Kinetic study of an AA7075 alloy under RRA heat treatment

Luiggi, Ney; Valera, M. del V.

doi:10.1007/s10973-017-6683-8

Cited by 10 publications

(4 citation statements)

References 46 publications

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“…Following heat treatment to a T6 state, the CG T6 sample was heated to retrogression temperature and aged for a short time. Following RRA treatment, the resultant microstructure was more thermodynamically stable, and consisted of a greater number of bigger precipitates when compared to those formed due to the T6 heat treatment only [40]. Previous work showed that RRA reduced the corrosion depth of AA 7075, while mechanical strength remained high if parameters were optimized [41].…”

Section: The Influence Of Microstructure Evolution On Mechanical Prop...mentioning

confidence: 95%

Increasing the Mechanical Strength and Corrosion Resistance of Aluminum Alloy 7075 via Hydrostatic Extrusion and Aging

et al. 2022

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The present study investigates the correlation between mechanical properties and resistance to corrosion of hydrostatically extruded aluminum alloy 7075. Supersaturated solid solutionized samples undergo a plastic deformation process, followed by both natural and artificial aging. Furthermore, two types of hydrostatic extrusion are applied to the samples: single-stepped and double-stepped. This process is shown to influence grain refinement and the precipitation process, resulting in changes in the electrochemical properties of the samples. Hydrostatic extrusion combined with aging is shown to cause an increase in mechanical strength ranging from 50 MPa to 135 MPa in comparison to coarse-grained sample subjected to T6 heat treatment. The highest value of tensile strength is obtained for a sample subjected to single-step hydrostatic extrusion followed by natural aging. This strength increase is caused by refinement of the microstructure, in addition to the small size and number of precipitates at the grain boundaries, which are coarsened by artificial aging. Hydrostatic extrusion is also shown to increase resistance to corrosion, with the T6-treated coarse-grained sample being most susceptible to corrosion attack.

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Section: The Influence Of Microstructure Evolution On Mechanical Prop...mentioning

confidence: 95%

Increasing the Mechanical Strength and Corrosion Resistance of Aluminum Alloy 7075 via Hydrostatic Extrusion and Aging

et al. 2022

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“…One of the primary difficulties arises from strengthening precipitates, such as the metastable phase η′(eta-prime), which can be susceptible to over-aging during welding. This over-aging can lead to a reduction in the alloy's mechanical properties and toughness in the heat-affected zone (HAZ) adjacent to the weld [ 24 , 25 ]. Additionally, the T6 condition typically involves the formation of a dispersion of fine, coherent precipitates throughout the aluminum matrix, which can affect the weldability and heat transfer characteristics of the alloy.…”

Section: Introductionmentioning

confidence: 99%

Nanomechanical, mechanical and microstructural characterization of electron beam welded Al2219-T6 tempered aerospace grade alloy: A comprehensive study

Hussain,

Shehbaz,

Alkahtani

et al. 2024

Heliyon

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“…The beneficial effect to the high strength of AA7000 by the strengthening precipitates are also responsible for the lowering corrosion resistance of the alloys [10,12,13]. Finely dispersed intermetallic precipitates, including Cu-, Fe-, and Mg-rich intermetallics [14,15] create a micro-galvanic coupling with the matrix (i.e., electrochemical potential gradient), making the alloys susceptible to pitting, galvanic, and intergranular corrosion.…”

Section: Introductionmentioning

confidence: 99%

Effect of microstructural rearrangement as a result of annealing on the corrosion behavior of 7075 aluminum alloy

Anawati,

Aliyah,

Tanji

et al. 2023

Mater. Res. Express

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Understanding of the relationship between microstructural change and corrosion behavior is essential for achieving the optimum benefit of strengthening precipitates in providing high strength without sacrificing the corrosion resistance of 7000 series aluminum alloys. This work aims at revealing the relationship between the microstructural rearrangement and corrosion behavior of a 7075 series aluminum alloy as a result of annealing at the temperature range of 300 – 600 °C. Microstructural observation indicated a gradual dissolution of Cu in the solid solution matrix with increasing annealing temperature. At 600 °C, a formation of segregated Al2Cu phase occurred along the grain boundaries. After subjected to corrosion tests, exfoliation corrosion was observed on the as-received specimen, as well as on the specimens annealed at 300, 400 and 500 °C, whilst an intergranular corrosion occurred on that annealed at 600 °C. The corrosion resistance was higher on the specimen annealed at 500 °C compared those annealed at other temperatures, as the result of Cu enrichment the solid solution matrix.

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Kinetic study of an AA7075 alloy under RRA heat treatment

Cited by 10 publications

References 46 publications

Increasing the Mechanical Strength and Corrosion Resistance of Aluminum Alloy 7075 via Hydrostatic Extrusion and Aging

Increasing the Mechanical Strength and Corrosion Resistance of Aluminum Alloy 7075 via Hydrostatic Extrusion and Aging

Nanomechanical, mechanical and microstructural characterization of electron beam welded Al2219-T6 tempered aerospace grade alloy: A comprehensive study

Effect of microstructural rearrangement as a result of annealing on the corrosion behavior of 7075 aluminum alloy

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