Designing superplastic forming process of a developmental AA5456 using pneumatic bulge test experiments and FE-simulation

Kappes, J.; Liewald, Mathias; Jupp, Simon M.; Pirchl, Christoph; Herstelle, Roman

doi:10.1007/s11740-012-0363-0

Cited by 8 publications

(1 citation statement)

References 31 publications

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“…This is the rea- Disregarding the premature failure and looking at the cone peak, where maximum strain would be expected, a peak strain of 75 % was recorded and a cone height of 41 mm was achieved in a cycle time of 31 minutes. This is comparable to testing of an AA7020 alloy tested on the same equipment and AA5456 investigated elsewhere [18,19]. The suggestion from this being that the WE43 material is well suited to that of a superplastic forming or quasi-superplastic forming process such as quick plastic forming, where higher strain rates are employed than typical superplastic forming processes.…”

Section: Gas Bulge Testingsupporting

confidence: 68%

Comparison of superplastic forming abilities of as‐cast AZ91 magnesium alloy prepared by twin roll casting and WE43 magnesium alloy

Taylor

Janík

Grimes

et al. 2018

Materialwissenschaft Werkst

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This paper describes and compares the superplastic behaviour and microstructural evolution of twin roll cast AZ91 and WE43 rolled sheet alloys. Tests were carried out in uniaxial tension on both alloys across a range of temperatures (300 8C-525 8C) and strain rates (1·10 -4 s -1 -1·10 -1 s -1 ). In the case of WE43 gas bulge testing was employed at 400 8C and 0.6 MPa to offer a better analogy to superplastic forming than uniaxial tensile testing. Elongations of over 400 % were observed within WE43 when tested at 450 8C and 1·10 -3 s -1 strain rate, and over 200 % within AZ91 when tested at 350 8C and 1·10 -3 s -1 strain rate. A peak cone height of 41 mm was achieved with WE43 at a temperature of 400 8C and pressure of 0.6 MPa. Electron back scattered detection technique was employed to analyse the microstructural evolution of the two alloys during the forming process. Both WE43 and AZ91 were observed to undergo dynamic recrystallization during elevated temperature tensile testing and failed at low strain rates mainly by means of coalescence of cavitation, in the case of AZ91 at high strain rates cracking of Al 12 Mg 17 intermetallic particles was the dominating failure mechanism. Both alloys were seen to achieve good levels of superplastic ductility over 200 % elongation, which would be industrially useful in niche vehicle and aerospace manufacturing.Keywords: Superplastic forming / electron back scattered detection / gas bulge testing / microstructure / AZ91 / WE43 Schlü sselwö rter: Superplastisches Umformen / Elektronenrü ckstreubeugung / Gas-Bulgetest / Gefü ge / AZ91 / WE 43

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Section: Gas Bulge Testingsupporting

confidence: 68%

Comparison of superplastic forming abilities of as‐cast AZ91 magnesium alloy prepared by twin roll casting and WE43 magnesium alloy

Taylor

Janík

Grimes

et al. 2018

Materialwissenschaft Werkst

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FE Analysis of Superplastic Forming Complex Shapes in Aluminum-Coated Magnesium Alloys

Kandasamy¹

2020

Lecture Notes in Mechanical Engineering

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Modelling the superplastic behaviour of the Ti6Al4V-ELI by means of a numerical/experimental approach

Sorgente

Palumbo

Piccininni

et al. 2016

Int J Adv Manuf Technol

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In the present work, the superplastic behaviour of a Ti6Al4V-ELI titanium alloy at the temperature of 850 °C is assessed combining experiments and numerical simulations managed by a genetic algorithm-based optimization loop. The experiments consisted of free inflation tests characterized by either a constant gas pressure or several pressure jumps during the same test. Dome height evolutions from tests setting a constant gas pressure were used to evaluate the parameters of the classical strain rate power law material model using an analytical approach from literature. An alternative set of material constants was then evaluated using the inverse analysis based on a genetic algorithm coupled to dome height data from jump pressure tests. Numerical results, in terms of thickness distribution and dome height evolution, obtained from simulations implementing material constants from the inverse analysis fit experimental data in a wider range of strain rates than the ones implementing material constants from the analytical approach

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Designing superplastic forming process of a developmental AA5456 using pneumatic bulge test experiments and FE-simulation

Cited by 8 publications

References 31 publications

Comparison of superplastic forming abilities of as‐cast AZ91 magnesium alloy prepared by twin roll casting and WE43 magnesium alloy

Comparison of superplastic forming abilities of as‐cast AZ91 magnesium alloy prepared by twin roll casting and WE43 magnesium alloy

FE Analysis of Superplastic Forming Complex Shapes in Aluminum-Coated Magnesium Alloys

Modelling the superplastic behaviour of the Ti6Al4V-ELI by means of a numerical/experimental approach

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