Structure of Al-Mg-Si Cast and Extruded Rods for Die Forgings

Luštinec, Jan; Očenášek, Vladivoj; Jelı́nek, M.

doi:10.21062/ujep/x.2016/a/1213-2489/mt/16/5/1009

Cited by 6 publications

(1 citation statement)

References 5 publications

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“…Effect of the initial structure state on the forged microstructure of the 6082 alloy[46]. (a) Forging from the cast non-homogenized rod-surface area.…”

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confidence: 99%

Flow Stress and Hot Deformation Activation Energy of 6082 Aluminium Alloy Influenced by Initial Structural State

Schindler

Kawulok

Očenášek

et al. 2019

Metals

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Stress-strain curves of the EN AW 6082 aluminium alloy with 1.2 Si-0.51 Mg-0.75 Mn (wt.%) were determined by the uniaxial compression tests at temperatures of 450–550 °C with a strain rate of 0.5–10 s−1. The initial structure state corresponded to three processing types: as-cast structure non-homogenized or homogenized at 500 °C, and the structure after homogenization and hot extrusion. Significantly higher flow stress appeared as a result of low temperature forming of the non-homogenized material. Hot deformation activation energy Q-values varied between 99 and 122 kJ·mol−1 for both homogenized materials and from 200 to 216 kJ·mol−1 for the as-cast state, while the Q-values calculated from the measured steady-state stress were always higher than those calculated from the peak stress values. For the extruded state of the 6082 alloy, the physically-based model was developed to reliably predict the flow stress influenced by dynamic softening, temperature, strain rate, and true strain up to 0.6.

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“…Effect of the initial structure state on the forged microstructure of the 6082 alloy[46]. (a) Forging from the cast non-homogenized rod-surface area.…”

mentioning

confidence: 99%

Flow Stress and Hot Deformation Activation Energy of 6082 Aluminium Alloy Influenced by Initial Structural State

Schindler

Kawulok

Očenášek

et al. 2019

Metals

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Natural Aging Behaviour of the EN AW 6082 and Lead Free EN AW 6023 Aluminium Alloys

Fujda¹,

Matvija²,

Glogovský³

et al. 2017

Manufacturing Technology

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The natural aging behaviour of EN AW 6082 aluminium alloy and lead-free EN AW 6023 aluminium alloy with good free cutting machinability was investigated using Vickers microhardness measurements, tensile test analysis, and a light microscopy characterisation. The different chemical composition of the analysed alloys did not affect the alloys microhardness after quenching, but the solid solution grain sizes of the quenched alloys differed greatly. The microhardness and tensile strength of EN AW 6082 increased with aging time right after alloy quenching. On the contrary, microhardness and tensile strength of lead-free EN AW 6023 increased markedly until after 500 hours of natural aging. The natural aging of the 6023 alloy could be suppressed by the formation of Sn-vacancy pairs after alloy quenching that impede the strengthening clusters formation. Finer grains of solid solution that were found in the 6023 alloy microstructure resulted in higher tensile strength and lower ductility of the 6023 alloy compared to the 6082 alloy, even though the microhardness of the naturally aged 6023 alloy state was lower.

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Influence of the Heat Treatment on Corrosion Behaviour and Mechanical Properties of the AA 7075 Alloy

Kučera¹,

Vojtěch²

2017

Manufacturing Technology

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Al-Zn-Mg-Cu alloys possess excellent mechanical properties, and therefore are used in aerospace and automotive industry. However, they are susceptible to localized corrosion such as pitting, intergranular and exfoliation corrosion, which is closely related to the precipitate size and distribution. Because the size and distribution of the precipitates are controlled by heat treatment, we investigated the influence of the heat treatment on corrosion behaviour and mechanical properties of the AA 7075 alloy. Audi test, internal Audi standard PV 11 13 for automotive industry, was chosen to evaluate the corrosion behaviour of the as-cast, T5 and T6 heat treated aluminium alloy 7075. Mechanical properties were studied through the tensile test and hardness measurements. The highest corrosion rate and the depth of corrosion attack penetration were observed for the T5 state, while the T6 state evinced the best resistance to localized corrosion and the highest mechanical properties.

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Structure of Al-Mg-Si Cast and Extruded Rods for Die Forgings

Cited by 6 publications

References 5 publications

Flow Stress and Hot Deformation Activation Energy of 6082 Aluminium Alloy Influenced by Initial Structural State

Flow Stress and Hot Deformation Activation Energy of 6082 Aluminium Alloy Influenced by Initial Structural State

Natural Aging Behaviour of the EN AW 6082 and Lead Free EN AW 6023 Aluminium Alloys

Influence of the Heat Treatment on Corrosion Behaviour and Mechanical Properties of the AA 7075 Alloy

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