Effects of aging treatment on the precipitation behaviors and mechanical properties of Al-5.0Mg-3.0Zn-1.0Cu cast alloys

Tang, Honghu; Wang, Qudong; Luo, Colin; Lei, Chuan; Liu, Tian-wen; Li, Zhongyang; Jiang, Haiyan; Ding, Wei; Fang, Jian; Zhang, Jianwei

doi:10.1016/j.jallcom.2020.155707

Cited by 29 publications

(5 citation statements)

References 33 publications

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“…8l and exhibits a twofold symmetry. The precipitate is identified as T 0 since the PED pattern was found to correspond to FFTs or diffraction patterns of T 0 presented in previous studies [45,50,51,73,74].…”

Section: 4mentioning

confidence: 77%

“…The FFT and PED patterns of the T 0 phase viewed along C110D Al , however are characteristic and similar to the patterns presented in Refs. [45,50,51,73,74]. The crystal structure of T 0 is assumed to be the similar to the equilibrium phase T-Mg 21 (Al, Zn) 49 [42].…”

Section: Discussionmentioning

confidence: 99%

“…the one reported by Guo et al [47] (100) T //(100) Al and (001) T //(011) Al . Early studies indicate that the T phase and its precursor had approximately the same composition [42], although more recent atom probe tomography (APT) and energy-dispersive X-ray spectroscopy (EDS) studies report that the T 0 phase is more Mg-rich compared to the stable T phase [45,48]. Recently, Zou et al…”

Section: Introductionmentioning

confidence: 99%

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The Evolution of Precipitates in an Al-Zn-Mg Alloy

Thronsen

Shah

Hatzoglou

et al. 2023

Preprint

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Section: 4mentioning

confidence: 77%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Evolution of Precipitates in an Al-Zn-Mg Alloy

Thronsen

Shah

Hatzoglou

et al. 2023

Preprint

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“…Mg atoms trap vacancies more easily because of their stronger vacancy bonding energy than Zn or Cu atoms [54]. At an aging temperature is 120 • C, the diffusion coefficients of Zn and Mg are 3.11 × 10 −21 and 3.24 × 10 −21 m 2 /s, respectively, significantly higher than that of Cu (8.40 × 10 −23 m 2 /s) [55]. Thus, due to the size effect (with Mg atom radius being greater than Al and Zn), partial Mg-vacancies complexes preferentially cluster with Zn atoms.…”

Section: Effect Of Retrogression With Different Cooling Ways On Mecha...mentioning

confidence: 99%

Effect of Retrogression with Different Cooling Ways on the Microstructure and Properties of T’/η’ Strengthened Al-Zn-Mg-Cu Alloys

Zhang,

Shen,

Han

et al. 2024

Materials

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Retrogression and re-aging (RRA) treatment has been proven to effectively overcome the trade-off between strength and corrosion resistance. Current research focuses on the heating rate, temperature, and holding time of retrogression treatment while ignoring the retrogression cooling ways. In this paper, the effects of RRA treatment with different retrogression cooling ways on the microstructure and properties of newly developed T’/η’ strengthened Al-Zn-Mg-Cu alloys were investigated by performing tests on mechanical properties, intergranular corrosion (IGC) resistance, and electrochemical corrosion behavior. The results show that the mechanical properties of samples subject to RRA treatment with water-quenching retrogression (ultimate tensile strength, yield strength, and elongation of 419.2 MPa, 370.2 MPa, and 15.9, respectively) are better than those of air-cooled and furnace-cooled samples. The corrosion resistance of water-quenching (IGC depth of 162.2 μm, corrosion current density of 0.833 × 10−5 A/cm2) and furnace-cooled samples (IGC depth of 123.7 μm, corrosion current density of 0.712 × 10−5 A/cm2) is better than that of air-cooled samples. Microstructure characterization reveals that the effect of the retrogression cooling rate on mechanical properties is related to the size of T’/η’ precipitates with grains as well as the proportion of T’ and η’, while the difference in corrosion resistance depends on the continuity of grain boundary precipitates (GBPs). With mechanical properties, corrosion resistance, and time cost taken into consideration, it is appropriate to select water quenching for retrogression. These findings offer valuable insights for further design to achieve superior performance in various applications.

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“…The precipitation of Mg-rich nanoprecipitates in Al-Mg alloys has been manipulated for the strengthening of Cu/Zn-modified Al-Mg alloys by means of appropriate heat treatments [16,17]. However, these high-Mg nanoprecipitates are obtained at the cost of a large proportion of solute Mg atoms in the α-Al matrix, and such age-strengthened Al-Mg alloys exhibit a reduced ductility [18]. In order to achieve an enhanced combination of strength and ductility, a high-Mg Al-Mg-Zn-Sc alloy was designed in our study, which simultaneously includes high yield strength and elongation.…”

Section: Introductionmentioning

confidence: 99%

Effects of Heat Treatment on Microstructure and Mechanical Properties of Weldable Al–Mg–Zn–Sc Alloy with High Strength and Ductility

et al. 2023

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A weldable Al–Mg–Zn–Sc alloy was produced using vacuum induction melting and an argon-protected casting method to achieve high strength and ductility, and the effects of heat treatment on the microstructure evolution and mechanical properties of Al–Mg–Zn–Sc alloys were comparatively investigated. The results reveal that fine equiaxed grains with an average grain size of 40 μm in an as-cast Al–Mg–Zn–Sc alloy change little after heat treatments, bringing about a grain-boundary strengthening of 46.1 MPa. The coarse T-Mg32(Al, Zn)49 phases at grain boundaries are completely dissolved into the matrix through solid-solution treatment, and T-Mg32(Al, Zn)49 with diameters ranging from 10 to 25 nm and Al3Sc with diameters ranging from 5 to 20 nm gradually precipitate during the artificial aging process. The Mg solid solubility is 4.67% in the as-cast Al–Mg–Zn–Sc alloy, and it increased to 5.33% after solid-solution treatment and dramatically decreased to 4.15% after post-aging treatment. The contributions of solid-solution strengthening to as-cast, post-solid-solution and post-aging Al–Mg–Zn–Sc alloys are 78.2 MPa, 85.4 MPa and 72.3 MPa, respectively. The precipitation strengthening of the post-aging alloy is 49.7 MPa, which is an increase of 21% in comparison to that of both as-cast and post-solid-solution alloys. The alloy achieves an optimal tensile strength of 355.3 MPa, yield strength of 175 MPa and elongation of 22% after undergoing solid-solution treatment.

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Effects of aging treatment on the precipitation behaviors and mechanical properties of Al-5.0Mg-3.0Zn-1.0Cu cast alloys

Cited by 29 publications

References 33 publications

The Evolution of Precipitates in an Al-Zn-Mg Alloy

The Evolution of Precipitates in an Al-Zn-Mg Alloy

Effect of Retrogression with Different Cooling Ways on the Microstructure and Properties of T’/η’ Strengthened Al-Zn-Mg-Cu Alloys

Effects of Heat Treatment on Microstructure and Mechanical Properties of Weldable Al–Mg–Zn–Sc Alloy with High Strength and Ductility

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