Natural aging behaviors of Al-Cu-Li alloy: PLC effect, properties and microstructure evolution

Wu, Cuiming; Li, Hengyun; Bian, T.J.; Lei, Chao; Zhang, L.W.

doi:10.1016/j.matchar.2021.111694

Cited by 32 publications

(8 citation statements)

References 35 publications

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“…The grain structure observation samples were anodic coated with film at a voltage of 25 V, and the composition of the coating solution was 1% HF + 1% HBF 4 + 24% C 2 H 5 OH + 74% H 2 O. It can be seen that a large number of micron-sized gray second-phase particles, which were the Al Mg Fe crystal phase, formed in the solidification and crystallization process of the alloy ingot [4]. After hot rolling, the particles were broken and distributed in a streamline in the aluminum matrix.…”

Section: Methodsmentioning

confidence: 99%

“…Figure 3 shows the SEM images and the results of the energy spectrum analysis of quenched Al-(2.86~9.41) Mg alloy sheets. The second-phase particles of the gray-black polygonal second-phase particles of 0.25-2.5 μm in the alloy sheets were the Al Mg Fe phase [4], which is an insoluble alloy phase precipitated by crystallization during the cast- Figure 3 shows the SEM images and the results of the energy spectrum analysis of quenched Al-(2.86~9.41) Mg alloy sheets. The second-phase particles of the gray-black polygonal second-phase particles of 0.25-2.5 µm in the alloy sheets were the Al Mg Fe phase [4], which is an insoluble alloy phase precipitated by crystallization during the casting solidification process.…”

Section: Methodsmentioning

confidence: 99%

“…The second-phase particles of the gray-black polygonal second-phase particles of 0.25-2.5 μm in the alloy sheets were the Al Mg Fe phase [4], which is an insoluble alloy phase precipitated by crystallization during the cast- Figure 3 shows the SEM images and the results of the energy spectrum analysis of quenched Al-(2.86~9.41) Mg alloy sheets. The second-phase particles of the gray-black polygonal second-phase particles of 0.25-2.5 µm in the alloy sheets were the Al Mg Fe phase [4], which is an insoluble alloy phase precipitated by crystallization during the casting solidification process. It cannot be dissolved into the matrix by homogenization treatment, and the subsequent hot rolling will break it into broken chains.…”

Section: Methodsmentioning

confidence: 99%

“…[ 1 , 2 , 3 ]. In recent decades, many studies have investigated the influence of solid solution atomic diffusion [ 4 , 5 ] and tensile rate [ 2 , 6 ] on the PLC characteristic parameters of aluminum alloys. Peng et al [ 7 ] found that there was a critical temperature Tt = 49 °C for the tensile deformation of an annealed 3034 aluminum alloy between −50~200 °C.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3]. In recent decades, many studies have investigated the influence of solid solution atomic diffusion [4,5] and tensile rate [2,6] on the PLC characteristic parameters of aluminum alloys. Peng et al [7] found that there was a critical temperature Tt = 49 • C for the tensile deformation of an annealed 3034 aluminum alloy between −50~200 • C. When the tensile temperature was below 49 • C, the critical strain corresponding to the occurrence of the PLC shearing band ε c was negatively correlated with the tensile temperature because the DSA was mainly controlled by the interaction between solute Mg atoms and movable dislocations; that is, the ε c decreased gradually with increasing tensile temperature.…”

Section: Introductionmentioning

confidence: 99%

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Portevin-Le Chatelier Characterization of Quenched Al-Mg Alloy Sheet with Different Mg Concentrations

et al. 2022

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In the present study, the PLC characteristic parameters and DSA mechanism of Al-(2.86~9.41) Mg alloy sheets were investigated during tensile testing at room temperature with a tensile rate of 1 × 10−3 s−1. On the basis of the solution Mg concentrations in the α-Al matrix, the initial vacancy concentration, the second-phase particle configuration and the recrystallized grain configuration are almost the same by quenching treatment. The results show that the type of room-temperature tensile stress–strain curves of quenched Al-(2.86~9.41) Mg alloy sheets varied according to the Mg content. The type of stress–strain curve of the Al-2.86Mg alloy sheet was B + C, while the type of stress–strain curve of the Al-(4.23~9.41) Mg alloy sheets was C. When the quenched Al-(2.86~9.41) Mg alloy sheets were stretched at room temperature, the strain cycle of the rectangular waves corresponding to the high stress flow ΔεTmax and stress drop amplitude Δσ on the zigzag stress–strain curve of alloy sheets increased with increasing the Mg content. Moreover, the strain cycle of ΔεTmax and Δσ on the stress–strain curve of alloy sheets increased gradually with increasing tensile deformation. The yield stress of quenched Al-(2.86~9.41) Mg alloy sheets increased gradually with increasing the Mg content. Moreover, the critical strain corresponding to yield stress εσ and the critical strain corresponding to the occurrence of the PLC shearing band εc of alloy sheets both increased with increasing the Mg content. However, the difference in flow strain value Δεc−σ between εc and εσ of alloy sheets decreased gradually with increasing the Mg content.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%