The effect of Si on precipitation in Al–Cu–Mg alloy with a high Cu/Mg ratio

Liu, Long; Chen, J.H.; Wang, Shuangbao; Liu, C.H.; Yang, Shouliang; Wu, C.L.

doi:10.1016/j.msea.2014.03.079

Cited by 70 publications

(30 citation statements)

References 28 publications

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“…The first one is disordered L-like particles on semi-coherent edges or on {100}Al ledges of θ' plates. Similar complexes were found in an alloy with a higher Cu/Mg ratio [51].…”

Section: θ'-C Platessupporting

confidence: 76%

A hybrid aluminium alloy and its zoo of interacting nano-precipitates

Wenner

Marioara

Andersen

et al. 2015

Materials Characterization

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An alloy with aluminium as its base element is heat treated to form a multitude of precipitate phases known from different classes of industrial alloys: Al-Cu(-Mg), Al-Mg-Si-Cu, and Al-Zn-Mg. Nanometer-sized needle-shaped particles define the starting point of the phase nucleation, after which there is a split in the precipitation sequence into six phases of highly diverse compositions and morphologies. There are several unique effects of phases from different alloy systems being present in the same host lattice, of which we concentrate on two: the replacement of Ag by Zn on the Ω interface and the formation of combined plates of the θ' and C phases. Using atomically resolved scanning transmission electron microscopy and energy-dispersive X-ray spectroscopy, we investigate the formation mechanisms, crystal structures and compositions of the precipitates.

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“…The first one is disordered L-like particles on semi-coherent edges or on {100}Al ledges of θ' plates. Similar complexes were found in an alloy with a higher Cu/Mg ratio [51].…”

Section: θ'-C Platessupporting

confidence: 76%

A hybrid aluminium alloy and its zoo of interacting nano-precipitates

Wenner

Marioara

Andersen

et al. 2015

Materials Characterization

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“…6 for co mparison. By comparing with HAADF images reported in the literature (Bourgeois et al, 2011;Liu et al, 2014), the precipitates in SFA and 60SA samp les are identified as G.P. Zones and θ" phase, while those in 180S FA and 180SA samples are G.P.…”

Section: Bi-modal Precipitation Microstructurementioning

confidence: 89%

“…Aluminu m-Copper AA2219 alloy is currently widely used to manufacture light weight structural co mponents for aerospace applications. The precipitation sequence in an Al-Cu alloy during art ificial ageing treatment is generally accepted as (Biswas et al, 2011;Bourgeois et al, 2011;Guin ier, 1938;Liu et al, 2014;Ma et al, 2016): Supersaturated solid solution→ G.P. Zones→ θ"→ θ' (Al 2 Cu).…”

Section: Introductionmentioning

confidence: 99%

Stress-level-dependent microstructure evolution and deformation behaviors during creep age forming of AA2219 alloy

Zhan

Liu

et al. 2018

MATEC Web Conf.

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Creep age forming (CAF) can shape and strengthen the sheet metals loaded externally at elevated temperature by corresponding creep/stress-relaxation and age hardening. Understanding the deformation and strengthening behavior at different stress levels plays a pivotal role in accurate prediction of CAF. This work experimentally investigates the effect of stress level on the evolution of both properties and microstructures, including precipitates and dislocations, during CAF. The microstructural evolution is characterized in detail by scanning/transmission electron microscopy (S/TEM) and X-ray diffraction (XRD). Stress orienting effect of θ» occurs at low-stress loaded samples and results in a decline in the hardening potential of creep-aging. A bimodal distribution of precipitates consisted of θ» homogeneously formed in the matrix and θ' heterogeneously formed on dislocations is found in the high-stress loaded samples, giving rise to a significant enhancement of hardening response. In addition, the creep strain increases drastically when the loading stress is higher than the initial yield strength. The relevant mechanisms for the transition of the obtained strength and creep behaviors with the applied stress are discussed based on microstructure observations.

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“…The predicted transformed fraction of θ-Al 2 Cu during aging at 350 • C (Figure 6b) rise in a significant manner right at the beginning of aging, while for the Al-3.5 wt%Cu alloy, it took at least 10 h to obtain a significant rise of the fraction transformed at the same temperature. It appears therefore that, due to differences in Si content [46,47], the growth of θ-Al 2 Cu precipitates occurs extremely faster in AlSi7Cu3.5Mg0.15 (Mn, Zr, V) alloy than in a binary Al-Cu alloy. Table 5.…”

Section: Calorimetric Precipitation Studymentioning

confidence: 99%

Precipitation Kinetics and Evaluation of the Interfacial Mobility of Precipitates in an AlSi7Cu3.5Mg0.15 Cast Alloy with Zr and V Additions

Heugue

Larouche

Breton

et al. 2019

Metals

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Recent environmental restrictions constrained car manufacturers to promote cast aluminum alloys working at high temperatures (180 °C–300 °C). The development of new alloys permits the fabrication of higher-strength components in engine downsizing. Those technologies increase internal loadings and specific power and stretch current materials to their limits. Transition metals in aluminum alloys are good candidates to improve physical, mechanical, and thermodynamic properties with the aim of increasing service life of parts. This study is focused on the modified AlSi7Cu3.5Mg0.15 alloy where Mn, Zr, and V have been added as alloying elements for high-temperature applications. The characterization of the cast alloy in this study helps to evaluate and understand its performance according to their physical state: As-cast, as-quenched, or artificially aged. The precipitation kinetics of the AlSi7Cu3.5Mg0.15 (Mn, Zr, V) alloy has been characterized by differential scanning calorimetry (DSC), transmission electron microscopy (TEM) observations, and micro-hardness testing. The Kissinger analysis was applied to extract activation energies from non-isothermal DSC runs conducted at different stationary heating rates. Finally, first-order evaluations of the interfacial mobility of precipitates were obtained.

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The effect of Si on precipitation in Al–Cu–Mg alloy with a high Cu/Mg ratio

Cited by 70 publications

References 28 publications

A hybrid aluminium alloy and its zoo of interacting nano-precipitates

A hybrid aluminium alloy and its zoo of interacting nano-precipitates

Stress-level-dependent microstructure evolution and deformation behaviors during creep age forming of AA2219 alloy

Precipitation Kinetics and Evaluation of the Interfacial Mobility of Precipitates in an AlSi7Cu3.5Mg0.15 Cast Alloy with Zr and V Additions

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