Study on quenching sensitivity of 7097 aluminum alloy

Xie, Ping; Chen, Kanghua; Chen, Songyi; Ye, Shengping; Jiao, Huibin; Huang, Lanping

doi:10.1088/2053-1591/ab5987

Cited by 5 publications

(2 citation statements)

References 28 publications

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“…According to the TTT and TTP curves, the nose temperature for most intense precipitation of the alloy can be obtained. Xie et al developed TTT and TTP curves for 7079 aluminum alloy [13]. Their findings indicated a quench sensitivity temperature range for the alloy of 230-370 • C, with a nose temperature at 320 • C. Li et al examined the impact of alloy composition on the quench sensitivity of 2 of 11 7085 aluminum alloy [14].…”

Section: Introductionmentioning

confidence: 99%

Study on Quench Sensitivity during Isothermal Treatment of 7A65 Aluminum Alloy

Li,

Bao,

Huang

et al. 2023

Materials

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The quenching sensitivity of 7A65 aluminum alloy was investigated using interrupted quenching experiments. The time–temperature transformation (TTT) and time–temperature performance (TTP) curves of the alloy were determined. The results indicate that the nose temperature is about 320 °C and the quenching sensitivity temperature range is from 240 °C to 360 °C. During the isothermal treatment, the supersaturated solid solution resolves to the equilibrium phase of η (MgZn2), and the precipitation rate is the largest at about 320 °C. Through transmission electron microscope (TEM) observation and X-ray diffraction (XRD) tests, it was found that with the extension of the isothermal holding time, the originally dispersed η’ phase gradually decreases until disappear, and the number of η phase increases and gradually grows up at the grain boundary or around the Al3Zr particles. The rod-like η phase at the grain boundary is distributed from discontinuous distribution to chain-like continuous distribution, and the precipitation free zone (PFZ) is gradually generated and widened as the holding time is extended. At the nose temperature, the driving force of nucleation is high, and the diffusion rate is fast, which promotes the precipitation and growth of η phases. The coarse η phase weakens the mechanical properties. According to the results, it is recommended to increase the cooling rate at the sensitivity temperature range to reduce the precipitation of the η phase and decrease the quenching cooling rate from solution temperature to 360 °C to reduce residual stresses in the components.

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Section: Introductionmentioning

confidence: 99%

Study on Quench Sensitivity during Isothermal Treatment of 7A65 Aluminum Alloy

Li,

Bao,

Huang

et al. 2023

Materials

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“…Their results showed that a decrease in alloying elements such as Al, Zn, Mg and Cu and an increase in Zn/Mg ratio decrease the quench sensitivity. Xie et al [18] assessed the quench sensitivity of low Cu-containing high strength AA7097 and compared the results with the results for AA7055 and AA7085 which contain high and medium Cu, respectively. The AA7097 showed a lower quenching sensitivity than AA7055 but higher than AA7085.…”

Section: Introductionmentioning

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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Study on quenching sensitivity of an Al–Zn–Mg–Cu alloy containing trace amounts of Sc and Zr

Pan

Liu

et al. 2022

J Mater Sci

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Study on quenching sensitivity of 7097 aluminum alloy

Cited by 5 publications

References 28 publications

Study on Quench Sensitivity during Isothermal Treatment of 7A65 Aluminum Alloy

Study on Quench Sensitivity during Isothermal Treatment of 7A65 Aluminum Alloy

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

Study on quenching sensitivity of an Al–Zn–Mg–Cu alloy containing trace amounts of Sc and Zr

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