Influence of heat treatment on the microstructure and mechanical properties of 6005 and 6082 aluminium alloys

Mrówka‐Nowotnik, G.; Sieniawski, Jan

doi:10.1016/j.jmatprotec.2005.02.115

Cited by 214 publications

(112 citation statements)

References 12 publications

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“…The microstructure consists of coarse grains including the α-Al dendrites and several precipitates in the interdendritic regions. In the as-cast state, wellknown precipitates such as rod-like shaped eutectic Mg 2 Si, skeleton shaped α-AlFeMnSi and β-AlFeSi exist in the interdendritic regions [12][13]. The average grain size for the Alloy A was 496,67 µm ± 180 in diameter and 432,52 µm ± 167 in diameter for Alloy B in as-cast state.…”

Section: Experimental Studymentioning

confidence: 99%

Microstructural and Mechanical Characterization of Al-0.80Mg-0.85Si-0.3Zr Alloy

Kahrıman

Zeren

2017

Archives of Foundry Engineering

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In this study, Al-0.80Mg-0.85Si alloy was modified with the addition of 0.3 wt.-% zirconium and the variation of microstructural features and mechanical properties were investigated. In order to produce the billets, vertical direct chill casting method was used and billets were homogenized at 580 °C for 6 h. Homogenized billets were subjected to aging practice following three stages: (i) solution annealing at 550 °C for 3 h, (ii) quenching in water, (iii) aging at 180 °C between 0 and 20 h. The hardness measurements were performed for the alloys following the aging process. It was observed that peak hardness value of Al-0.80Mg-0.85Si alloy increased with the addition of zirconium. This finding was very useful to obtain aging parameters for the extruded hollow profiles which are commonly used in automotive industry. Standard tensile tests were applied to aged profiles at room temperature and the results showed that modified alloy had higher mechanical properties compared to the non-modified alloy.

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Section: Experimental Studymentioning

confidence: 99%

Microstructural and Mechanical Characterization of Al-0.80Mg-0.85Si-0.3Zr Alloy

Kahrıman

Zeren

2017

Archives of Foundry Engineering

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“…[1][2][3][4] The b-AlFeSi phase is an undesirable phase due to formation of hot cracking and surface defects during subsequent procedures, e.g., extrusion. [5,6] To obtain high surface-quality extruded products, at reasonable extrusion rates, the as-cast billets need to be homogenized before extrusion.…”

Section: Introductionmentioning

confidence: 99%

Influence of Heat Treatment on the Surface Structure of 6082 Al Alloys

Bayat

Carlberg

2017

Metall Mater Trans A

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The b-Al 5 FeSi intermetallic phase and coarse Mg 2 Si particles have negative effects on extrudability and workability of 6xxx Al alloys billets. To achieve extruded products with a high surface quality, the as-cast billets are heat-treated before extrusion. During heat treatment, the undesired intermetallic particles, i.e., b-AlFeSi platelets are transformed to rounded a-Al(FeMn)Si intermetallic phases. Although the heat treatment of the bulk areas of the 6xxx Al alloys has been the focus of many previous studies, the process of phase transformation at the very surface has not been paid the same attention. In this study, microstructures of a homogenized billet of a 6082 alloy at the area very close to the surface were investigated. By comparing the X-ray diffraction patterns (XRD) of heat-treated samples as a function of different holding times, the gradual phase transformations could be followed, and using GDOES and map analysis by EDX, the alloying elemental redistribution was analyzed. Partial remelting and porosity growth was detected, and transformation rates were faster than in bulk material and from what is known from industrial processes.

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“…In every step of the manufacturing process, the chemical composition and the process parameters have a very complex influence on the final mechanical properties [3][4][5][6][7][8][9][10]. One of these steps is the homogenisation process, which is a crucial heat treatment before the extrusion process for AA production [11,12]. After casting, the microstructure is not suitable for extrusion and has an inhomogeneous chemical composition, �-Al dendrites with various phases at the borders or in the interdendritic areas.…”

Section: Introductionmentioning

confidence: 99%

Influence of cooling mode in relation to casting and extrusion parameters on mechanical properties of AA6082

Malej

Terčelj

Peruš

et al. 2017

Materials and Geoenvironment

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In this study, conditional average estimator neural networks (CAE NNs) were used for an analysis of the common influences of the cooling mode in relation to the ram speed, extrusion ratio, casting speed and casting temperature on the yield strength and the elongation of an extruded profile made from aluminium alloy (AA)6082. The obtained results from the analysis revealed very complex relationships between these parameters. In order to maximise the values for the yield strength and the elongation, the values for the ram speed, extrusion ratio, casting speed and casting temperature should be optimised in relation to the mode of cooling.Key words: AA6082, intermetallic phases, hot extrusion, mechanical properties, neural networks Izvleček V tem delu smo uporabili CAE (ang. conditional average estimator, slo. cenilka pogojnega povprečja) nevronske mreže za analizo skupnega vpliva načina ohlajanja v povezavi s hitrostjo bata, iztiskalnim razmerjem, hitrostjo ulivanja in temperaturo ulivanja na mejo tečenja in raztezek iztiskanega profila iz aluminijeve zlitine 6082. Dobljeni rezultati iz analize so pokazali kompleksen vpliv parametrov na mejo tečenja in raztezek. Da lahko izboljšamo vrednosti meje tečenja in raztezka, moramo vrednosti za hitrost bata, iztiskalnega razmerja, hitrosti ulivanja in temperature ulivanja optimizirati v povezavi z načinom ohlajanja.Ključne besede: AA6082, intermetalne faze, vroče izstiskavanje, mehanske lastnosti, nevronske mreže

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Influence of heat treatment on the microstructure and mechanical properties of 6005 and 6082 aluminium alloys

Cited by 214 publications

References 12 publications

Microstructural and Mechanical Characterization of Al-0.80Mg-0.85Si-0.3Zr Alloy

Microstructural and Mechanical Characterization of Al-0.80Mg-0.85Si-0.3Zr Alloy

Influence of Heat Treatment on the Surface Structure of 6082 Al Alloys

Influence of cooling mode in relation to casting and extrusion parameters on mechanical properties of AA6082

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