Effect of aging treatment on evolution of S′ phase in rapid cold punched Al−Cu−Mg alloy

Hu, Ze-yi; Fan, Changzheng; Shen, Tong; Ou, Ling; Dai, Nan-shan; Wang, Lu

doi:10.1016/s1003-6326(21)65627-3

Cited by 14 publications

(6 citation statements)

References 18 publications

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“…The histogram of the size distribution of coarse second phase or inclusion is depicted in Figure 16, and the relationship between the grain size of the second phase and the strength of the alloy is illustrated in Figure 17. The precipitated phase size and grain size followed the same trend without considering the difference between the two microstructures of 211Z.X alloy (Figures [15][16][17]. In other words, the increase in grain size led to the growth of long and short diameters of the second phase (Figure 15).…”

Section: Relationship Between the Size Of The Second Phase Grain Size...mentioning

confidence: 62%

“…The main alloy elements Cu, Mg, Mn, and Zn have certain strengthening effects on aluminum alloys, but their main role is to improve the heat and corrosion resistances of the material [8,13,14]. Furthermore, small numbers of auxiliary elements, such as Ni, Ti, Cr, Zr, and B, exist in alloys, which can further improve their properties [13][14][15][16][17][18]. However, the Fe and Si elements are harmful impurity elements for aluminum alloys with high strength and should be avoided as much as possible [7,19].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Microstructure on High Cycle Fatigue Behavior of 211Z.X-T6 Aluminum Alloy

Zhong

Huang

Chen

et al. 2022

Metals

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In the present paper, the high cycle fatigue (HCF) of a novel 211Z.X aluminum alloy with high strength was studied under hot-rolling and as-cast states at room temperature. The effects of microstructure and distribution of precipitated phases and impurities on the mechanical properties, HCF performances, fatigue microcrack initiation, and propagation behavior of the 211Z.X alloy were studied by transmission electron microscopy (TEM), scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS). The HCF S–N curves, P–S–N curves and Goodman fatigue diagrams of 211Z.X alloy consisting of two microstructures were drawn. The results suggested that the fine and dispersive distribution of the second phases improved the strength of the alloy. The formation of short-bar and spherical precipitates promoted coordinated deformation of the alloy. This promoted higher microcrack initiation resistance of 211Z.X alloy with a hot rolling state than in the cast state. As a result, the HCF properties of the hot-rolling alloy were better than those of the cast alloy. In sum, these results look promising for future reliable design of engineering structures and application of new aluminum alloys.

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Section: Relationship Between the Size Of The Second Phase Grain Size...mentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Effect of Microstructure on High Cycle Fatigue Behavior of 211Z.X-T6 Aluminum Alloy

Zhong

Huang

Chen

et al. 2022

Metals

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“…In recent years, the study of 2024 aluminum alloy mainly focuses on the effect of plastic deformation and heat treatment on the microstructure and properties of the alloy. The nano-size precipitates can be obtained in the alloy by combining solution and aging, which is the main reason for the high strength of the alloy [ 6 , 13 , 14 , 15 , 16 , 17 ]. The main function of plastic deformation is to refine the grain size, homogenize the microstructure and densify the structure of the alloy.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Extrusion and Heat Treatment on the Microstructure and Tensile Properties of 2024 Aluminum Alloy

Zhang

Wang

et al. 2022

Materials

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Hot extrusion forming is one of the best cost-effective processing methods to obtain high-strength aluminum alloys. In order to obtain high performance 2024 aluminum alloy for the aero and automobile industries, this research comprehensively uses heat treatment and reverse isothermal extrusion technology to prepare 2024 alloy. The effects of homogenization, extrusion and post-extrusion annealing treatment on the microstructure and mechanical properties of 2024 aluminum alloy were discussed in detail. The results indicate that the grain refinement of the extruded alloy material is significant. The coarse eutectic microstructure at the grain boundaries was refined, and these grains tended to be uniformly distributed after the annealing treatment. Extruded 2024 aluminum alloy material mainly has S (Al2CuMg) and Al7Cu2Fe second phases. The appearance of a large number of S phases led to a significant improvement in the properties of the alloy with an increase in tensile strength and elongation of 176% and 547%, respectively. In addition, EBSD analysis showed a significant meritocratic growth in the extrusion direction with the appearance of Copper {112} <111> rolling weaving, which led to process hardening and the strength improvement of the alloy.

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“…When the temperature reached 570 °C, the relative sintering density of the alloy reached 98.6%, nearly fully dense. At 490 °C, the bonding between the metal particles is not strong, and Cu diffuses into the Al particles, leaving voids at original Cu positions; therefore, the sintering density is low [17]. At 510 °C, owing to the occurrence of a eutectic reaction, a liquid phase was generated locally in the alloy, leading to an increment in the pores of the alloy, and swelling occurred.…”

Section: Properties Of the Alloymentioning

confidence: 99%

Effect of sintering temperature on the microstructure and properties of Al–7.5Cu–1Si alloy

Zhang,

Deng,

Shou

et al. 2024

Mater. Res. Express

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With increasing requirements for environmental protection and energy conservation, Al–Cu powder alloys play an important role in machine weight reduction. During the preparation of the Al–Cu powder alloy, an appropriate sintering temperature helps improve the comprehensive performance of the alloys. In this study, powder metallurgy was used to prepare Al–7.5Cu–1Si alloys, and the effects of different sintering temperatures on their relative sintering density, hardness, and tensile strength were studied. The microstructure and phase composition of the alloy were observed and analyzed by scanning electron microscopy and X-ray diffraction, and the mechanical properties of the alloy were studied using a Brinell hardness tester and a universal material testing machine. By analyzing the microstructural changes of the alloys at different sintering temperatures, the optimal sintering temperature of the alloy was determined to obtain the best properties. The results demonstrated that the sintering temperature significantly affected the diffusion and migration of the metal particles inside the alloy. When the temperature was low, numerous pores were present in the alloy, and the degree of bonding between the metal particles was poor. As the temperature increased, the number of pores in the alloy decreased, and good metallurgical bonding occurred between the particles. The relative densities and mechanical properties of the alloys were significantly affected by the sintering temperature. When the temperature was below 570 ℃, the relative density and mechanical properties were low. At 590 ℃, the alloy underwent deformation and was in an over-sintered state. The best sintering temperature was 570 ℃. This is because at this temperature, the relative sintering density, hardness, and tensile strength of the alloy all reached maximum values, which were 98.6%, 71 HB, and 153 MPa, respectively.

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Effect of aging treatment on evolution of S′ phase in rapid cold punched Al−Cu−Mg alloy

Cited by 14 publications

References 18 publications

Effect of Microstructure on High Cycle Fatigue Behavior of 211Z.X-T6 Aluminum Alloy

Effect of Microstructure on High Cycle Fatigue Behavior of 211Z.X-T6 Aluminum Alloy

The Effect of Extrusion and Heat Treatment on the Microstructure and Tensile Properties of 2024 Aluminum Alloy

Effect of sintering temperature on the microstructure and properties of Al–7.5Cu–1Si alloy

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