Heat-resistant Al–0.2Sc–0.04Zr electrical conductor

Zhou, Weiwei; Cai, Bin; Li, W.J.; Liu, Z.X.; Shi, Yang

doi:10.1016/j.msea.2012.05.051

Cited by 61 publications

(31 citation statements)

References 15 publications

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“…When aging temperature is 150 °C , less influence of strain hardening could be observe, so UTS of the T8 treated alloy is lower than that of T9 treated one. The smaller precipitated phases by lower aging temperature brought the electron scattering effect [12], leading to the decrease of electrical conductivity (Figure 4). Therefore, it is crucial to obtain balanced mechanical and conductive properties by adjusting the aging temperature.…”

Section: Influence Of T8 and T9 Aging Treatment On Microstructure Andmentioning

confidence: 99%

Effects of Different Heat Treatment on Microstructure, Mechanical and Conductive Properties of Continuous Rheo-Extruded Al-0.9Si-0.6Mg (wt%) Alloy

Tie

Guan

Guo

et al. 2015

Metals

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Al-0.9Si-0.6Mg (wt%) alloy conductive wires were designed and produced by continuous rheo-extrusion process. The effects of different heat treatment on microstructure, mechanical and conductive properties of the wires were studied. Results show that, after T6 heat treatment, conductive property of the alloy increased while elongation decreased with the higher aging temperature and longer aging time. After T8 and T9 heat treatment, acicular strengthening phase β''-Mg2Si homogeneously precipitated, which effectively improved mechanical and conductive property of the alloy. The tensile strength, elongation and resistivity of T8 heat treated alloy reached 336 MPa, 13.7% and 29.3 nΩm respectively. After T9 heat treatment, the alloy's tensile strength, elongation and resistivity was 338 MPa, 6.0% and 30.2 nΩ·m respectively.

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Section: Influence Of T8 and T9 Aging Treatment On Microstructure Andmentioning

confidence: 99%

Effects of Different Heat Treatment on Microstructure, Mechanical and Conductive Properties of Continuous Rheo-Extruded Al-0.9Si-0.6Mg (wt%) Alloy

Tie

Guan

Guo

et al. 2015

Metals

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“…In the latter as pylons and missile tail cones 2 . Al-Zr alloys are precipitation hardening and present elevated thermal stability due to the precipitation of nanometer-scale metastable Al 3 Zr L1 2 precipitates 1,3,4 . These particles are coherent, thermodynamically stable 5 and provide hardening even after long times of heat-treatment (400 h) at temperatures of 698 K 6 and nucleate homogeneously in a high number density at the center of the dendrites, where supersaturation is greater 4,6 .…”

Section: Introductionmentioning

confidence: 99%

“…These particles are coherent, thermodynamically stable 5 and provide hardening even after long times of heat-treatment (400 h) at temperatures of 698 K 6 and nucleate homogeneously in a high number density at the center of the dendrites, where supersaturation is greater 4,6 . Al 3 Zr precipitates present a series of different morphologies, depending on processing conditions these may be spheroidal [6][7][8] , rod-like 6,8 , petal-like 6,9,10 , cauliflower 6 , cellular 11,12 and disk-like 13,14 . In Al-Zr alloys of hypoperitectic compositions (wt.% Zr < 0.28) 15 , Ness 8 showed that after aging at 733 K, an Al-0.18wt.%Zr alloy presented L1 2 -structured Al 3 Zr particles, that increased in size from ~20 to 70 nm in the range of 24 -700 h of aging time.…”

Section: Introductionmentioning

confidence: 99%

“…Al 3 Zr precipitates present a series of different morphologies, depending on processing conditions these may be spheroidal [6][7][8] , rod-like 6,8 , petal-like 6,9,10 , cauliflower 6 , cellular 11,12 and disk-like 13,14 . In Al-Zr alloys of hypoperitectic compositions (wt.% Zr < 0.28) 15 , Ness 8 showed that after aging at 733 K, an Al-0.18wt.%Zr alloy presented L1 2 -structured Al 3 Zr particles, that increased in size from ~20 to 70 nm in the range of 24 -700 h of aging time. The authors observed spherical particles mainly, although some rod-like particles are present in 〈100〉 matrix directions.…”

