Superplastic behavior of an Al–Mg–Li alloy

Ye, Lingying; Zhang, Xinming; Zheng, Dewen; Liu, Shengdan; Tang, Jianguo

doi:10.1016/j.jallcom.2009.07.148

Cited by 23 publications

(15 citation statements)

References 18 publications

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“…Nevertheless, constant or decrease in stress after attaining peak value is due to dynamic softening arising from a recrystallization process. Moreover, flow stress increases with increasing strain rate because of lack of time for diffusion and accommodation process [78,81]. Charit et al [82] observed a monotonic increase in cavity volume fraction with an increase in strain rate as displayed in Figure 5b.…”

Section: Effect Of Strain Rate On the Superplasticity Of Al Alloysmentioning

confidence: 95%

“…In general, single phase materials do not exhibit superplastic behavior because grain grows rapidly at high temperatures. However, the addition of trace elements like Sc, Zr, Mg, Li, Cu [81] form nanoscale coherent Al 3 Zr, Al 3 Sc, Al 3 Sc x Zr 1-x precipitates at grain boundaries and within the grain interiors to resist grain growth during recrystallization at elevated temperature. Thermally stable second phase particles stabilize grain boundaries, subgrain boundaries, and dislocation by the Zener pinning effect [111,112].…”

Section: Effect Of Addition Of Trace Elements In Alloys On the Superpmentioning

confidence: 99%

“…(a) Effect of strain rates on true strain-true stress curves, reproduced from[81], with permission from Elsevier, 2009. (b) Variation of cavity volume fraction with strain rate, reproduced from[82], with permission from Cambridge University Press, 2004.…”

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confidence: 99%

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Recent Development of Superplasticity in Aluminum Alloys: A Review

Bhatta

Pesin

Zhilyaev

et al. 2020

Metals

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Aluminum alloys can be used in the fabrication of intricate geometry and curved parts for a wide range of uses in aerospace and automotive sectors, where high stiffness and low weight are necessitated. This paper outlines a review of various research investigations on the superplastic behavior of aluminum alloys that have taken place mainly over the past two decades. The influencing factors on aluminum alloys superplasticity, such as initial grain size, deformation temperature, strain rate, microstructure refinement techniques, and addition of trace elements in aluminum alloys, are analyzed here. Since grain boundary sliding is one of the dominant features of aluminum alloys superplasticity, its deformation mechanism and the corresponding value of activation energy are included as a part of discussion. Dislocation motion, diffusion in grains, and near-grain boundary regions being major features of superplasticity, are discussed as important issues. Moreover, the paper also discusses the corresponding values of grain size exponent, stress exponent, solute drag creep and power law creep. Constitutive equations, which are essential for commercial applications and play a vital role in predicting and analyzing the superplastic behavior, are also reviewed here.

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Section: Effect Of Strain Rate On the Superplasticity Of Al Alloysmentioning

confidence: 95%

Section: Effect Of Addition Of Trace Elements In Alloys On the Superpmentioning

confidence: 99%

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Recent Development of Superplasticity in Aluminum Alloys: A Review

Bhatta

Pesin

Zhilyaev

et al. 2020

Metals

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“…Interestingly, after the initial deformation, the CL showed higher m values than the NL. Increased grain size after deformation may account for the decrease in the m value of the NL [18]. In the CL, it appears that the continuous dynamic recrystallisation (CDRX) of the coarse microstructure (TMAZ/HAZ constituent) was the primary reason for the constant m value.…”

Section: Discussionmentioning

confidence: 97%

Effect of microstructural inhomogeneity on superplastic behaviour of multipass friction stir processed aluminium alloy

Pradeep

Pancholi

2013

Materials Science and Engineering: A

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“…erefore, thermal-mechanical processing (TMP) [41][42][43], which is mainly based on the principles of static recrystallisation [44][45][46][47] and dynamic recrystallisation [48,49], is also an important way to develop superplasticity of Al alloys.…”

Section: Superplastic Formability Of Almentioning

confidence: 99%

A Review on Superplastic Formation Behavior of Al Alloys

Wang

et al. 2018

Advances in Materials Science and Engineering

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Superplastic formation technology is considered to be an effective and promising method to conquer formation difficulties of Al alloys, especially thin-walled or complex structure. In this paper, fundamentals of superplastic deformation of Al alloys are summarized and the superplastic deformation behaviors of main kinds of Al alloys are summarized and compared, including Al-Mg alloys, Al-Li alloys, and Al-Zn-Mg alloys as well as aluminum matrix composites. Then, the superplastic deformation mechanism for different Al alloys is thoroughly discussed. Last but not the least, the factors affecting the superplastic deformation process are fully analyzed.

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Superplastic behavior of an Al–Mg–Li alloy

Cited by 23 publications

References 18 publications

Recent Development of Superplasticity in Aluminum Alloys: A Review

Recent Development of Superplasticity in Aluminum Alloys: A Review

Effect of microstructural inhomogeneity on superplastic behaviour of multipass friction stir processed aluminium alloy

A Review on Superplastic Formation Behavior of Al Alloys

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