Effect of melt treatment on the microstructure and mechanical properties of an AA3003 aluminum alloy

Chen, G.; Guo, Fu; Tang, Wu‐Neng; Cheng, Chun; Lin, Sen; Li, Song

doi:10.17222/mit.2017.207

Cited by 5 publications

(5 citation statements)

References 18 publications

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“…The research group recently conducted preliminary studies on the melt treatment and hot deformation of 3003 aluminum alloys. A close relationship between melt treatment and hot deformation was found [8,9]. In order to further improve the product quality of 3003 aluminum alloys, it is necessary to establish a predictive model between its microstructure and performance.…”

Section: Introduction mentioning

confidence: 89%

Establishment of Prediction Model of Microstructure and Properties of 3003 Aluminum Alloy during Hot Deformation

Chen

Fu²,

Wei³

et al. 2019

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The 3003 aluminum alloy was deformed by isothermal compression in the range of deformation temperature 300 – 500 ℃ at strain rate 0.0l – 10.0 s-1 with Gleeble-1500 thermal simulator. A constitutive equation is established from the flow stress of the hot deformation. It is found that the average grain size of the 3003 aluminum alloy increases with the decrease of Zener-Hollomon (Z) value, and there is a linear correlation between them. The prediction model of the steady-state flow stress and the average grain size is established. The steady-state flow stress increases with the decrease of the average grain size. The microhardness of the 3003 aluminum alloy has a positive linear relationship with lnZ, and the relationship between the microhardness and the grain size meets the Hall-Petch equation, which can provide a reference for the microstructure control and rolling equipment selection of the 3003 aluminum alloy under hot deformation conditions.

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Section: Introduction mentioning

confidence: 89%

Establishment of Prediction Model of Microstructure and Properties of 3003 Aluminum Alloy during Hot Deformation

Chen

Fu²,

Wei³

et al. 2019

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“…According to the measurement of EDS attached to the SEM, the phase is rich in Al and Cu which is primarily metastable AlCu(θ', θ") and stable Al 2 Cu(θ) particles appearing as coherent and semi-coherent phases, respectively [32]. Dislocations are pinned by the dispersion of the secondary phase bringing an improving effect on the mechanical properties, especially at high temperature, for its thermal stability, nevertheless the second phase particles are widely believed to have adverse effects on the mechanical properties, due to their contribution to crack initiation, crack growth, and corrosion [33].…”

Section: Dynamic Mechanical Behaviormentioning

confidence: 99%

High Strain Rate Behavior of Ultrafine Grained AA2519 Processed via Multi Axial Cryogenic Forging

Azimi

Owolabi

Fallahdoost

et al. 2019

Metals

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The present work deals with studies on the dynamic behavior of ultrafine grained AA2519 alloy synthesized via cryogenic forging (CF) and room temperature forging (RTF) techniques. A split-Hopkinson pressure bar was used to perform high strain rate tests on the processed samples and the microstructures of the samples were characterized before and after impact tests. Electron backscatter diffraction (EBSD) maps demonstrated a significant grain size refinement from ~740 nm to ~250 nm as a result of cryogenic plastic deformation showing higher dislocation densities and stored strains in the CF sample when compared to the RTF sample. This microstructure modification caused the increase of dynamic flow stress in this alloy. In addition, the aluminum matrix of the CF alloy is more densely populated with fragmented particles than the RTF alloy due to the heavier plastic deformation applied to the cryogenically forged alloy. The results obtained from the stress–strain curve for the RTF sample showed intense thermomechanical instabilities in the RTF sample which led to a severe thermal softening and the subsequent sharp drop in the flow stress. However, no significant decrease was observed in the stress–strain curve of the CF alloys with ultrafine grains which means that thermal softening would probably not be the most effective failure mechanism. Furthermore, higher level of sensitivity of CF alloys to strain rates was observed which is ascribed to transition of rate-controlling plastic deformation mechanisms. In the post-mortem microstructure investigation, deformed and transformed adiabatic shear bands (ASBs) were identified on the RTF alloy when the strain rate is over 4000 s−1 at which it had experienced a significant thermal softening. On the other hand, circular path and aligned split arcs are the various shapes of the deformed ASB seen at no earlier than 4500 s−1 in the CF alloys. This is associated with the crack failure caused by grain boundary sliding.

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“…16 The moving distance of the dislocation increases, the dislocation density gradually decreases, and the repeated polygonal process occurs, which make the grain boundary clear and sharp, and cause some of the sub-grains with the same orientation to combine and grow, thus forming a larger size, and a more complete sub-grain structure. 17 When the deformation temperature increases to 500°C, the interplanetary dislocation density is further reduced, and the size of the merged sub-grain increases. Through the merging and growth of the sub-grains or strain-induced grain-boundary migration, DRX occurs, as shown in Figure 2c.…”

Section: Effect Of the Deformation Temperature On The Microstructurementioning

confidence: 99%

Effects of deformation temperature on the microstructure and mechanical properties of the AA3003 aluminium alloy

Chen¹,

Guo²,

Lin³

et al. 2018

Mater. Tehnol.

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The AA3003 aluminium alloy was deformed by isothermal compression in the deformation temperature range 300-500°C at a strain rate of 0.l s-1 with a Gleeble-1500 thermal simulator. The microstructure of the alloy was observed by OM and TEM, and the hardness was measured with a microhardness tester. The results show that the flow stress decreases with an increase of the deformation temperature. The dislocation density in the grain is large, and the polygonal structure occurs in the local area under low-temperature conditions. When the temperature reaches 400°C, the dislocation density decreases gradually, and the repetitive polygonal process occurs. The deformation mechanism is changed from dynamic recovery to dynamic recrystallization (DRX). The DRX volume fraction and grain size increase with an increase of the deformation temperature. The relationship between the micro-Vickers hardness and the DRX grain size of the alloy after hot deformation agrees with the Hall-Petch equation. At the strain rate of 0.1 s-1 , the optimum temperature of hot deformation for the alloy is about 400°C.

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Effect of melt treatment on the microstructure and mechanical properties of an AA3003 aluminum alloy

Cited by 5 publications

References 18 publications

Establishment of Prediction Model of Microstructure and Properties of 3003 Aluminum Alloy during Hot Deformation

Establishment of Prediction Model of Microstructure and Properties of 3003 Aluminum Alloy during Hot Deformation

High Strain Rate Behavior of Ultrafine Grained AA2519 Processed via Multi Axial Cryogenic Forging

Effects of deformation temperature on the microstructure and mechanical properties of the AA3003 aluminium alloy

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