Improvement of ultimate tensile strength by artificial ageing and retrogression treatment of aluminium alloy 6061

Abúndez, Arturo; Pereyra, Isa; Campillo, B.; Serna, S.; Alcudia, Enrique; Molina, Arturo; Ortega, Andrés Blanco; Mayén, Jan

doi:10.1016/j.msea.2016.05.062

Cited by 48 publications

(19 citation statements)

References 23 publications

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“…With growing interest in Al-Mg-Si(-Cu) alloys in the automotive industry and the understanding of hardening precipitation (Jacobs et al [1], Ryum et al [2], Murayama et al [3], C. Barbosa [4], Banhart et al [5]) and the dierent eects of silicon/magnesium excess (Matsuda et al [6], Ding et al [7], Jaafar et al [8]), many studies about control and improvement of thermal treatments and its link with mechanical properties have been made (Abúndez et al [9], Farshidi et al [10], Ma et al [11], Ambriz et al [12], Maisonnette et al [13], Mrówka-Nowotnik and Sieniawski [14]). Among those, few focus on the inuence of the quench (Cavazos and Colás [15,16], Strobel et al [17]) in addition, since most of these works have been conducted on thin samples the quenching rate variation across thickness is not a key parameter.…”

Section: Introductionmentioning

confidence: 99%

Correlation between quenching rate, mechanical properties and microstructure in thick sections of Al Mg Si( Cu) alloys

Garric

Colas

Donnadieu

et al. 2019

Materials Science and Engineering: A

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Section: Introductionmentioning

confidence: 99%

Correlation between quenching rate, mechanical properties and microstructure in thick sections of Al Mg Si( Cu) alloys

Garric

Colas

Donnadieu

et al. 2019

Materials Science and Engineering: A

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“…6xxx series aluminium alloys are highly suitable materials for the structural, building, machinery, marine (ocean ships) and automotive industry due to their good weldability, good strength/weight ratios, and excellent formability capabilities. Moreover, these alloys have recently been used in aircraft fuselages (such as the Airbus A380) due to their lower costs compared with conventional 2xxx series aluminium alloys …”

Section: Introductionmentioning

confidence: 99%

Investigation of the relationship between intergranular corrosion and retrogression and reaging in the AA6063

Özer

Kısasöz

Karaaslan

2019

Materials & Corrosion

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AA6063 was heat treated with different retrogression temperatures and durations, and the effect of heat treatment conditions on the microstructure, hardness, electrical conductivity, intergranular corrosion (IGC) and electrochemical corrosion behaviours of the AA6063 was determined compared with the T6 condition. The IGC test was applied according to the BS EN ISO 11846: 2008 standard. Moreover, potentiodynamic polarization tests were applied to determine the electrochemical corrosion behaviour of the heat-treated samples.Electrochemical corrosion tests were carried out by using a Ivium Compactstat potentiostat in 3.5 wt.%. NaCl solution at 24°C with a scanning rate of 0.5 mV/s. The corrosion test cell consisted of the reference electrode (Ag/AgCl), working electrode (test sample) and a reference electrode (platinum). The effect of IGC on the microstructure of AA6063 and corrosion depth values was investigated by using a stereo optical microscope and a light metal microscope, respectively. Corrosion depth examinations were performed on microstructures taken from the cross-sections of the samples. The chemistry of the precipitates formed at grain boundaries and distribution of the precipitates in the microstructure were investigated by scanning electron microscope, energy dispersive X-ray and transmission electron microscope analyses. The results showed that retrogression and reaging heat treatment improves both the corrosion resistance and the mechanical properties of AA6063. After 50°C/15 min RRA heat treatment, the highest corrosion resistance and a higher hardness value than the T6 level were obtained. K E Y W O R D SAA6063, electrochemical corrosion, intergranular corrosion, retrogression and reaging

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“…Good stamping formability is very adaptable to the processing method of the part. However, the plastic bendability of the aluminum alloy is very poor at room temperature, but the mechanical properties of the heat-treated aluminum alloy will be significantly improved [5][6][7]. After bending, springback is an inevitable and universal phenomenon for the part because of the elastic recovery when the loading is removed, affecting the shape and dimensional accuracy of the formed parts seriously [8].…”

Section: Introductionmentioning

confidence: 99%

Effect of heat treatment conditions on stamping deformation and springback of 6061 aluminum alloy sheets

Wang

Zhu

Kou

et al. 2019

Mater. Res. Express

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The stamping deformation and springback of the 6061 aluminum alloy sheets under different heat treatment conditions were investigated by three-point bending tests. A validated reliable finite element (FE) model was used to further reveal the springback mechanism. It was found that the heat treatment conditions have great influence on the stamping deformation and springback of 6061 aluminum alloy sheets. The most severe local deformation occurred at the punch position of the T6-8 h alloy sheet, showing minimum bending radius and thickness. However, the bending radius and thickness of the homogenization treated (HT) alloy sheet were maximum, resulting from more materials participate in bending deformation. The HT and solution treated (ST) alloys exhibited higher stamping performance than that of the natural aged (NA) and T6 alloys. The material strength of the T6 alloys can be improved by aging time, motivating greater springback and neutral layer offset. The springback and neutral layer offset of the T6-8 h alloy sheet were the highest, while the HT alloy sheet was the lowest. Furthermore, the effect of material parameters on stamping deformation and springback of sheet was studied by combining with theoretical analysis and experimental results. The research showed that the bending radius and thickness of the sheet in the fillet region increase with the increase of strain-hardening exponent and elongation and with the decrease of yield ratio. After unloading, springback angle and radius increase with the increase of yield strength and strength factor and with the decrease of strain-hardening exponent. These achievements may serve as a guideline for enhancing stamping performance and reducing springback of the aluminum alloy sheet in bending process.

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Improvement of ultimate tensile strength by artificial ageing and retrogression treatment of aluminium alloy 6061

Cited by 48 publications

References 23 publications

Correlation between quenching rate, mechanical properties and microstructure in thick sections of Al Mg Si( Cu) alloys

Correlation between quenching rate, mechanical properties and microstructure in thick sections of Al Mg Si( Cu) alloys

Investigation of the relationship between intergranular corrosion and retrogression and reaging in the AA6063

Effect of heat treatment conditions on stamping deformation and springback of 6061 aluminum alloy sheets

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