Processing map for hot working of spray formed and hot isostatically pressed Al–Li alloy (UL40)

Reddy, G. Jagan; Srinivasan, N.; Gokhale, A.M.; Kashyap, B.P.

doi:10.1016/j.jmatprotec.2009.07.016

Cited by 57 publications

(4 citation statements)

References 29 publications

(30 reference statements)

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“…Besides, the cost of Al-Li alloys is higher than that of traditional Al alloys because of the ageing conditions and comparable strength. Therefore, various studies have been carried out to investigate metal forming technologies (i.e., hydroforming, impact hydroforming, stamping, bending, and superplastic forming) under different working conditions (i.e., cold, warm, and hot deformation) to identify an alternative manufacturing route and to optimize the working conditions to decrease the higher costs related to the addition of Li and the manufacturing of sound, complex shape components from Al-Li alloys [19] , [20] , [21] , [22] , [23] , [24] , [25] , [26] , [27] , [28] , [29] , [30] , [31] , [32] , [33] , [34] , [35] , [36] , [37] , [38] , [39] , [40] , [41] , [42] , [43] , [44] , [45] , [46] , [47] , [48] , [49] .…”

Section: Introductionmentioning

confidence: 99%

Strengthening mechanisms, deformation behavior, and anisotropic mechanical properties of Al-Li alloys: A review

El-Aty

Guo

et al. 2018

Journal of Advanced Research

476

124

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Section: Introductionmentioning

confidence: 99%

Strengthening mechanisms, deformation behavior, and anisotropic mechanical properties of Al-Li alloys: A review

El-Aty

Guo

et al. 2018

Journal of Advanced Research

476

124

View full text Add to dashboard Cite

show abstract

“…At the same strain rate, the flow stress decreases with the increase of drawing temperature. These are related to the dynamic recovery of the alloy and the dynamic recrystallization softening mechanism [11]. A certain degree of wavy change appears on the true stress-true strain curve with a strain rate of 0.0001 s -1 (figure 1c), which exhibits discontinuous dynamic recrystallization characteristics [12].…”

Section: Resultsmentioning

confidence: 99%

Flow Stress Behavior of Al-3.5Cu-1.0Li-0.4Mg-0.6Zn-0.3Ag Alloy under Hot Tension

Dai

Liu

2020

MSF

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The hot deformation behavior and microstructure evolution of Al-3.5Cu-1.0Li-0.4Mg- 0.6Zn-0.3Ag aluminum lithium alloy were investigated by hot tensile tests on Gleeble-1500 thermal simulator at 480-510 °C and strain rates 0.0001-0.1 s-1. The results show that obvious flow steady-state phenomena occur during hot stretching and the main mechanism changes from dynamic recovery to dynamic recrystallization with the increase of temperature and decrease of strain rate. The constitutive equation was calculated using the true stress-strain curve obtained by the hyperbolic sinusoidal pair of deformation activation energy Q and temperature T proposed by Sellars and Tegart. The deformation heat activation energy is 226.783 KJ/mol.

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“…Both the flow instability domain and safe deformation domain can be determined by the processing map. In the flow instability domains, typical microstructural manifestations are adiabatic shear bands formation, flow localization, dynamic strain aging, mechanical twinning, cracking, kinking and flow rotations [15]. From the processing maps in Fig.…”

Section: Resultsmentioning

confidence: 99%

Hot Deformation and Processing Map of C919 Aluminum Alloy

Yang

Zhang

2015

MSF

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The hot deformation behaviors of Aluminum alloy C919 were studied in the present investigation. The hot compression tests for C919 were carried out in the temperature range of 350°C~470°C and strain rates range of 0.001s-1~1s-1 using GLEEBLE-1500 thermal simulate testing machine. Optical microscopy (OM) was used for the microstructure characterization. The experimental results showed that the flow stress of C919 aluminum alloy decreased with increasing temperature and decreasing strain rates and the flow stress curves tended to increase at a strain rate of 1s-1 with increasing strain, while the flow stresses kept with increasing strain at lower strain rate. The alloys were more prone to dynamic recrystallization with decreasing strain rates during hot deformation. The hot compression behavior of C919 aluminum alloy can be described as hyperbolic sine function corrected Arrhenius relation. The processing maps for the alloy were built at a strain of 0.6. The instability deformation domain occurred at temperatures range from 350°C and 380°C and at a strain rate of 0.1-1s-1. Based on the processing maps and microstructure observations, the optimum hot-working parameters were determined to be at a temperature of 470°C in the strain rate range from 0.1-0.01s−1 for the C919 aluminum alloy.

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Processing map for hot working of spray formed and hot isostatically pressed Al–Li alloy (UL40)

Cited by 57 publications

References 29 publications

Strengthening mechanisms, deformation behavior, and anisotropic mechanical properties of Al-Li alloys: A review

Strengthening mechanisms, deformation behavior, and anisotropic mechanical properties of Al-Li alloys: A review

Flow Stress Behavior of Al-3.5Cu-1.0Li-0.4Mg-0.6Zn-0.3Ag Alloy under Hot Tension

Hot Deformation and Processing Map of C919 Aluminum Alloy

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