Softening Behavior During Annealing of Overaged and Cold-rolled Aluminum Alloy 7075

Souza, Saul Hissaci de; Padilha, Angelo Fernando; Kliauga, Andréa Madeira

doi:10.1590/1980-5373-mr-2018-0666

Cited by 10 publications

(5 citation statements)

References 11 publications

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“…al. 43 also found about 10 μm of precipitates size during the cold rolling of overaged aluminum alloy 7075. The SEM images of the optimized sample are shown in Figure 11(a) and (b).…”

Section: Resultsmentioning

confidence: 79%

Optimization of precipitate hardening parameters of 7075 aluminum alloy using response surface methodology

Yadav¹,

Padap²

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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In the present research work, combination of artificial aging (pre and post) and natural aging was performed on 7075 Al alloy. Aging parameters were optimized using response surface methodology model to get the maximum value of Vickers micro-hardness, hardness value, and tensile strength. Three factors with five levels each were used to develop the center composite rotatable design (CCRD-approach). The three factors were pre-artificial aging temperature, natural aging time, and post-artificial aging temperature. The contour plots, surface plots, and mean effects plots were drawn to study the effect of individual factors and interactions of the factors on micro hardness. The coefficient of the regression R2 was 0.9962 which shows the excellent accuracy of the developed model. One hundred and fifty-one percent increment in the micro hardness and 115% increment in the value of the ultimate tensile strength were observed in optimized sample compared to annealed sample. The Vickers micro-hardness, optical microstructural, tensile test, X-ray diffraction analysis, energy dispersive X-ray spectroscopy analysis, and fractography using scanning electron microscopy of fractured tensile specimen were conducted in this research work.

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“…al. 43 also found about 10 μm of precipitates size during the cold rolling of overaged aluminum alloy 7075. The SEM images of the optimized sample are shown in Figure 11(a) and (b).…”

Section: Resultsmentioning

confidence: 79%

Optimization of precipitate hardening parameters of 7075 aluminum alloy using response surface methodology

Yadav¹,

Padap²

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…The temperatures used were stipulated according to the literature 30 . explains that the ideal recrystallization temperature to be used in aluminum alloys that were previously cold-worked start from 340° up to 400 °C, but these temperatures and the rate of heating are specific for each alloy, and have to be carefully studied 31 . also studied the recrystallization of an aluminium alloy, the 7075.…”

Section: Methodsmentioning

confidence: 99%

Recrystallization Study of the Al4.5wt%Cu Alloy Conventionally and Unidirectionally Solidified, Deformed and Heat Treated

et al. 2020

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The Al4.5wt%Cu is an aeronautical and automobile alloy with extensive use in industry for structural purposes. The aim of this work was to evaluate two different solidification processes of the Al4.5wt%Cu alloy, conventional and unidirectional, as well as its recrystallization process. Firstly, the Al4.5wt%Cu alloy was deformed by cold rotary forging and then heat treated at temperatures that varied from 250 to 450 °C. The samples for analysis were obtained after 54, 76 and 91% of reductions in area. Tests of optical microscopy, scanning electron microscopy and Vickers microhardness were performed to evaluate the recrystallization process. The results indicated that the recrystallization started at 350 ºC, being that the conventional samples presented full recrystallization after 5 minutes, while the unidirectional samples presented only partial recrystallization. In general, both solidification processes presented similar results for all of the analysis performed.

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“…For the present temperatures during FE, Fig. 6, precipitates may dissolve or coarsen [44][45][46], i.e. affecting the present precipitation hardening, resulting in yield and ultimate tensile strength in typical ranges for AA7075 after annealing heat treatment [45].…”

Section: Mechanical Properties Of Extruded Wiresmentioning

confidence: 99%

Changes in processing characteristics and microstructural evolution during friction extrusion of aluminum

et al. 2022

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This study focuses on characterizing the microstructural evolution of the aluminum alloy 7075 in the friction extrusion process under different extrusion forces and die angles. Depending on these conditions, two fundamentally different extrusion types are found, showing significant differences in the process characteristics and microstructural evolution. One of the two extrusion types is associated with high extrusion force and low die angle, leading to fully recrystallized wires with average grain size around 1.2 $$\upmu$$ μ m. The microstructural analysis indicates that the microstructure present in the wires is generated in the charge material by the combination of tool geometry, load induced material flow and friction conditions in the initial stages of the friction extrusion process. The identified processing conditions and influencing factors introduce an alternative route for friction extrusion at low extrusion ratios, capable of producing completely refined wires.

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Softening Behavior During Annealing of Overaged and Cold-rolled Aluminum Alloy 7075

Cited by 10 publications

References 11 publications

Optimization of precipitate hardening parameters of 7075 aluminum alloy using response surface methodology

Optimization of precipitate hardening parameters of 7075 aluminum alloy using response surface methodology

Recrystallization Study of the Al4.5wt%Cu Alloy Conventionally and Unidirectionally Solidified, Deformed and Heat Treated

Changes in processing characteristics and microstructural evolution during friction extrusion of aluminum

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