Phase transformations in isochronally annealed mould-cast and cold-rolled Al–Sc–Zr-based alloy

Vlach, Martin; Stulı́ková, Ivana; Smola, Bohumil; Žaludová, N.; Černá, Jaroslava

doi:10.1016/j.jallcom.2009.11.126

Cited by 66 publications

(31 citation statements)

References 26 publications

(59 reference statements)

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“…Negative numerical derivatives of the measured resistivity annealing curves. data compiled in the previous studies of the mould-cast and cold-rolled AlScZr alloys [9] as well as the mould--cast AlMnScZr-based alloys [15] do not dier in the temperature position of this stage from spectra in Fig. 3.…”

Section: Resultsmentioning

confidence: 65%

“…3. This stage was ascribed to the precipitation of the Al 3 Sc particles [9,15]. Thus the observed undistinguished resistivity decrease and corresponding I-stage in the annealing spectra in Fig.…”

Section: Resultsmentioning

confidence: 71%

“…• C are smaller compared to the mould-cast and cold-rolled AlScZr alloys [9] and the mould-cast AlMnScZr-based alloys [9,16]. Similar slight HV increase during isochronal annealing between 240300…”

Section: Resultsmentioning

confidence: 79%

“…Positive eects on microhardness, recrystallization temperature, corrosion resistance and weldability attained due to the coherent spherical nanosized Al 3 (Sc,Zr) particles with the cubic L1 2 structure are very pronounced [15,8]. The decomposition sequence of the supersaturated solid solution of the AlScZr-based system is known in the following form [5,9,10]: Sc-rich clusters → Al 3 Sc phase → layer rich in Zr → Al 3 (Sc,Zr) phase.…”

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confidence: 99%

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Microstructure, Thermal and Mechanical Properties of Non-Isothermally Annealed Al-Sc-Zr and Al-Mn-Sc-Zr Alloys Prepared by Powder Metallurgy

et al. 2012

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This paper reports results of a study aimed at understanding the precipitation processes occurring during the annealing of two AlScZr-based alloys with and without Mn prepared by powder metallurgy with subsequent hot extrusion at 350• C. Samples were isochronally annealed up to ≈ 570 • C. Precipitation behaviour was studied by electrical resistometry and dierential scanning calorimetry. Mechanical properties were monitored by microhardness HV1 measurements. Transmission electron microscopy examinations and X-ray diraction of specimens quenched from temperatures of signicant resistivity changes helped to identify the microstructural processes responsible for these changes. Fine (sub)grain structure develops and ne coherent Al3Sc and/or Al3(Sc,Zr) particles precipitate during extrusion in both alloys. The distinct changes in resistivity (at temperatures above ≈ 330• C) of the AlMnScZr alloy are mainly caused by precipitation of Mn-containing particles. The easier diusion of Mn atoms along the (sub)grain boundaries is responsible for the precipitation of the Al6Mn and/or Al6(Mn,Fe) particles at relatively lower temperatures compared to the temperature range of precipitation of these particles in the classical mould-cast AlMnScZr alloys The apparent activation energy for precipitation of the Al3Sc and Al6Mn particles in the AlMnScZr alloy was determined as (106 ± 10) kJ mol −1 and (152 ± 33) kJ mol −1 , respectively.

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Section: Resultsmentioning

confidence: 65%

Section: Resultsmentioning

confidence: 71%

Section: Resultsmentioning

confidence: 79%

mentioning

confidence: 99%

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Microstructure, Thermal and Mechanical Properties of Non-Isothermally Annealed Al-Sc-Zr and Al-Mn-Sc-Zr Alloys Prepared by Powder Metallurgy

et al. 2012

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“…Al 3 Sc precipitates have a high creep resistance property, since its sluggish diffusivity, formation of fine and coherent Al 3 Sc precipitates with the L1 2 structure [11,12]. Researchers have reported that the additions of Sc and Zr can impede decomposition of supersaturated solid solutions and slow down precipitate phase coarsening.…”

Section: Introductionmentioning

confidence: 99%

A Scandium Modified Al-0.7 Fe Binary Alloy: Improvement of Creep- Resistance Property

Zhang¹,

Jiang²,

Ma³

et al. 2017

J Civil Environ Eng

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The creep behaviors and microstructures of Al-0.7Fe and Al-0.7Fe-0.2Sc alloy are investigated through creep tests, optical microscope, electron probe micro-analyze and transmission electron microscope observations. It is found that the steady state creep rates of Al-0.7Fe-0.2Sc are smaller than that of Al-0.7Fe under different temperatures at 70 Mpa. An overview of microstructure is given, the interactions between intermetallic phases and dislocations are investigated, with an emphasis on the Al 3 Sc precipitates. The mechanism controlling creep-resistance is explained by Orowan strengthening mechanism. The magnitude of

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Preparing Al‐Sc‐Zr Alloys in Aluminum Electrolysis Process

Qian¹,

Xue²,

Liu³

et al. 2013

Light Metals 2013

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Phase transformations in isochronally annealed mould-cast and cold-rolled Al–Sc–Zr-based alloy

Cited by 66 publications

References 26 publications

Microstructure, Thermal and Mechanical Properties of Non-Isothermally Annealed Al-Sc-Zr and Al-Mn-Sc-Zr Alloys Prepared by Powder Metallurgy

Microstructure, Thermal and Mechanical Properties of Non-Isothermally Annealed Al-Sc-Zr and Al-Mn-Sc-Zr Alloys Prepared by Powder Metallurgy

A Scandium Modified Al-0.7 Fe Binary Alloy: Improvement of Creep- Resistance Property

Preparing Al‐Sc‐Zr Alloys in Aluminum Electrolysis Process

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