Section: Introductionmentioning

confidence: 99%

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Precipitation Evolution and Modeling of Growth Kinetics of L12-structured Al3Zr Particles in Al-0.22Zr and Al-0.32Zr (wt.%) Alloys Isothermally Aged

2017

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The microstructure and microhardness of isothermally aged Al-0.22Zr and Al-0.32Zr alloys were investigated. Peak microhardness occurred after aging at 650K for 100 h for both alloys and decreased slightly after aging at 400 h. Nanometer-scale spherical L1 2 -structured Al 3 Zr precipitates were observed using Transmission Electron Microscopy, these presented r < 7 nm at the center of dendrite branches. In the Al-0.32Zr alloy, particles increased in radius after aging at 650 K from 100 to 400 h while in the Al-0.22Zr alloy, precipitate radii remained constant in the same range. This is possibly due to solute migration to the periphery of dendritic branches, where larger particles nucleated. After aging at 700 K for 100h, there are growth instabilities at the interface of the particles. A theoretical model, used to predict particle growth by diffusion, presented good agreement with the experimental findings.

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“…[2][3][4][5][6][7][9][10][11] The complex nanostructure of the Al 3 (Sc,Zr) phase in aluminum has been discussed in several recent articles by studies using conventional and high-resolution transmission electron microscopy (TEM). [12,13] Atom-probe tomography (APT) was also employed to measure Sc,Zr concentration and distribution. [14][15][16] APT has shown that Sc-rich clusters can be formed in the early stages of precipitation above annealing temperatures of~523 K (250°C).…”

Section: Introductionmentioning

confidence: 99%

Early Stages of Precipitation Process in Al-(Mn-)Sc-Zr Alloy Characterized by Positron Annihilation

Vlach

Čı́žek

Melikhova

et al. 2015

Metall Mater Trans A

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Thermal effects on the precipitation stages in as-cast Al-0.70 at. pct Mn-0.15 at. pct Sc-0.05 at. pct Zr alloy were studied. The role of lattice defects was elucidated by positron annihilation spectroscopy (lifetime and coincidence Doppler broadening) enabling investigation of solutes clustering at the atomic scale. This technique has never been used in the Al-Sc-and/or Al-Zr-based alloys so far. Studies by positron annihilation were combined with resistometry, hardness measurements, and microstructure observations. Positrons trapped at defects are preferentially annihilated by Sc electrons. Lifetime of trapped positrons indicates that Sc atoms segregate at dislocations. Maximum fraction of positrons annihilated by Sc electrons occurring at 453 K (180°C) suggests that clustering of Sc bound with vacancies takes place. It is followed by peak of this fraction at 573 K (300°C). A rise of the contribution of trapped positrons annihilated by Zr electrons starting at 513 K (240°C) and attaining maximum also at 573 K (300°C) confirms that Zr participates in precipitation of the Al 3 Sc particles already at these temperatures. The pronounced hardening at 573 K (300°C) has its nature in the precipitation of the Al 3 Sc particles with a Zr-rich shell. The contribution of trapped positrons annihilated by Mn electrons was found to be negligible.

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Heat-resistant Al–0.2Sc–0.04Zr electrical conductor

Cited by 61 publications

References 15 publications

Effects of Different Heat Treatment on Microstructure, Mechanical and Conductive Properties of Continuous Rheo-Extruded Al-0.9Si-0.6Mg (wt%) Alloy

Effects of Different Heat Treatment on Microstructure, Mechanical and Conductive Properties of Continuous Rheo-Extruded Al-0.9Si-0.6Mg (wt%) Alloy

Precipitation Evolution and Modeling of Growth Kinetics of L12-structured Al3Zr Particles in Al-0.22Zr and Al-0.32Zr (wt.%) Alloys Isothermally Aged

Early Stages of Precipitation Process in Al-(Mn-)Sc-Zr Alloy Characterized by Positron Annihilation

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