Comparison of Hot Deformation Behavior Characteristics Between As-Cast and Extruded Al-Zn-Mg-Cu (7075) Aluminum Alloys with a Similar Grain Size

Jeong, Hyein; Kim, W J

doi:10.3390/ma12233807

Cited by 22 publications

(5 citation statements)

References 35 publications

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“…It is known that metal behaviour at hot deformation and, correspondingly, the stability of the process can be influenced by the following factors: manufacturing method and the quality of primary workpiece [6], presswork method [7], temperature and presswork velocity [8][9][10], strain degree [11], type of lubricants [12], presence of macro-structure defects in a cast blank [13,14], etc.…”

Section: Statement Of Problemmentioning

confidence: 99%

Evaluating Plasticity of Alloy AD31 on Ingot Height

Smyrnov¹,

Sklyar²,

Parpiev³

2021

SSP

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The authors present the results of evaluating the distribution of plastic properties on the height of a log ingot with the diameter of 145 mm, obtained by means of semi-continuous casting, from the aluminum alloy AD31. The authors study semi-continuous alloys of three manufacturers. One part of ingots was obtained with the use of only primary aluminum, secondary raw materials and secondary raw materials with the addition of primary aluminum. With the purpose of stabilizing the process of presswork the authors define the values of yield stress in the ingot lower and upper parts and study its microstructure. The research was conducted for the ingots without thermal treatment after accelerated homogenization. It is shown that the ingots, produced with the use of primary aluminum only, have less scattered plastic properties in terms of the height. That is why, for the case of press-working the items with thin components, it is reasonable to use the ingots from primary aluminum.

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Section: Statement Of Problemmentioning

confidence: 99%

Evaluating Plasticity of Alloy AD31 on Ingot Height

Smyrnov¹,

Sklyar²,

Parpiev³

2021

SSP

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show abstract

“…Meanwhile, some innovative heat treatments have been developed. Although recent literature shows the microstructure evolution of Al-Zn-Mg-Cu alloy during hot deformation [3][4][5][6], the detailed effect of deformation temperature on microstructure and mechanical properties of grain heat treatment is rarely reported.…”

Section: Introductionmentioning

confidence: 99%

Regulate and Control Grain Structure Characteristics and Mechanical Properties Control of Al-Zn-Mg-Cu Alloy

Shi

Yan

et al. 2022

KEM

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Grain characteristics are one of the most important factors in determining alloy properties. Thermal deformation and solution treatment experiments were used to investigate the evolution of grain features and mechanical properties of Al-9.39 Zn-1.92 Mg-1.98 Cu alloy. The results reveal that when the deformation temperature rises, the recrystallized grain size, recrystallization fraction, and sub-grain size for the alloy's final microstructure gradually increase. The recrystallized grain size and fraction increase as the solution temperature rises, although the sub-grain size of the final microstructure of the corresponding alloy changes slightly. Fitting is used to deriving the function of recrystallization size, recrystallization fraction, and sub-grain size as a function of deformation temperature. The tensile properties of the alloy at T6 state are the best after deformation at 400°C and solution treatment at 470°C. The brittle fracture mode is shown in recrystallized grains, whereas the toughness fracture mode is shown in sub-grains.

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“…The properties of MMCs are more sensitive to morphology, type and size of reinforcements, and method of fabrication [ 10 , 11 , 12 , 13 ]. Extruded parts (Aluminium and Magnesium-based composites) resulted in high tensile strength and refined microstructure properties compared to casted components [ 14 , 15 ]. Significant attention is thus required for the development of novel lightweight composites through extrusion routes, suitable for engineering applications.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Behaviour of High-Strength Al 7005 Alloy and Its Composites Reinforced with Industrial Waste-Based Fly Ash and Glass Fibre: Comparison of Stir Cast and Extrusion Conditions

et al. 2021

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The stringent demand to develop lightweight materials with enhanced properties suitable for various engineering applications is the focus of this research work. Industrial wastes such as fly ash (FA) and S-glass-fibres (GF) were used as reinforcement materials for high-strength alloy, i.e., Al 7005. Stir casting routes were employed for fabricating the four samples, Al 7005, Al 7005 + 5% GF, Al 7005 + 6% FA and Al 7005 + 5% GF + 6% FA. The extrusion process with different extrusion ratios (ER: 5.32:1, and 2.66:1) was used to examine the properties of all four samples. Extruded samples with ER: 5.32: 1 resulted in equiaxed grains with refined structure compared to stir casting parts. The effect of the extrusion process and the addition of reinforcements (GF and FA) on the gravimetric, electrochemical, and electrochemical impedance corrosion behaviour of Al 7005 composites in 1M HCl (Hydrochloric acid) solution were investigated. The results of all three corrosion methods showed that Al 7005 + 6% FA exhibited higher corrosion resistance. Corrosion rate of Al 7005, Al 7005 + 5% GF, Al 7005 + 6% FA and Al 7005 + 5% GF + 6% FA is found equal to 3.25, 2.41, 0.34, and 0.76 mpy, respectively. The FA particles remain inert and act as a physical barrier with corrosive media during the corrosion test. GF undergoes fibre degradation or disrupts the continuity of the glass network as a result of fibre leaching, which increases the corrosion rate in the sample. The gravimetric study showed that the corrosion rates decreased with an increase in extrusion ratio, which might be due to corrosion passivation increases and improved properties. The scanning electron microscopy reveals that corrosion fits, flakes and micro-cracks were observed more in the as-cast composites than that of extrusion composites, promoting the corrosion rate.

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Comparison of Hot Deformation Behavior Characteristics Between As-Cast and Extruded Al-Zn-Mg-Cu (7075) Aluminum Alloys with a Similar Grain Size

Cited by 22 publications

References 35 publications

Evaluating Plasticity of Alloy AD31 on Ingot Height

Evaluating Plasticity of Alloy AD31 on Ingot Height

Regulate and Control Grain Structure Characteristics and Mechanical Properties Control of Al-Zn-Mg-Cu Alloy

Corrosion Behaviour of High-Strength Al 7005 Alloy and Its Composites Reinforced with Industrial Waste-Based Fly Ash and Glass Fibre: Comparison of Stir Cast and Extrusion Conditions

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