3D analysis of macrosegregation in twin-roll cast AA3003 alloy

Šlapáková, Michaela; Zimina, Mariia; Zaunschirm, Stefan; Kastner, Johann; Bajer, Jan; Cieslar, Miroslav

doi:10.1016/j.matchar.2016.04.023

Cited by 37 publications

(5 citation statements)

References 24 publications

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“…Concerning the microstructure of the cast aluminum layer, colonies of the primary phases were arranged rather in chains orientated in the casting direction on both outer parts of the aluminum layer whereas in the central part the smaller round particles were randomly distributed. Occasionally, central segregations were present near the center of the strip (Figure 1) [21]. A slight difference of the phase distribution on the opposite edges of the aluminum layer (with and without the adjacent steel substrate) was noticed.…”

Section: Resultsmentioning

confidence: 95%

Aluminum-steel clad material prepared by twin-roll casting

Křivská

Šlapáková

Grydin

et al. 2020

METAL 2020 Conference Proeedings

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Both steel and aluminum alloys rank among the most important structural materials due to their suitable properties in various applications and low material cost. Bonding of such dissimilar materials and formation of a composite material can lead to an effective combination of steel high strength and aluminum low density and corrosion resistance. Fabrication of aluminum-steel clad material by twin-roll casting leads to preparation of composite material whose properties are governed by the microstructure of intermetallic layer between aluminum and steel. Such layer formed after annealing at 500 °C for 16 hours by diffusion of iron atoms into aluminum.

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Section: Resultsmentioning

confidence: 95%

Aluminum-steel clad material prepared by twin-roll casting

Křivská

Šlapáková

Grydin

et al. 2020

METAL 2020 Conference Proeedings

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“…TRC is a sub-rapid solidification technology. Temperature, melt flow and pressure affect the solidification process simultaneously resulting in special element distribution in the TRC slab [2,3]. The uneven distribution of elements also limits the the types of products produced by TRC.…”

Section: Introductionmentioning

confidence: 99%

Improving element uniformity and mechanical properties of Al–Mg–Si alloy fabricated by twin roll casting with superheat melt treatment

Wei

Jiang

et al. 2022

Mater. Res. Express

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The effect of superheat melt treatment(SMT) on microstructure and properties of Al-Mg-Si alloy fabricated by twin roll casting(TRC) was analyzed using optical microscope, scanning electron microscopy, emission electron probe micro analyzer and transmission electron microscopy. SMT increased the subcooling degree of melt during TRC. The solidification microstructure with high dendrite density and small dendrite spacing was obtained. The second phase was evenly distributed between dendrites and the solute concentration gradient was decreased. Intergranular solute aggregation caused by Reynolds’ dilatancy in TRC slab was effectively suppressed. The homogeneous solute distribution of TRC slab with SMT can be realized by short-time homogenization heat treatment. The size of insoluble particles was greatly reduced. The complete decomposition of non-equilibrium eutectic phase increased the solute concentration in α-Al, which promoted the precipitation of precipitates during aging heat treatment. The tensile strength and yield strength of T6 slab were improved, while the uniform elongation are almost not decreased. The strength and uniform of slab in T4P state were both improved. The obtained results can help further shorten the production cycle of TRC slabs and improve mechanical properties.

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“…In this process, the metal melt is directly injected to the gap between two rotating water-cooled metal rolls, and the solidification and rolling processes are completed simultaneously to obtain a strip with fine grains and no porosity directly during the TRC process [3]. However, obvious macrosegregation was observed in the alloys produced by TRC [4,5]. The homogenization of alloys to improve their properties is the traditional material-optimization approach.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Si Content to Inhibit Inhomogeneous Deformation in Al-Mg-Si Alloy Fabricated via Twin-Roll Casting

Wei

Jiang

et al. 2022

Metals

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Herein, the effects of Si content on the microstructure evolution of Al-Mg-Si alloys during twin-roll casting (TRC) and subsequent heat treatment were characterized using scanning electron microscopy, emission electron probe micro analysis, electron backscatter diffraction, and transmission electron microscopy. The effects of insoluble Si particles, solute gradient, and recrystallization on the mechanical properties of the alloy in the T4P state were analyzed. An inhomogeneous deformation in the thickness direction of the TRC strip was observed during the pre-strain test. A premature local deformation at the element barren region (EBR) in the middle of the strip was considered to be the origin of the limited mechanical properties. By increasing the Si from 0.7 wt% to 1.1 wt%, the content and uniformity of the solute in the EBR can be effectively improved. The stronger work-hardening ability weakens the inhomogeneous deformation. Si addition significantly increased the number of insoluble Si particles during the heat treatment. The structure with a hard shell and soft core in the TRC strip significantly reduced the negative effect of insoluble Si particles on the mechanical properties. The tensile strength and uniform elongation of the strip increased from 159.44 MPa and 18.36% to 209.96 MPa and 29.791%, respectively.

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3D analysis of macrosegregation in twin-roll cast AA3003 alloy

Cited by 37 publications

References 24 publications

Aluminum-steel clad material prepared by twin-roll casting

Aluminum-steel clad material prepared by twin-roll casting

Improving element uniformity and mechanical properties of Al–Mg–Si alloy fabricated by twin roll casting with superheat melt treatment

Optimization of Si Content to Inhibit Inhomogeneous Deformation in Al-Mg-Si Alloy Fabricated via Twin-Roll Casting

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