Influence of electric field on microstructure and mechanical properties of an Al-Cu-Li alloy during ageing

Shou, Wenbin; Yi, Danqing; Yi, Ruowei; Liu, Huiqun; Bao, Z.L.; Wang, Bin

doi:10.1016/j.matdes.2016.03.013

Cited by 24 publications

(8 citation statements)

References 38 publications

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“…TEM was used to identify the precipitation of the aged samples, and the typical microstructures and corresponding selected area electron diffraction (SAED) patterns were presented in Figure 4. To clearly identify the diffraction spots obtained from our sample, the model SAED patterns of δ , T 1 and α-Al taken along [112] Al were sketched and presented in Figure 4(g) [13,31]. As shown in Figure 4(a, c and e), while there exists minor spherical δ' (Al 3 Li) precipitates after RST treatment (Figure 4(a)), δ' (Al 3 Li) precipitates disappeared after EST treatment.…”

Section: Effect Of Ests On Precipitatesmentioning

confidence: 99%

“…Moreover, the cold work before aging led to the formation of more δ', θ', T 1 and S' (Al 2 CuMg) phases compared to the unstretched alloy by increasing the dislocation density [12]. An electric field applied on an Al-Cu-Li alloy during aging accelerated the precipitation of β'/δ' and the growth of θ ' and hence improved the mechanical properties of the alloy [13]. Owing to the blocking effect of grain boundaries on the dislocation motion, the grain refinement could contribute to the mechanical properties of the Al-Cu-Li alloy also [14,15].…”

Section: Introductionmentioning

confidence: 99%

“…The enhancement of the precipitation strengthening effect relies on the size, distribution and volume fraction of secondary precipitated phases during aging. To promote the precipitation, various investigations on aging of Al–Cu–Li alloys have been performed [10–13]. Douglas J. Waldron performed a duplex aging of Al–Cu–Li–Sc alloy in U.S. Patent No.…”

Section: Introductionmentioning

confidence: 99%

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Effects of enhanced solution treatment on microstructure and mechanical properties of Al–Cu–Li–Sc alloy

Yang

Zhi

Wang

et al. 2018

Materials Science and Technology

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Two enhanced solution treatments (ESTs) were applied to an Al–Cu–Li–Sc alloy. Results showed that the ESTs reduced the amount and size of the soluble phases, and promoted the recrystallisation of the α–Al matrix and the precipitation of the Al2CuLi precipitate (T1), which improved the yield strength, tensile strength and elongation of the alloy. Although the precipitation strengthening of the T1 phase and the strengthening resulting from grain refinement of the α–Al matrix caused by the recrystallisation contributed equally to the strength increment, the EST process led to a greater proportional increase in the strengthening resulting from grain refinement than it did in the precipitation strengthening of the alloy.

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Section: Effect Of Ests On Precipitatesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of enhanced solution treatment on microstructure and mechanical properties of Al–Cu–Li–Sc alloy

Yang

Zhi

Wang

et al. 2018

Materials Science and Technology

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“…Recently, the external energy fields such as magnetostatic or electrostatic fields have been reported to show influences on the heat treatment behavior of Al or Mg alloys. [ 19–24 ] It should be first mentioned that no electric current is generated inside the treated samples by external fields. Li et al [ 19 ] showed that the nucleation rate and the mean growth rate of DP nodule in Mg–9Al–1Zn alloy (in wt%) was decreased by magnetostatic field (intensity 10 T), which was speculated to be due to influences on diffusion behavior.…”

Section: Introductionmentioning

confidence: 99%

“…The electrostatic field was found to reduce Gibbs free energy (Δ Gs ) of Mg 2 Si phase, which made the solution process of AA6022 Al–Mg–Si alloy more efficient and then the ageing response much stronger. [ 21 ] More obviously, electrostatic field could promote ageing process of Al–4.2Cu–1.4Mg–0.6Mn [ 22 ] and Al–2.8Cu–1.3Li–0.3Mn–0.1Zr alloys, [ 23 ] which increased the hardness at initial ageing stage and mechanical properties. Fu et al [ 24 ] reported that the size of GP zone of Al–4Cu alloy during the early stage ageing was refined from 10 to 2–4 nm by electrostatic field, and the distribution of GP zone was much denser, which reduced the coarsening rate of GP zone.…”

Section: Introductionmentioning

confidence: 99%

Influence of Electrostatic Field on the Microstructure and Mechanical Properties of AZ91 Mg Alloy during Ageing Treatment

et al. 2020

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The effects of electrostatic field on the microstructure and mechanical properties of AZ91 alloy during ageing treatment are studied. It is shown that electrostatic field can modify the precipitate distributions. With the help of electrostatic field (intensity 4 kV cm−1), the continuous precipitate (CP) is refined, whereas the discontinuous precipitate (DP) is suppressed to some extent. The tensile yield strength of peak‐aged AZ91 alloy is improved from 156 to 169 MPa. The mechanism by which the electrostatic field modifies the precipitate distributions is discussed via the resistivity data combined with the classical theory of vacancy‐dominant diffusion. It is shown that the electrostatic field probably enhances the bulk diffusion and then improves the competitiveness of CP against DP.

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Modeling of Void‐Mediated Cracking and Lithium Penetration in All‐Solid‐State Batteries

Wang

Chen³

et al. 2023

Adv Funct Materials

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All‐solid‐state batteries (ASSBs) are expected to have an exceptional energy density and safety owing to the possibilities of direct usage of lithium as an anode and the suppression of dendrites by a solid‐state electrolyte (SSE). However, recent experiments unveil discharging‐induced voids in lithium‐SSE interfaces and charging‐induced cracks in SSE, wherein lithium penetration occurs. To avoid such cell failures, a theoretical model rendering high‐credibility simulations is needed to assist ASSB designs. Herein, such a model coupling the electrochemical processes and mechanical responses of an ASSB are proposed, in which the kinetics of voids and cracks are the key ingredients. Numerical simulations based on the model reveal that void growth is the result of stripping with disparate diffusivity in the surface layer and the bulk of lithium. They bring about the non‐uniform distribution of Li+ during electroplating, a damage zone near the interface, SSE cracking, and then lithium plating in the cracks. It is noted that the cracks and lithium dendrites revealed by the simulations are very similar to those observed in in situ experiments and that a high stack pressure cannot inhibit cracking and lithium penetration. Instead, suitable lateral compressive stresses can prevent SSE from cracking and therefore inhibit lithium dendrites.

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Influence of electric field on microstructure and mechanical properties of an Al-Cu-Li alloy during ageing

Cited by 24 publications

References 38 publications

Effects of enhanced solution treatment on microstructure and mechanical properties of Al–Cu–Li–Sc alloy

Effects of enhanced solution treatment on microstructure and mechanical properties of Al–Cu–Li–Sc alloy

Influence of Electrostatic Field on the Microstructure and Mechanical Properties of AZ91 Mg Alloy during Ageing Treatment

Modeling of Void‐Mediated Cracking and Lithium Penetration in All‐Solid‐State Batteries

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