Sc in Aluminum Alloys

Berezina, A.L.; Chuistov, K. V.; Kolobnev, N. I.; Khokhlatova, L. B.; Monastyrskaya, Tatjana

doi:10.4028/www.scientific.net/msf.396-402.741

Cited by 8 publications

(11 citation statements)

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“…11. For temperatures of 370 • C and above the present solvus estimates increase with increasing temperature, and the data points are within the spread of previously reported values [19,26,33,34,[44][45][46][47][48][49]. It thus seems that the current estimates are good in this temperature regime.…”

Section: Extrapolation Of Coarsening Data For Determination Of the Sosupporting

confidence: 82%

“…The shift in γ values between 350 and 370 • C could be related to coherency loss at the particle/matrix interface at the higher temperature regime. Such loss of coherency is reported to occur when the Al 3 Sc particles grow beyond a critical size [16,23,27,28,54], and an increase in the γ value due to the introduction of interfacial dislocations in continuously precipitated, spherical Al 3 Sc particles has been reported [54]. It is also possible that the interfaces of discontinuously precipitated Al 3 Sc particles have some properties that modify the γ value.…”

Section: Estimates Of the Particle/matrix Interface Energy From Coarsmentioning

confidence: 94%

“…Values of n reported in other investigations [19,27,32] are given in Table 3. In all these investigations, however, the specimens were brought to the transformation temperature from room temperature, not from a solutionizing temperature as was the case in the present investigation.…”

Section: Kinetics Of the Precipitation Reactionmentioning

confidence: 97%

“…In order to minimise the Sc-addition that is needed to give the desired effects in an alloy, it is necessary to be able to predict the modus and kinetics of the formation of Al 3 Sc particles from a supersaturated solid solution. Several investigations of the precipitation kinetics and precipitation mechanisms of Al 3 Sc have been published in the technical literature over the past 10-20 years [16][17][18][19][20][22][23][24][25][26][27][28][29][30][31][32][33]. The published material does, however, give only a limited overview of the regimes in which either of the two precipitation mechanisms occur, and the differences in precipitation kinetics between the two mechanisms are not accounted for.…”

Section: Introductionmentioning

confidence: 98%

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Kinetics and mechanisms of precipitation in an Al–0.2wt.% Sc alloy

Røyset

Ryum

2005

Materials Science and Engineering: A

139

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Section: Extrapolation Of Coarsening Data For Determination Of the Sosupporting

confidence: 82%

Section: Estimates Of the Particle/matrix Interface Energy From Coarsmentioning

confidence: 94%

Section: Kinetics Of the Precipitation Reactionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 98%

See 2 more Smart Citations

Kinetics and mechanisms of precipitation in an Al–0.2wt.% Sc alloy

Røyset

Ryum

2005

Materials Science and Engineering: A

139

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“…The mechanism and kinetics of Al 3 Li/Al 3 Sc two-phase composite nanoparticles formation in the process of aging of ternary Al(23)%Li(0.10.6)%Sc alloys were studied [2,3]. The particles of this type consist of two isomorphic phases with L1 2 type order.…”

mentioning

confidence: 99%

Composite Particles Formation and Behaviour in Al-Li Alloys Alloyed by Sc (Zr) under Heat Treatment and Severe Plastic Deformation

2015

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The mechanism and kinetics of Al3Li/Al3Sc composite particles formation during aging of triple AlLiSc alloys were studied. The particles of such type consist of two isomorphic phases, ordered by L12 type. Composite particles in AlLiSc are formed by epitaxial nucleation of δ (Al3Li) phase on pre-existing Al3Sc precipitates at low temperature aging in the area of existence of Al3Li phase, and form uniform shell around them. The motive force of such heterostructure formation is the minimization of total surface, elastic and chemical energy of the alloy. Dark-eld transmission electron microscopy images of such composite particles taken from superlattice reex 100 are composed of a dark core surrounded by a bright shell. The mutual diusion of Li and Sc during the aging of AlLiSc alloys is observed. The dark-eld transmission electron microscopy image of the composite particle obtained from superlattice reection became transparent after continuous natural aging of AlLiSc alloys. The presence of the particle in Al matrix can be only seen due to decoration by secondary precipitations of δ (Al3Li) phase. Composition analysis of such transparent particles was carried out using two-beam kinematical theory of electron diraction. Such composite particles with transparent cores remain in Al matrix even after severe plastic deformation of AlLiSc alloy.

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Effect of homogenization treatment on microstructure and properties of Al-Mg-Mn-Sc-Zr alloy

Nie

Yin

Zhu

et al. 2007

J Cent. South Univ. Technol.

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Abstract：The effect of homogenization on the hardness, tensile properties, electrical conductivity and microstructure of as-cast Al-6Mg-0.4Mn-0.25Sc-0.12Zr alloy was studied. The results show that during homogenization as-cast studied alloy has obviously hardening effect that is similar to aging hardening behavior in traditional Al alloys. The precipitates are mainly Al 3 (Sc,Zr) and Al 6 Mn. When homogenization temperature increases the hardness peak value is declined and the time corresponding to hardness peak value is shortened. The electrical conductivity of the alloy monotonously increases with increasing homogenization temperature and time. The decomposition of the supersaturated solid solution containing Sc and Zr which is formed during direct chilling casting and the precipitation of Al 3 (Sc, Zr) cause hardness increasing. The depletion of the matrix solid solubility decreases the ability of electron scattering in the alloy, resulting in the electrical conductivity increased. Tensile property result at hot rolling state shows that the optimal homogenization treatment processing is holding at 300−350 for ℃ 6−8 h.

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Sc in Aluminum Alloys

Cited by 8 publications

References 0 publications

Kinetics and mechanisms of precipitation in an Al–0.2wt.% Sc alloy

Kinetics and mechanisms of precipitation in an Al–0.2wt.% Sc alloy

Composite Particles Formation and Behaviour in Al-Li Alloys Alloyed by Sc (Zr) under Heat Treatment and Severe Plastic Deformation

Effect of homogenization treatment on microstructure and properties of Al-Mg-Mn-Sc-Zr alloy

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