'Sc Effect' of Improving Mechanical Properties in Aluminium Alloys

Milman, Yu.V.; Lotsko, D. V.; Sirko, O.I.

doi:10.4028/www.scientific.net/msf.331-337.1107

Cited by 41 publications

(35 citation statements)

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“…These during the homogenization treatment and such precipitates in turn inhibit grain growth and recrystallization during subsequent thermal and mechanical processing of these alloys. In this regard, the beneficial role of Sc as a recrystallization inhibiting element has also proven significant [7]. Most commercial Al alloys also contain about 0.05 to 0.1 wt% Ti (commonly added in the form of Tibor/ Ticar) to refine the ingot grain size.…”

Section: Role Of Minor Alloying Elementsmentioning

confidence: 97%

“…Most commercial Al alloys also contain about 0.05 to 0.1 wt% Ti (commonly added in the form of Tibor/ Ticar) to refine the ingot grain size. The role of Sc (when present together with Zr) as a grain refiner has proven rather significant, [7,8] although Sc addition has been limited to non-commercial/special alloys, and this is partly because Sc is scarce and expensive. Commercial Al alloys, especially those rich in Mg, may further contain small additions of Be.…”

Section: Role Of Minor Alloying Elementsmentioning

confidence: 99%

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Microstructure and properties of high strength aluminium alloys for structural applications

Mukhopadhyay

2009

Trans Indian Inst Met

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This article discusses the fundamental basis of high strength Al alloy design and describes the role of alloying elements, mechanical processing parameters and heat treatments toward the evolution of microstructure that controls the desired properties i.e. strength, fracture toughness, stress corrosion cracking (SCC) resistance, fatigue crack initiation and propagation resistance, and weldability in 7xxx series Al alloys. The beneficial effects of suitable micro/trace alloying elements, and deleterious effects of certain impurity elements on a variety of properties are further discussed within the present context.

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Section: Role Of Minor Alloying Elementsmentioning

confidence: 97%

Section: Role Of Minor Alloying Elementsmentioning

confidence: 99%

Microstructure and properties of high strength aluminium alloys for structural applications

Mukhopadhyay

2009

Trans Indian Inst Met

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“…The minor additions of Mn, Cr, Zr, Sc, and Ag as modifiers are wildly used in metallurgy to improve the mechanical properties and microstructures of such aluminum alloys [1][2][3]. As the most effective modifier, Sc can improve nearly all kinds of mechanical properties of Al-Zn-Mg-Cu alloys [4][5][6][7]. In Al-Sc alloys, the main strengthening phase is Al 3 Sc, which has an L1 2 structure and is fully coherent to the matrix.…”

Section: Introductionmentioning

confidence: 99%

Effects of minor Sc on the microstructure and mechanical properties of Al-Zn-Mg-Cu-Zr based alloys

Pan

Zhang

et al. 2009

Rare Metals

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Five kinds of Al-Zn-Mg-Cu-Zr based alloys with different Sc additions were prepared by ingot metallurgy. The effects of minor Sc on the microstructure and mechanical properties of Al-Zn-Mg-Cu-Zr based alloys were investigated using tensile tests, optical microscopy (OM), and transmission electron microscopy (TEM). The results show that the ultimate tensile strength and yield strength are improved by 94 and 110 MPa, respectively, and the elongation to failure remains at a reasonable extent (11.1%) in the Al-Zn-Mg-Cu-Zr based alloy with 0.21 wt.% Sc addition after solution heat treatment at 475°C for 40 min and then aged at 120°C for 24 h. The addition of minor Sc induces the formation of Al 3 (Sc,Zr) particles, which are highly effective in refining the cast microstructures, retarding recrystallization, and pinning dislocations. The increment of strength is attributed mainly to fine grain strengthening, precipitation strengthening of Al 3 (Sc,Zr) particles, and substructure strengthening.

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“…It is shown that zirconium dissolves in Al 3 Sc to form an Al 3 (Sc 1-x Zr x ) phase with variable composition, whose coagulation kinetics largely differs from that of Al 3 Sc. The particles of the complex intermetallide are much smaller and more slowly coagulate with increasing temperature and holding time during ageing [9][10][11]; hence, substantial hardening remains even after one-hour holding at 500°C [10]. Therefore, joint Sc and Zr doping is more efficient for increasing the recrystallization temperature [12].…”

Section: Introductionmentioning

confidence: 99%

Structure and properties of Al–Mg alloys depending on scandium and zirconium additions and production methods

Milman

Neikov

Sirko

et al. 2010

Powder Metall Met Ceram

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The paper examines how scandium and zirconium doping of Al-Mg alloys produced by conventional casting and powder metallurgy methods influences their structure and mechanical properties. It is shown that Al-Mg powder alloys are not recrystallized in the plastic deformation process and subsequent heating to 550°C. In cast alloys, recrystallization begins even in the extrusion process. Additions of scandium, zirconium, and chromium restrain the recrystallization of alloys when heated to 550°C. Doping of Al-Mg alloys with scandium and zirconium increases their strength by 80−120%. Doped powder alloys have much greater strength than cast alloys and quite high plasticity.

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'Sc Effect' of Improving Mechanical Properties in Aluminium Alloys

Cited by 41 publications

References 0 publications

Microstructure and properties of high strength aluminium alloys for structural applications

Microstructure and properties of high strength aluminium alloys for structural applications

Effects of minor Sc on the microstructure and mechanical properties of Al-Zn-Mg-Cu-Zr based alloys

Structure and properties of Al–Mg alloys depending on scandium and zirconium additions and production methods

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