Scientific principles of making an alloying addition of scandium to aluminium alloys

Davydov, V. G.; Rostova, T. D.; Захаров, В. В.; Filatov, Yu. A.; Yelagin, V.I.

doi:10.1016/s0921-5093(99)00652-8

Cited by 318 publications

(117 citation statements)

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“…It is well-known minor Sc and Zr addition in Al alloy can radically improves the mechanical property and weld ability by forming fine Al 3 Sc and Al 3 (Sc,Zr) phase during suitable heat treatment [8,9]. Similarly, our earlier studies show minor Sc addition can also significantly improve the mechanical property of the cellular Al foams after the T6-treatment [10].…”

Section: Introductionsupporting

confidence: 53%

Mechanical Properties and Corrosion Behavior of Cellular Al-Sc-Zr Foams

Huang¹,

Luo²,

Fan³

et al. 2015

Proceedings of the 2015 International Conference on Structural, Mechanical and Material Engineering

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Abstract-By using Ca particles as thickening agent and titanium hydride as blowing agent Cellular Al-0.16Sc-0.08Zr foams with a porosity of 72.5±0.5% were successfully fabricated by the melt-foaming method Isochronal aging treatments are beneficial to improve the mechanical properties and corrosion resistance significantly. Observation on the cell wall microstructure at 400℃ confirms the precipitation of nano-size Al 3 (Sc,Zr) particles that are coherent with Al matrix with an average radius of 4.1 nm. This suggests that these Al 3 (Sc,Zr) particles can inhibit the grain boundary sliding and dislocation movement, thus, strengthening the cell walls and increasing the compressive strength of the foams. In addition, the Sc 2 O 3 protective film over the detective surface improves the corrosion resistance of the aged Al-0.16Sc-0.08Zr foam.

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Section: Introductionsupporting

confidence: 53%

Mechanical Properties and Corrosion Behavior of Cellular Al-Sc-Zr Foams

Huang¹,

Luo²,

Fan³

et al. 2015

Proceedings of the 2015 International Conference on Structural, Mechanical and Material Engineering

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“…Aluminum and Al3Sc have the same lattice structure and the misfit between lattice parameters is about 1.3%. The grain refinement mechanism of primary aluminum with scandium is due to heterogeneous nucleation, and the addition of scandium has been shown to have a beneficial effect on the strength of a cast Al-Mg alloy [46,47]. Figure 2 demonstrates the effect of Sc rates on the ultimate tensile strength of unrefined Al-Zn-Mg-Cu alloys and refined the alloys by Al-5Ti-1B and Al-5Zr using the proposed formulation above (Equation 6).…”

Section: Resultsmentioning

confidence: 99%

A Mathematical Formulation to Estimate the Effect of Grain Refiners on the Ultimate Tensile Strength of Al-Zn-Mg-Cu Alloys

Kurt

Oduncuoğlu

Kurt

2015

Metals

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Abstract:In this study, the feed-forward (FF) neural networks (NNs) with back-propagation (BP) learning algorithm is used to estimate the ultimate tensile strength of unrefined Al-Zn-Mg-Cu alloys and refined the alloys by Al-5Ti-1B and Al-5Zr master alloys. The obtained mathematical formula is presented in great detail. The designed NN model shows good agreement with test results and can be used to predict the ultimate tensile strength of the alloys. Additionally, the effects of scandium (Sc) and carbon (C) rates are investigated by using the proposed equation. It was observed that the tensile properties of Al-Zn-Mg-Cu alloys improved with the addition of 0.5 Sc and 0.01 C wt.%.

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“…Essentially, this difference is caused by the material flow. Second, it is most likely related to the material itself: AlMgSc alloys are famous for the anti-recrystallization effect due to the pinning effect of Al 3 Sc dispersoids, [27][28][29] which is most likely why such a structural characteristic is uncommon for other Al alloy refill friction stir spot welds.…”

Section: A Subdivision Of the Weldmentioning

confidence: 99%

Texture Development and Material Flow Behavior During Refill Friction Stir Spot Welding of AlMgSc

Shen¹,

Lage

Suhuddin³

et al. 2017

Metall Mater Trans A

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The microstructural evolution during refill friction stir spot welding of an AlMgSc alloy was studied. The primary texture that developed in all regions, with the exception of the weld center, was determined to be h110i fibers and interpreted as a simple shear texture with the h110i direction aligned with the shear direction. The material flow is mainly driven by two components: the simple shear acting on the horizontal plane causing an inward-directed spiral flow and the extrusion acting on the vertical plane causing an upward-directed or downward-directed flow. Under such a complex material flow, the weld center, which is subjected to minimal local strain, is the least recrystallized. In addition to the geometric effects of strain and grain subdivision, thermally activated high-angle grain boundary migration, particularly continuous dynamic recrystallization, drives the formation of refined grains in the stirred zone.

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Scientific principles of making an alloying addition of scandium to aluminium alloys

Cited by 318 publications

References 0 publications

Mechanical Properties and Corrosion Behavior of Cellular Al-Sc-Zr Foams

Mechanical Properties and Corrosion Behavior of Cellular Al-Sc-Zr Foams

A Mathematical Formulation to Estimate the Effect of Grain Refiners on the Ultimate Tensile Strength of Al-Zn-Mg-Cu Alloys

Texture Development and Material Flow Behavior During Refill Friction Stir Spot Welding of AlMgSc

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