Heat treatment and age hardening of Al–Si–Mg–Mn commercial alloy with addition of Sc and Zr

Vlach, Martin; Čı́žek, Jakub; Smola, Bohumil; Melikhova, Oksana; Vlček, Marián; Kodetová, Veronika; Kudrnová, Hana; Hruška, Petr

doi:10.1016/j.matchar.2017.04.017

Cited by 63 publications

(40 citation statements)

References 46 publications

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“…In contrast, silicon is commonly identified in interdendritic regions as shown in Figure 3. The structure of crystalline solid, from the phase diagram of AlMgSi ternary alloy [21], shows the content of magnesium and silicon as solid solute alloying in the aluminum-rich corner. It seems, therefore, that solutes comprise a solid solution in aluminum solvent matrix at a specific extent.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, the alloying elements, such as silicon, exhibited unique structural arrangement that elevated the mechanical behavior reached by precipitation development occurred after thermal treatment [18]. The precipitation in these alloys indicates a several transformation sequences from the supersaturated solid solution that relies on the fine precipitation, which strained the crystallographic planes of the Al-matrix and improving the specific Young's modulus, high specific strength, yield and creep strengths [19][20][21][22]. The silicon and iron microalloying can refine microstructure of AlMg alloys due to the formation of Mg 2 Si and Al 2 MgC 2 phases during the solidification process [23,24].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, various averaging procedures suggest that AlMgSi alloys reach up to 90% extruded volume owing to an attractive combination of mechanical and chemical properties and an excellent response to surface finishing operations [27][28][29]. A gradual increase of extruded pieces continued growth by the 6000 series like in automotive, marine and architectural applications [13,21].…”

Section: Introductionmentioning

confidence: 99%

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Solidification Physics and Microstructure: A Study of AlMg and AlMgSi Alloys by Vortex Method

Rodríguez¹,

Martı́nez²,

Canul³

2018

Solidification

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Physical properties on solidification process deal with the internal atomic arrangement, named generally microstructure. The microstructure characteristic is essential for the properties of metallic materials, including binary, ternary or eutectic alloys. Thus, despite significant progress on microstructural evolution, numerous challenges still exist for revealing the internal structure to act synergistically with matrix alloy chemical components. It is well known that the internal microstructure of an alloy controls and modifies the nature, interaction type and properties of the existing defects and final applications.At this point, necessary understanding of the correlation between equilibrium and nonequilibrium effects, surface energy and chemical potential for the time of the structures formation is probably the key to solidification that can help to predict the complex of microstructures. For the case of multi-phase solidification, AlMgSi alloy involves thousands of atoms, at the atomic scale, that transit to microstructures while the solid-liquid phase transformation occurs. This chapter outlines the role of solidification physics, and the atomic arrangement is believed to have in influencing mechanical hardness properties and degradation resistance.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Solidification Physics and Microstructure: A Study of AlMg and AlMgSi Alloys by Vortex Method

Rodríguez¹,

Martı́nez²,

Canul³

2018

Solidification

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“…Transmission electron microscopy (TEM) imaging revealed coarse incoherent Sc and Zr dispersoids and β' precipitates in the modified alloy while the base alloy contained mostly fine β'' precipitates. A difference in the ageing behaviour and kinetics of the Mg/Si precipitates in the presence of Sc/Zr was attributed to this strength loss, though this phenomena has been disputed by other authors [26].…”

Section: Introductionmentioning

confidence: 90%

Developing an Optimized Homogenization Process for Sc and Zr Containing Al-Mg-Si Alloys

Babaniaris

Mariappan

Jiang

et al. 2019

The Minerals, Metals &Amp; Materials Series

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Light-weighting of vehicles drives the development of Aluminium alloys with improved strength and formability. An opportunity to achieve this goal is using Scandium (Sc). The beneficial effects from Sc comes from the formation of nanosized Al3Sc dispersoids. Detrimental interactions between Sc and Silicon (Si) has limited the uptake of Sc in 6xxx alloys. The first step towards developing Sc containing 6xxx-series is to understand the as-cast microstructure and the effect of subsequent heat treatment on the dispersoids. This work uses isochronal ageing trials on a series of Al-Mg-Si-(Sc)-(Zr) model alloys. The evolution of hardness and conductivity is recorded to indirectly characterize the precipitate sequence. Transmission electron microscopy is used to further characterize the morphology and kinetics of MgSi precipitates and Sc/Zr dispersoids. The precipitation of Sc was altered by the presence of Si, and hence it is concluded that a non-traditional homogenization treatment is required for these alloys.

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“…Several methods how to further improve their properties are under research in recent years. Their strength may be increased either by addition of suitable alloying elements such as scandium and zirconium [3] or by decreasing the grain size by severe plastic deformation [4]. The formation of β-phase Al 3 Mg 2 particles, which promote the exfoliation corrosion [5] may be suppressed by the use of casting procedures alternative to direct-chill (DC) casting and rolling, which produce layered and pancake grain structure [6].…”

Section: Introductionmentioning

confidence: 99%

The Evolution of Microstructure during Annealing of Al-Mg-Sc-Zr Alloy Deformed by Equal Channel Angular Pressing

et al. 2018

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The Al-Mg-Sc-Zr alloys exhibit reasonable mechanical properties (e.g. corrosion resistance, weldability, superplasticity) for application in many branches of the industry. They owe their strength mainly to coherent particles of Al3Sc or Al3(Sc,Zr) phase which form during heat treatment at 300 • C. The influence of such particles on mechanical behaviour and microstructure evolution was studied on a twin-roll cast alloy which was subjected to deformation by equal channel angular pressing. Three types of processing of the material were compared: (1) only deformation, (2) deformation and heat treatment and (3) heat treatment and deformation. The deformation by equal channel angular pressing caused fragmentation of the original grains into micrometric grains and subgrains regardless of the presence of Al3(Sc,Zr) particles. The subsequent isochronal annealing with heating rate 50 K/50 min led to both softening and hardening of the material, dislocation recovery and recrystallization of the grain structure, the later was similar in all the studied materials

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Heat treatment and age hardening of Al–Si–Mg–Mn commercial alloy with addition of Sc and Zr

Cited by 63 publications

References 46 publications

Solidification Physics and Microstructure: A Study of AlMg and AlMgSi Alloys by Vortex Method

Solidification Physics and Microstructure: A Study of AlMg and AlMgSi Alloys by Vortex Method

Developing an Optimized Homogenization Process for Sc and Zr Containing Al-Mg-Si Alloys

The Evolution of Microstructure during Annealing of Al-Mg-Sc-Zr Alloy Deformed by Equal Channel Angular Pressing

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