High temperature deformation behavior of Al–Cu–Mg alloys micro-alloyed with Sn

Banerjee, Sanjib; Robi, P. S.; Srinivasan, A.; Kumar, Lakavath Praveen

doi:10.1016/j.msea.2010.01.052

Cited by 62 publications

(22 citation statements)

References 27 publications

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“…And the expression was represented as: (6) Equation (6) presents the relationship between deformation behavior and deformation conditions. It is obvious that Z increased with increasing strain rate and decreasing deformation temperature, which was similar to the variation of the peak flow stress [15]. As is shown in Fig.…”

Section: Constitutive Equationsupporting

confidence: 76%

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Hot tensile deformation behavior of twin roll casted 7075 aluminum alloy

Wang

Lee

et al. 2015

Met. Mater. Int.

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High temperature deformation behavior of the 7075 aluminum alloy sheets fabricated by twin roll casting and rolling was investigated by hot tensile tests at different temperatures from 350 to 500°C and various initial strain rates from 1×10 -3 to 1×10 -2 s -1. The results show that flow stress increased with increasing initial strain rate and decreasing deformation temperature. A large elongation of 200% was obtained at relatively high strain rate of 5×10 -3 s -1 at 450°C. It is closely related with the grain boundary sliding at elevated temperature attributed to the recrystallized fine grains and the large volume fraction of high-angle grain boundaries. The fracture transformation mechanism changes from ductile transgranular fracture to ductile intergranular fracture due to the recrystallized fine grains at high temperature. High density and uniform cavities observed in large elongation samples at high temperature reveals the contribution of grain boundary sliding. Necking-controlled failure mode was characterized by rare cavities with low elongation.

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Section: Constitutive Equationsupporting

confidence: 76%

“…Following constitutive equations are found to be most suitable for application in high temperature deformation over a wide range stresses [15].…”

Section: Constitutive Equationmentioning

confidence: 99%

Hot tensile deformation behavior of twin roll casted 7075 aluminum alloy

Wang

Lee

et al. 2015

Met. Mater. Int.

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“…The constitutive equations have commonly been applied in high temperature deformation as following [16]:…”

Section: Constitutive Equationmentioning

confidence: 99%

Effect of heat treatment on hot deformation behavior and microstructure evolution of 7085 aluminum alloy

Chen

Guo-sheng

et al. 2012

Journal of Alloys and Compounds

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“…The values of g and the instability region at different deformation temperatures and strain rates can be obtained based on Eqs. (17) and (18). It is observed from Fig.…”

Section: Processing Mapsmentioning

confidence: 69%

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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High temperature deformation behavior of Al–Cu–Mg alloys micro-alloyed with Sn

Cited by 62 publications

References 27 publications

Hot tensile deformation behavior of twin roll casted 7075 aluminum alloy

Hot tensile deformation behavior of twin roll casted 7075 aluminum alloy

Effect of heat treatment on hot deformation behavior and microstructure evolution of 7085 aluminum alloy

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

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