Characterization of hot deformation behavior of as-homogenized Al–Cu–Li–Sc–Zr alloy using processing maps

Li, Bo; Pan, Qing‐Jiang; Yin, Zhi-min

doi:10.1016/j.msea.2014.07.031

Cited by 98 publications

(35 citation statements)

References 30 publications

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“…It is evident from Figure 3 that the flow stress increased dramatically to a peak value with a relatively slight strain at an early stage followed by a softening until to the maximum strain. This is because hot deformation is a competing process between working hardening and dynamic softening [22,23]. Increasing deformation temperature will speed up the thermal activation process; however, increasing strain rate will accelerate the generation and multiplication of dislocation and make it more difficult to increase deformation.…”

Section: Flow Stress Behaviormentioning

confidence: 99%

Hot Deformation Behavior of As-Cast and Homogenized Al0.5CoCrFeNi High Entropy Alloys

Wang

Niu

et al. 2016

Metals

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Abstract:The hot deformation behavior of as-cast and homogenized Al 0.5 CoCrFeNi high entropy alloys (HEAs) during isothermal compression was investigated as a function of temperature and strain rate. Results indicated that flow stress in a homogenized state was always higher than that in an as-cast state under the same deformation conditions. Moreover, the optimum thermo-mechanical processing (TMP) conditions for the hot working of the homogenized state were identified as 945-965 • C and 10 −1.7 -10 −1.1 s −1 and were easier to determine in practice. Constitutive equations, for both states, correlating the flow stress of Al 0.5 CoCrFeNi with strain rate and deformation temperature were also determined.

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Section: Flow Stress Behaviormentioning

confidence: 99%

Hot Deformation Behavior of As-Cast and Homogenized Al0.5CoCrFeNi High Entropy Alloys

Wang

Niu

et al. 2016

Metals

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“…Reports have shown that DRV or DRX occurs related to Zener-Hollomon parameters, and lnZ value has been combined the effect of strain rate and deformation temperature for microstructure evolution [8][9][10][11][12]. Liu et al [10] investigated the hot deformation behavior of AA7085 aluminum alloy.…”

Section: Introductionmentioning

confidence: 99%

Research on the hot deformation behavior of Al–6.2Zn–0.70Mg–0.3Mn–0.17Zr alloy using processing map

Yan

Pan

et al. 2015

Journal of Alloys and Compounds

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“…In addition, there is a particular instability domain at a temperature ranges from 300 to 350°C and a strain rate range from 0.001 to 0.02 s -1 . To our knowledge, this has not been reported in Al-Cu-Li-Sc-Zr alloy [12], 2099 Al alloy [11] and also 7050 Al alloy [26]. A detailed description of unsafe processing domains is shown in Table 3.…”

Section: Processing Mapsmentioning

confidence: 93%

“…2e, which is a typical phenomenon showing partial dynamic recrystallization [17]. Deformation temperatures and strain rates have a significant influence on microstructure evolution [12,28]. Figure 10 shows the TEM images of the specimens deformed at different temperatures and strain rates.…”

Section: Microstructurementioning

confidence: 99%

“…Chen et al [11] investigated the hot deformation behavior and processing maps of 2099 alloy using hot tensile tests and found that an instability domain was obtained in the temperature and strain rate ranges: 250-260°C and 0.1-0.5 s -1 . Li et al [12] studied the hot deformation behavior of Al-Cu-Li-Sc-Zr alloy and its microstructure evolution.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Hot Deformation Behavior of a Novel Al–Cu–Li Alloy Using Processing Maps

Yiran

Yin

et al. 2015

Acta Metall. Sin. (Engl. Lett.)

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The isothermally compression deformation behavior of an elevated Cu/Li weight ratio Al-Cu-Li alloy was investigated under various deformation conditions. The isothermal compression tests were carried out in a temperature range from 300 to 500°C and at a strain rate range from 0.001 to 10 s -1 . The results show that the peak stress level decreases with temperature increasing and strain rate decreasing, which is represented by the Zener-Hollomon parameter Z in the hyperbolic sine equation with the hot deformation activation energy of 218.5 kJ/mol. At low Z value, the dynamic recrystallized grain is well formed with clean high-angle boundaries. At high Z value, a high dislocation density with poorly developed cellularity and considerable fine dynamic precipitates are observed. Based on the experimental data and dynamic material model, the processing maps at strain of 0.3, 0.5 and 0.7 were developed to demonstrate the hot workability of the alloy. The results show that the main softening mechanism at high Z value is precipitate coarsening and dynamic recovery; the dynamic recrystallization of the alloy can be easily observed as ln Z B 29.44, with peak efficiency of power dissipation of around 70%. At strains of 0.3, 0.5 and 0.7, the flow instability domains are found at higher strain rates, which mainly locate at the upper part of processing maps. In addition, when the strain rate is 0.001 or 0.02 s -1 , there is a particular instability domain at 300-350°C.

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Characterization of hot deformation behavior of as-homogenized Al–Cu–Li–Sc–Zr alloy using processing maps

Cited by 98 publications

References 30 publications

Hot Deformation Behavior of As-Cast and Homogenized Al0.5CoCrFeNi High Entropy Alloys

Hot Deformation Behavior of As-Cast and Homogenized Al0.5CoCrFeNi High Entropy Alloys

Research on the hot deformation behavior of Al–6.2Zn–0.70Mg–0.3Mn–0.17Zr alloy using processing map

Characterization of Hot Deformation Behavior of a Novel Al–Cu–Li Alloy Using Processing Maps

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