Temperature Ranges of Phase Transformations and Mechanical Properties of Alloys of the Al - Cu - Mg - Ag System with Various Cu/Mg Ratios

Teleshov, V. V.; Kaputkin, E. Ya.; Golovleva, A. P.; Kosmacheva, N. P.

doi:10.1007/s11041-005-0042-2

Cited by 15 publications

(10 citation statements)

References 4 publications

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“…The results demonstrate no significant difference in the recrystallization fraction of the T4-state alloy, which is related to Zr addition or two-stage heterogenization. The high recrystallization fraction (90%) is attributed to the fact that the recrystallization temperature (400–450 °C) [ 32 ], which is enhanced by Al 3 Zr particles, is lower than the solution-treatment temperature of AA2024 (495 °C). As a result, all cold-rolled alloys were almost fully recrystallized after the high-temperature solution treatment.…”

Section: Resultsmentioning

confidence: 99%

“…The first endothermic peak (Peak I) between 505 and 515 °C corresponds to the melting of the ternary eutectic phases (α + θ + S). The second endothermic peak (Peak II) between 510 and 530 °C corresponds to the melting of the binary eutectic phases (α + θ) [ 5 , 28 , 29 , 30 , 31 , 32 , 33 ]. Owing to the absence of ternary eutectic phases (α + θ + S), the melting temperature increases by 17 °C in the one-stage heterogenized condition compared to the as-cast condition.…”

Section: Resultsmentioning

confidence: 99%

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Effects of Heterogenization Treatment on the Hot-Working Temperature and Mechanical Properties of Al-Cu-Mg-Mn-(Zr) Alloys

et al. 2023

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This study investigated the effects of a minor Zr addition (0.15 wt%) and heterogenization treatment (one-stage/two-stage) on the hot-working temperature and mechanical properties in Al-4.9Cu-1.2Mg-0.9Mn alloy. The results indicated that the eutectic phases (α-Al + θ-Al2Cu + S-Al2CuMg) dissolved after heterogenization, retaining θ-Al2Cu and τ1-Al29Cu4Mn6 phases, while the onset melting temperature increased to approximately 17 °C. A change in the onset melting temperature and evolution of the microstructure is used to assess an improvement in hot-working behavior. With the minor Zr addition, the alloy exhibited enhanced mechanical properties due to grain growth inhibition. Zr-added alloys show 490 ± 3 MPa ultimate tensile strength and 77.5 ± 0.7 HRB hardness after T4 tempering, compared to 460 ± 2.2 MPa and 73.7 ± 0.4 HRB for un-added alloys. Additionally, combining minor Zr addition and two-stage heterogenization resulted in finer Al3Zr dispersoids. Two-stage heterogenized alloys had an average Al3Zr size of 15 ± 5 nm, while one-stage heterogenized alloys had an average size of 25 ± 8 nm. A partial decrease in the mechanical properties of the Zr-free alloy was observed after two-stage heterogenization. The one-stage heterogenized alloy had 75.4 ± 0.4 HRB hardness after being T4-tempered, whereas the two-stage heterogenized alloy had 73.7 ± 0.4 HRB hardness after being T4-tempered.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Effects of Heterogenization Treatment on the Hot-Working Temperature and Mechanical Properties of Al-Cu-Mg-Mn-(Zr) Alloys

et al. 2023

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“…These alloys exhibit excellent mechanical properties including high strength, superior creep resistance and fracture toughness, fatigue life due to the formation of the fine and uniform dispersion of the -phase with plate-like shape on the {111} α planes of the aluminum matrix [1,2]. Numerous works were dealt with examination of the precipitation behavior and mechanical properties of these alloys [2][3][4][5]. However, the effect of precipitates produced by over-aging on workability of these alloys was considered in very limited number of studies [6] despite its importance for cold rolling and forging, where metal can be shaped through plastic deformation without introducing any defect.…”

Section: Introductionmentioning

confidence: 99%

Effect of Annealing on Structure and Mechanical Behavior of an AA2139 Alloy

Tagirov

Газизов

Kaibyshev

2014

MSF

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Abstract. An AA2139 alloy with a chemical composition of and an initial grain size of about 155 μm was subjected to annealing at 430°C for 3 h followed by furnace cooling. This treatment resulted in the formation of a dispersion of coarse particles having essentially plate-like shape. The over-aged alloy exhibits lower flow stress and high ductility in comparison with initial material in the temperature interval 20-450°C. Examination of microstructural evolution during high-temperature deformation showed localization of plastic flow in vicinity of coarse particles. Over-aging leads to transition from ductile-brittle fracture to ductile and very homogeneous ductile fracture at room temperature.

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“…Later, it was described 12) as being hexagonal, although the most widely accepted 13) structure of the phase is orthorhombic with lattice parameters a ¼ 0:496 nm, b ¼ 0:859 nm and c ¼ 0:848 nm. Teleshov et al 14) reported that a high Cu : Mg ratio of about 16 with 0.6% Ag increased considerably the strength of artificially-aged pressed strips at room and high temperatures. Additionally, the size and aspect-ratio evolutions of the phase have been only reported for the plateshape precipitates (thickening) and the results showed an increase in size with aging time.…”

Section: Introductionmentioning

confidence: 99%

Hardening Behavior in Aged Al-4%Cu-0.3%Mg Alloys with 0.5 and 2%Ag Additions

Palmerín¹,

Dorantes-Rosales²,

Hirata³

et al. 2009

Mater. Trans.

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The precipitation characterization of Al-4 mass% Cu-0.3 mass% Mg alloy with additions of 0.5 and 2 mass% Ag during aging treatments was carried out by transmission electron microscopy (TEM) and microhardness measurements. TEM observation of aged samples showed that the phase is the dominant phase and it is in coexistence with the 0 phase. Additionally, the phase has the morphology of polygonal prism (almost hexagonal) with flat interfaces and a thin thickness. The variation of the cube of mean radius of precipitates, r 3 , followed a linear relationship, as predicted by the Lifshitz, Slyosov and Wagner (LSW) theory for diffusion-controlled coarsening in both alloys. The coarsening process of the phase was slower in the aged Al-4 mass% Cu-0.3 mass% Mg-2 mass% Ag alloy. The decrease in hardness seems to be related to the coarsening of the phase and the loss of coherency.

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Temperature Ranges of Phase Transformations and Mechanical Properties of Alloys of the Al - Cu - Mg - Ag System with Various Cu/Mg Ratios

Cited by 15 publications

References 4 publications

Effects of Heterogenization Treatment on the Hot-Working Temperature and Mechanical Properties of Al-Cu-Mg-Mn-(Zr) Alloys

Effects of Heterogenization Treatment on the Hot-Working Temperature and Mechanical Properties of Al-Cu-Mg-Mn-(Zr) Alloys

Effect of Annealing on Structure and Mechanical Behavior of an AA2139 Alloy

Hardening Behavior in Aged Al-4%Cu-0.3%Mg Alloys with 0.5 and 2%Ag Additions

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