Effect of over-aging on the microstructural evolution in an Al–Cu–Mg–Ag alloy during ECAP at 300°C

Газизов, М. Б.; Kaibyshev, Rustam

doi:10.1016/j.jallcom.2012.02.144

Cited by 37 publications

(37 citation statements)

References 29 publications

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“…In this process, ingots were cast by the vertical process in which the molted alloy was poured into a water-cooled mold. Then, ingots were subjected to a two-step homogenization annealing at 360 1C for 6 h, followed by subsequent heating to 510 1C and soaking for 24 h [24,25]. After homogenization annealing these ingots were extruded at $ 400 1C with an extrusion ratio of 2.6:1 to rods with a diameter of 50 mm.…”

Section: Methodsmentioning

confidence: 99%

“…The microstructure of the alloy in as-quenched condition has been described in detail in previous works [7,24,25]. Boundary particles of the primary θ-phase and ternary W-phase play no role in dispersion hardening.…”

Section: Deformation Microstructurementioning

confidence: 99%

“…However, their distribution is non-uniform, and their volume fraction is low [24]. As a result, this dispersion may affect the formation of dislocation structures only locally within separate initial grains [25]. The dislocation density in the as-quenched condition was low…”

Section: Deformation Microstructurementioning

confidence: 99%

“…16). This deviation is attributed to the high density of the thickening ledge [4,8,17,25] on the semi-coherent board interfaces. Therefore, the deformation banding leads to the appearance of relatively coarse platelets of the Ω-phase along the {111} α plane with a semi-coherent interface due to heterogeneous nucleation and accelerated growth at dislocation boundaries or boundaries of shear bands.…”

Section: Precipitation Behavior During Agingmentioning

confidence: 99%

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Effect of pre-straining on the aging behavior and mechanical properties of an Al–Cu–Mg–Ag alloy

Газизов

Kaibyshev

2015

Materials Science and Engineering: A

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a b s t r a c tThe effects of cold deformation prior to aging on the precipitation behavior, microstructure and mechanical properties of an Al-5.6Cu-0.72 Mg-0.5Ag-0.32Mn-0.17Sc-0.12Zr (in wt%) alloy were investigated. Pre-straining disrupts the formation of Mg-Ag co-clusters, modifying the normal precipitation sequence. A strong increase in the dislocation density by a factor of 100 leads to a $ 40% decrease in the number density, N V , of the Ω-phase at pre-strains of εZ1% (εZ 0.01). The aspect ratios of the platelets in this phase increased from $ 21 to $ 42 after a negligible pre-strain of r1% (ε r0.01) and further decreased to $ 25 in the pre-strain interval of 1-80% (ε $ 0.01-1.61). In addition, the nucleation of the Cu-rich θ 0 -phase occurs on dislocations. The heterogeneous nucleation of the thick Ω-phase particles with low aspect ratios ( $ 12) and equiaxed particles of S-phase with dimensions r5 nm on the deformation-induced boundaries was found. After peak aging, the yield stress (YS) and ultimate tensile strength (UTS) increased from 4787 4 MPa and 522 78 MPa for the as-quenched alloy to 516 7 4 MPa and 568 7 6 MPa in the longitudinal and 5547 5 MPa and 601 73 MPa in the transversal directions, respectively, for the alloy subjected to pre-straining with a rolling reduction of 80% (ε $ 1.61). Cold rolling prior to aging induces the anisotropy in mechanical behavior through the formation of deformation bands.

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Section: Methodsmentioning

confidence: 99%

Section: Deformation Microstructurementioning

confidence: 99%

Section: Deformation Microstructurementioning

confidence: 99%

Section: Precipitation Behavior During Agingmentioning

confidence: 99%

See 2 more Smart Citations

Effect of pre-straining on the aging behavior and mechanical properties of an Al–Cu–Mg–Ag alloy

Газизов

Kaibyshev

2015

Materials Science and Engineering: A

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“…The details of sample preparation for structural characterization by transmission electron microscopy (TEM), scanning electron microscopy (SEM) and phase analysis, techniques used for estimation of the volume fraction of the secondary phase particles, the average dislocation density were described in previous works [6] in details. TEM studies were performed on fractured samples which were at an initial strain rate of 5.6×10 −3 s −1 at different temperatures.…”

Section: Methodsmentioning

confidence: 99%

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

Tagirov

Газизов

Kaibyshev

2014

MSF

Self Cite

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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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Laser welding of the high-strength Al–Cu–Li alloy

Маликов

Orishich

2017

Int J Adv Manuf Technol

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Effect of over-aging on the microstructural evolution in an Al–Cu–Mg–Ag alloy during ECAP at 300°C

Cited by 37 publications

References 29 publications

Effect of pre-straining on the aging behavior and mechanical properties of an Al–Cu–Mg–Ag alloy

Effect of pre-straining on the aging behavior and mechanical properties of an Al–Cu–Mg–Ag alloy

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

Laser welding of the high-strength Al–Cu–Li alloy

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