Effect of Zr, Cr and Sc on the Al–Mg–Si–Mn high-pressure die casting alloys

Prach, Olena; Trudonoshyn, Oleksandr; Randelzhofer, P.; Körner, С.; Durst, Karsten

doi:10.1016/j.msea.2019.05.038

Cited by 66 publications

(11 citation statements)

References 23 publications

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“…These phases formed in the interdendritic region are difficult to be dissolved at 200 °C, which has positive effects on the hardness, and thermal stability of the alloy . [14,18,29] What's more, Lu et al [30] and Yang et al [31] had shown that Sc segregation at the Al/θ 0 -Al 2 Cu interface lowed its interfacial energy and enhanced the coarsening resistance of θ 0 precipitates resulting in a stable alloy hardness at elevated temperature. As a result, Al-12Si-Sc alloy exhibits better microstructure stability than A380 alloy.…”

Section: Hardness Response During Thermal Exposurementioning

confidence: 99%

Correlation Among Microstructure, Mechanical Properties, and Thermal Stability of a Novel HPDC Al–12Si Alloy with Minor Sc

et al. 2022

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The microstructure, mechanical properties, and thermal stability of high‐pressure die casting (HPDC) Al–12Si–Sc alloy with 0.1 wt% Sc addition are investigated. Compared with the commercial A380 alloy, the alloy shows a significant refinement of α‐Al and eutectic Si microstructure. Meanwhile, β‐Fe with irregular morphology shows a smaller size and lower volume fraction in Al–12Si–Sc alloy. Upon as‐cast state, the elongation of the alloy is improved to 6.7% with an ultimate tensile strength of 332 MPa, which is a better combination of ductility and strength in the literature. After thermal exposure at 200 °C for 200 h, it retains tensile strength of 277 MPa and holds the microhardness up to 90 HV even exposure for 1000 h. These excellent properties may widen the application of HPDC Al–Si alloy for the cylinder block and cylinder head.

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Section: Hardness Response During Thermal Exposurementioning

confidence: 99%

Correlation Among Microstructure, Mechanical Properties, and Thermal Stability of a Novel HPDC Al–12Si Alloy with Minor Sc

et al. 2022

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“…e black arrow points to parallel markings on the surface of the particle. e associated EDS spectrum corresponding to the area marked X in (a) reveals that this phase is possibly (Al,Si) 3 (Ti,Zr), depending on the Si/Zr intensity ratio [42].…”

Section: Tensile Properties Table 3 Lists the Tensile Parameters Of Alloymentioning

confidence: 99%

“…e Al 3 Zr phase is a closed packed structure (Figure 17(a)) with an interatomic spacing of 0.441 nm. However, there is controversy regarding the particle structure which has been reported as being cubic Ll 2 or tetragonal DO23, as shown in Figure 17(b) [42,43]. It is also reported that Al 3 Zr has the stable DO23 structure, but for small supersaturations of the solid solution, Al 3 Zr precipitates with the metastable L1 2 structure and precipitates with the DO23 structure only appear for prolonged heat treatment and high enough supersaturations [44,45].…”

Section: Tensile Properties Table 3 Lists the Tensile Parameters Of Alloymentioning

confidence: 99%

Effect of Dispersoids and Intermetallics on Hardening the Al‐Si‐Cu‐Mg Cast Alloys

Hernández-Sandoval

Abdelaziz

Samuel

et al. 2021

Advances in Materials Science and Engineering

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The principal aim of the present research work was to compare the role of dispersoids Al2O3 (∼15 μm average particle size) and SiC (∼15 μm average particle size) with that offered by Zr- and Ni-based intermetallics (∼35–70 μm average particle size) on the hardening of cast aluminum 354 alloy (9.1% Si, 0.12% Fe, 1.8% Cu, 0.008% Mn, 0.6% Mg, and 87.6% Al) at ambient temperature. There is no observable poisoning effect on the refinement of grain size after the addition of Zr to the alloys investigated in this study. The tensile test results were examined in light of the microstructural features of the corresponding alloy samples. The contribution of the added dispersoids or Ni and Zr alloying elements on the tensile properties of the 354 alloys was determined employing ∆P plots (where P = Property, UTS, YS, or %El), using the base alloy (in the as-cast condition) as a reference point. The tensile results were supported by investigating the precipitation-hardening phases using scanning and transmission electron microscopy as well as examining the fracture surfaces of selected conditions applying field emission scanning electron microscopy. The results show that, in all cases, Al2Cu phase is the main hardening agent. The contribution of about 1.5 vol% of SiC or Al2O3 to the strength of the base alloy is higher than that offered by Zr- and Ni-based intermetallics, under the same aging treatment.

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“…So far, the research on die-casting Al-Si-Cu-Mg alloys is mostly focused on the microstructure and static mechanical behavior, but the research about the fatigue behavior of die-cast Al-Si-Cu-Mg alloy is relatively scarcer. In addition, some research has revealed that the addition of the Sc element can effectively improve the mechanical properties of Al-Si-Cu-Mg alloys [17]. Therefore, low-cycle fatigue experiments were carried out for both the metal-mold cast and die-cast Al-9Si-4Cu-0.4Mg-0.3Sc alloys (wt %) in this investigation.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Low-Cycle Fatigue Behavior of Al-9Si-4Cu-0.4Mg-0.3Sc Alloy with Different Casting States

et al. 2020

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The low-cycle fatigue behavior of Al-9Si-4Cu-0.4Mg-0.3Sc alloy with different casting states was investigated by performing low-cycle fatigue tests and by means of observations and analysis with a scanning electron microscope (SEM) and a transmission electron microscope (TEM). It was found that the metal-mold cast and die-cast Al-9Si-4Cu-0.4Mg-0.3Sc alloys exhibited the cyclic stress response of strain hardening under all imposed total strain amplitudes. The cyclic deformation resistance and fatigue life of the metal-mold cast Al-9Si-4Cu-0.4Mg-0.3Sc alloy were lower than those of the die-cast Al-9Si-4Cu-0.4Mg-0.3Sc alloy. The plastic strain and elastic strain amplitudes of the metal-mold cast and die-cast Al-9Si-4Cu-0.4Mg-0.3Sc alloys were linearly related to the number of reversals to failure, which obeyed the Coffin-Manson and Basquin formulas, respectively. The results of TEM observation revealed that at all imposed total strain amplitudes, the cyclic deformation mechanisms of the metal-mold cast and die-cast Al-9Si-4Cu-0.4Mg-0.3Sc alloys were planar slip and wavy slip at the lower and higher strain amplitudes, respectively.

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Effect of Zr, Cr and Sc on the Al–Mg–Si–Mn high-pressure die casting alloys

Cited by 66 publications

References 23 publications

Correlation Among Microstructure, Mechanical Properties, and Thermal Stability of a Novel HPDC Al–12Si Alloy with Minor Sc

Correlation Among Microstructure, Mechanical Properties, and Thermal Stability of a Novel HPDC Al–12Si Alloy with Minor Sc

Effect of Dispersoids and Intermetallics on Hardening the Al‐Si‐Cu‐Mg Cast Alloys

Microstructure and Low-Cycle Fatigue Behavior of Al-9Si-4Cu-0.4Mg-0.3Sc Alloy with Different Casting States

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