Investigation of the connection between the microstructure and thermomechanical properties in structured AlCu-based alloys

Schmidt, U.; Unger, Ronald E.; Gerloff, R.

doi:10.1007/bf01209248

Cited by 4 publications

(2 citation statements)

References 14 publications

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“…Figure 4 shows a comparison between a DSC thermogram and the evolution of the mean positron life during an isochronal run. This example refers to Al-4.5 wt% Cu-0.56 wt% Mg; the data reported in the figure are taken from Schmidt et al (1995). It is clear, however, that the interpretation of PAS results in terms of a decomposition sequence needs the support of previous knowledge drawn from DSC and from various microscopies.…”

Section: Formation and Dissolution Of Gp Zones And Precipitatesmentioning

confidence: 99%

Current positron studies of structural modifications in age-hardenable metallic systems

Dupasquier

Folegati

Diego

et al. 1998

J. Phys.: Condens. Matter

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The sensitivity of positron annihilation characteristics to the structural changes occurring in supersaturated metallic systems has been demonstrated and explained since the early 1980s. This knowledge is currently applied for positron annihilation spectroscopy (PAS) investigations regarding the main phenomena that govern the structural evolution of a supersaturated alloy when various thermal treatments are applied: (a) kinetics of vacancy-type defects retained after quenching; (b) solute migration; (c) formation of solute clusters and/or GP zones; (d) precipitation. The analysis of PAS data gives information on the chemical composition, the defect structure and the density of decomposition products of nanometric size. The present article, that includes an exhaustive repertory of works published since 1987, discusses the value of the contribution that PAS studies can give to physical metallurgy in the field of age-hardenable systems. Most examples are taken from the direct experience of the authors.

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Section: Formation and Dissolution Of Gp Zones And Precipitatesmentioning

confidence: 99%

Current positron studies of structural modifications in age-hardenable metallic systems

Dupasquier

Folegati

Diego

et al. 1998

J. Phys.: Condens. Matter

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“…These phases with relatively small n A can not exist stably in high temperature condition and only exist stably in low temperature stage. With increasing of temperature, phases with small n A may dissolute first [13]. It caused that GP zones and θ'' could exist stability in low temperature, θ' and θ which with good thermal stability could appear in high temperature stage.…”

Section: Resultsmentioning

confidence: 99%

Calculation of Valence Electron Structure of Precipitate Phases in Al-Cu Cast Alloy

Tian

Wang

et al. 2011

AMR

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Based on Empirical Electron Theory in solid (EET) and Bond Length Difference (BLD) the valence electron structures of precipitates in AlCu alloy during aging process were calculated. The results show that the different phase structure factors explain the thermal stability of phases in θ sequence, and the tendency of atoms solution is corresponding with the phase transition during aging from valence electron structure levels, which reveals the inside causes of ageing hardening is closely related to the covalent electron pairs in some bond of the precipitations and matrix.

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Positron lifetime studies of decomposition in 2024 (Al-Cu-Mg) and 7010 (Al-Zn-Cu-Mg) alloys

et al. 1998

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Investigation of the connection between the microstructure and thermomechanical properties in structured AlCu-based alloys

Cited by 4 publications

References 14 publications

Current positron studies of structural modifications in age-hardenable metallic systems

Current positron studies of structural modifications in age-hardenable metallic systems

Calculation of Valence Electron Structure of Precipitate Phases in Al-Cu Cast Alloy

Positron lifetime studies of decomposition in 2024 (Al-Cu-Mg) and 7010 (Al-Zn-Cu-Mg) alloys

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