TTP diagrams for 7055 aluminium alloy

Liu, S. D.; Zhang, X. M.; You, Jiang-hai; Huang, Zaiwang; Zhou, Zhongwei

doi:10.1179/174328407x161268

Cited by 8 publications

(5 citation statements)

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“…7055-T77 alloy can offer higher strength about 10% than 7150-T6 and 30% than 7075-T76 with high fracture toughness and good resistance to corrosion and to the growth of fatigue cracks, and these attractive properties are attributed to the high Zn/Mg and Cu/Mg ratios [16]. Due to the greater amount of (Zn + Mg + Cu) elements, this alloy is more quench sensitive than some other AlZnMgCu alloys, as shown in a previous paper [17].…”

Section: Introductionmentioning

confidence: 75%

“…According to Fig. 1(b), it is obvious that a decreasing quenching rate over the length of the sample was obtained, which was from about 170 • C/s at D = 0 mm to about 8 • C/s at D = 17 mm and to about 2 • C/s at D = 105 mm.The quenching rate was the average value calculated in the range of 420-230 • C, which is the critical temperature range for 7055 aluminum alloy [17]. After cooling to room temperature the samples were aged at 121 • C for 24 h immediately.…”

Section: Methodsmentioning

confidence: 99%

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Effect of microstructure on the quench sensitivity of AlZnMgCu alloys

Liu

Zhang

et al. 2010

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 75%

Section: Methodsmentioning

confidence: 99%

Effect of microstructure on the quench sensitivity of AlZnMgCu alloys

Liu

Zhang

et al. 2010

Journal of Alloys and Compounds

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“…t 0 and t f are the start and end times of quenching, respectively. The time step is chosen as ∆t = 0.1 s to account for less than 25 • C drop in the critical temperature [32]. The critical quenching rate for AA7075-T6 is about 300 K/s [1].…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Effects of Quenching on Corrosion and Hardness of Aluminum Alloy 7075-T6

2022

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Quenching affects the mechanical and corrosion properties of precipitation-hardenable alloys such as aluminum alloy 7075-T6 (AA7075-T6). In this paper, the properties of as-quenched AA7075-T6 are predicted within the framework of quench factor analysis (QFA), using cooling curves obtained from a quench test. Theoretical and computational approaches are used to predict spatial and temporal variations of temperature. The temperature variations are used to predict the quench factor and consequently the material properties. A test is carried out on a block of AA7075-T6 quenched partly in water and partly in air followed by hardness measurements and electrochemical characterizations. The results show that the hardness and the corrosion potential of the quenched block decrease as the cooling rate decreases. The results further suggest the existence of a corrosion product layer for the water-quenched part of the sample. This was not observed for the air-cooled part. A new corrosion prediction model is developed by using the QFA method, cyclic polarization, and electrochemical impedance spectroscopy test results. The present model may be used to potentially reduce the number of corrosion tests in evaluating corrosion properties of quenched AA7075-T6. Model predictions for corrosion and hardness are in good agreement with experimental results.

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“…This experimental procedure was described in detail elsewhere [4,13,14]. The samples with a size of Φ12.5 mm × 3.5 mm were solution treated at 470°C for 1 h, followed by transferring to a salt bath with temperature from 180 to 420°C for various times and then quenched into cold water.…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 99%