain. (2) The crack followed the I-II-III mixed mode, which was dominated by mode I. An initial crack with a larger angle showed more noticeable II-III characteristics; KII and KIII affected the crack’s propagation angle in the radial and axial directions and they also affected the structure’s surface direction. (3) The deepest point A of the crack was located at the junction between the shaft and the flange. Its crack propagation can be divided into three stages: rapid growth (stage 1), steady decline (stage 2, buffer stage), and instability (stage 3). The initial crack angle not only affected the propagation rate at stage 1 but also influenced the fatigue life distribution of the structure during propagation. The larger the initial crack angle was, the smaller the proportion of buffer stage in the total fatigue life would be. Moreover, the propagation of crack with a larger initial angle reached instability faster after stage 1, which would cause an abrupt fracture of the cross-section. This was unfavorable for deciding the crack detection time or carrying out maintenance and reinforcement. (4) The crack propagation at the junction between the shaft and the flange was determined by the size relation between ΔKI and ΔKth, instead of the effective stress intensity factor. The effective stress intensity factor can partly reflect the law of crack propagation, but cannot serve as the only criterion for crack propagation; it must be combined with the effective angle interval, which was negatively correlated with the crack’s shape ratio, to determine whether the crack would propagate.

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Corrosion Fatigue Behavior of 7A85 Aluminum Alloy Thick Plate in NaCl Solution

Cited by 17 publications

References 15 publications

Corrosion Resistance of Superhydrophobic Mg–Al Layered Double Hydroxide Coatings on Aluminum Alloys

Corrosion Resistance of Superhydrophobic Mg–Al Layered Double Hydroxide Coatings on Aluminum Alloys

Low-cycle fatigue behavior of extruded Al-7Zn-2Mg-1.5Cu-0.2Sc-0.1Zr alloy at room and low temperatures

Impact Analysis of Initial Cracks’ Angle on Fatigue Failure of Flange Shafts

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