Development of superplastic properties in quasi single phase alloys

R. Grimes, R.J. Dashwood, A. Dorban, M. Jackson, S. Katsas, I. Pong, G. Todd

Research output: Chapter in Book/Report/Conference proceedingConference proceeding

8 Citations (Scopus)

Abstract

The early view of superplasticity was that it was a phenomenon that could only be exhibited by fine grained, two phase alloys. This effectively ruled out most alloys that possessed attractive service properties. The first material to demonstrate good superplastic properties from a virtually single phase microstructure was the Al-6%Cu-0.5%Zr, AA 2004 but this was followed by superplastic versions of AA7475, AA8090 and AA5083. Superplasticity was also demonstrated in magnesium based alloys at an early stage. More recently different grain control additions, such as scandium or erbium have been investigated and it has also been demonstrated that, in certain circumstances, aluminium simply with the addition of a grain controlling element can exhibit good superplastic behaviour. While conventional wisdom teaches that large fabricating strains are required to confer good superplastic properties in the sheet product, recent results with both aluminium and magnesium alloys cast doubt on this belief. Although, for many years, strip casting has appeared to provide an attractive semi-fabricating route for superplastic sheet problems with centre line segregation in alloys with a wide freezing range have precluded its use. It has been demonstrated that recent developments in strip casting enable production of alloys with as wide a freezing range as AA5182 to be cast with a fine, equiaxed grain structure across the strip thickness. The paper will review the state of these various developments and their implications for the manufacture of superplastic sheet materials.
Original languageEnglish
Title of host publicationSuperplasticity in Advanced Materials - ICSAM 2006
EditorsK. F. Zhang
PublisherTrans Tech Publications
Pages357-364
Number of pages8
Volume551-552
ISBN (Electronic)978-3-908453-62-8, 978-3-03813-112-0
ISBN (Print)978-0-87849-435-4
Publication statusPublished - 2007

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superplasticity
strip
freezing
casts
scandium
magnesium alloys
aluminum alloys
erbium
magnesium
routes
aluminum
microstructure
products

Keywords

  • A13Zr
  • Aluminium alloys
  • Dispersoid distribution
  • Magnesium alloys
  • Particulate casting
  • Superplastic forming
  • Twin roll casting

Cite this

Grimes, R., Dashwood, R. J., Dorban, A., Jackson, M., Katsas, S., Pong, I., & Todd, G. (2007). Development of superplastic properties in quasi single phase alloys. In K. F. Zhang (Ed.), Superplasticity in Advanced Materials - ICSAM 2006 (Vol. 551-552, pp. 357-364). Trans Tech Publications.

Development of superplastic properties in quasi single phase alloys. / Grimes, R.; Dashwood, R.J.; Dorban, A.; Jackson, M.; Katsas, S.; Pong, I.; Todd, G.

Superplasticity in Advanced Materials - ICSAM 2006. ed. / K. F. Zhang. Vol. 551-552 Trans Tech Publications, 2007. p. 357-364.

Research output: Chapter in Book/Report/Conference proceedingConference proceeding

Grimes, R, Dashwood, RJ, Dorban, A, Jackson, M, Katsas, S, Pong, I & Todd, G 2007, Development of superplastic properties in quasi single phase alloys. in KF Zhang (ed.), Superplasticity in Advanced Materials - ICSAM 2006. vol. 551-552, Trans Tech Publications, pp. 357-364.
Grimes R, Dashwood RJ, Dorban A, Jackson M, Katsas S, Pong I et al. Development of superplastic properties in quasi single phase alloys. In Zhang KF, editor, Superplasticity in Advanced Materials - ICSAM 2006. Vol. 551-552. Trans Tech Publications. 2007. p. 357-364
Grimes, R. ; Dashwood, R.J. ; Dorban, A. ; Jackson, M. ; Katsas, S. ; Pong, I. ; Todd, G. / Development of superplastic properties in quasi single phase alloys. Superplasticity in Advanced Materials - ICSAM 2006. editor / K. F. Zhang. Vol. 551-552 Trans Tech Publications, 2007. pp. 357-364
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