Aerospace series. Aluminium alloy AL-P8090-O2. Sheet for superplastic forming (SPF). 0,8 mm ≤ a ≤ 6 mm

2015 ◽  
Keyword(s):  
Aluminium Alloy ◽  
Superplastic Forming

scholarly journals Prediction of superplastic forming of 7475 aluminium alloy sheets

2019 ◽  
Vol 576 ◽  
pp. 012029
Author(s):  
J Yang ◽  
E Giraud ◽  
P Dal Santo ◽  
S Boude ◽  
J-L Lebrun
Keyword(s):  
Aluminium Alloy ◽  
Superplastic Forming

Chronicling the Development of a High Strength 5xxx-Based Superplastic Aluminium Alloy

2016 ◽  
Vol 838-839 ◽  
pp. 208-213
Author(s):  
Simon Peter Miller-Jupp
Keyword(s):  
Heat Treatment ◽  
Aluminium Alloy ◽  
Automotive Industry ◽  
Aluminium Alloys ◽  
Superplastic Forming ◽  
High Strength ◽  
Lessons Learned ◽  
Type Alloy ◽  
Strength Alloy ◽  
Almost All

In recent years there has been a largely unspoken demand for a high strength, non-heat treatable aluminium alloy for superplastic forming applications. This is particularly true for the automotive industry since the high strength, superplastic aluminium alloys, such as AA7475, are both too time consuming (in forming and heat treatment) and too expensive. Compound this with the expense of corrosion protection and almost all aluminium alloys except for AA5083 fall by the wayside for the automobile industry.However, the need for a higher strength alloy has remained. To achieve this Hydro has systematically investigated the basis behind the superplastic forming of AA5083. On this basis a new high strength 5xxx alloy was extrapolated. The resulting alloy was then characterised and benchmarked against the existing SPF alloy, AA5083. The new alloy, an AA5456-type alloy demonstrated a higher strength than AA5083 while improving the formability and rate of forming. This paper will discuss some of the lessons learned during the development of this alloy.

scholarly journals Effect of Friction and Back Pressure on the Formability of Superplastically Formed Aluminium Alloy Sheet

2011 ◽  
Vol 473 ◽  
pp. 532-539 ◽  
Author(s):  
Paul Wood ◽  
Muhammad Jawad Qarni ◽  
Andrzej Rosochowski
Keyword(s):  
Aluminium Alloy ◽  
Coulomb Friction ◽  
Volume Fraction ◽  
Superplastic Forming ◽  
Element Model ◽  
Alloy Sheet ◽  
Void Volume Fraction ◽  
Back Pressure ◽  
Thickness Strain ◽  
Growth Of Voids

This paper examines the effect of friction and back pressure on the formability of superplastically formed aluminium alloy AA7475 sheet at the temperature of 517 °C. Several experiments with lubrication and back pressure are performed using a simple box shape tool cavity. The coefficient of Coulomb friction between the formed sheet and tool has been determined indirectly using a finite element model to simulate superplastic forming of the box shape. Typical values determined for all lubricant conditions tested are in the range 0.1 < μ < 0.2. The void growth with strain was determined directly from measurements as a function of back pressure. The results show the application of back pressure at 1 MPa reduces the growth of voids from 7% to 0.3% void volume fraction at a logarithmic thickness strain of 0.65. This paper reports back pressure has a significantly greater role than friction in enhancing the formability of the alloy.

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