Influence of Plastic Strain Accumulation in Continuous Ingots during ECAP on Structure and Recrystallization Temperature of AlCu4MgSi Alloy

et al. 2020

Archiv.Civ.Mech.Eng

Self Cite

This work demonstrates that the combined addition of Al10Sr and Al5TiB master alloys to the AlMg5Si2Mn effectively refines the grain microstructure and partially modifies the eutectic Mg2Si phase. Thorough spectroscopic characterization reveals that the grain refinement effect is due to Al3Ti particles acting as nucleation sites for α-Al grains, and the increased nucleation temperature of α-Al is due to Al10Sr addition. It is also determined that TiB2 particles can act as nucleation substrates for the primary Mg2Si phase. The prepared alloy sample with the finest microstructure (treated with both Al10Sr and Al5TiB) exhibits the greatest corrosion resistance among all tested samples.

Section: Tem Investigationsupporting

confidence: 85%

Effects of modifying the hypoeutectic AlMg5Si2Mn alloy via addition of Al10Sr and/or Al5TiB

Snopiński

Król

et al. 2020

Archiv.Civ.Mech.Eng

Self Cite

“…The aim of the presented research results is to determine the influence of the parameters of the horizontal continuous casting process on the mechanical properties and structure of the obtained AlCu4MgSi alloy ingots. This paper is presents extending investigations of previous research of the authors [9][10]. The determined mechanical properties and structure were correlated with the variable parameters (casting speed and flow rate of the cooling liquid in the primary cooling system) applied during the continuous casting process.…”

Section: Description Of Researchmentioning

confidence: 67%

Archives of Metallurgy and Materials

Nuckowski

2019

The article presents the results of research concerning AlCu4MgSi alloy ingots produced using horizontal continuous casting process under variable conditions of casting speed and cooling liquid flow through the crystallizer. The mechanical properties and structure of the obtained ingots were correlated with the process parameters. On the basis of the obtained results, it has been shown that depending on the cooling rate and the intensity of convection during solidification, significant differences in the mechanical properties and structure and of the ingots can occur. The research has shown that, as the casting speed and the flow rate of the cooling liquid increase, the hardness of the test samples decreases, while their elongation increases, which is related to the increase of the average grain size. Also, the morphology of the intermetallic phases precipitations lattice, as well as the centerline porosity and dendrite expansion, significantly affect the tensile strength and fracture mechanism of the tested ingots.

“…Tests were carried out on AlCu4MgSi (EN AW-2017A) alloy ingots (30 mm in diameter), which were produced using an aluminium alloys horizontal continuous casting test stand, located in the technological laboratory of the Department of Foundry Engineering at Silesian University of Technology. Detailed description of implemented horizontal continuous casting process and parameters is presented in previous works of the authors [11,12].…”

Section: Materials and Methodologymentioning

confidence: 99%

Archives of Foundry Engineering

Nuckowski

Kondracki

2019

The article presents the results of research concerning to AlCu4MgSi alloy ingots produced using horizontal continuous casting process. The presented research was focused on the precise determination of phase composition of the precipitates formed during the solidification of ingots and the analysis of their thermal stability. In order to assess the morphology of precipitates in the AlCu4MgSi alloy, data obtained by using a computer simulation of thermodynamic phenomena were compiled with results obtained using advanced research techniques, i.e. High-temperature X-ray diffraction (HT-XRD), SEM-EDS, Thermal and derivative analysis (TDA) and Glow discharge optical emission spectroscopy (GD OES). SEM observations and analysis of chemical composition in micro-areas showed that the precipitates are mainly intermetallic θ-Al 2 Cu and β-Mg 2 Si phases, and also presence of Al 19 Fe 4 MnSi 2 intermetallic phase was confirmed by X-ray diffraction studies. Based on the prepared Thermo-Calc simulation data, high-temperature X-ray diffraction measurements were conducted.