Development of low temperature superplasticity in commercial 5083 Al-Mg alloys
- National Sun Yat-Sen Univ., Kaohsiung (Taiwan, Province of China). Inst. of Materials Science and Engineering
Superplastic forming has been one of the forming techniques for aircraft industry. In developing superplastic aircraft-used aluminum alloys, two successful means have been applied. One was to modify the alloys by adding extra amounts of particle-forming elements, such as the case of Al-Cu base Supral 150 with 0.5 wt% of Zr added (Al-6wt%Cu-0.5%Zr). The other was to process the commercial alloys by a series of thermomechanical treatments (TMTs), such as the efforts made for the Al-Zn-Mg base 7075 and Al-Li base 8090 alloys. There have been numerous efforts in processing aluminum materials to exhibit high rate superplasticity (HRSP) and/or low temperature superplasticity (LTSP). Based on the current development situation, this study is intended to process the low-priced commercial 5083 alloys using simple TMTs so as to develop LTSP at temperatures below 300 C and with superplastic elongations in excess of 200%.
- OSTI ID:
- 335282
- Journal Information:
- Scripta Materialia, Vol. 40, Issue 6; Other Information: PBD: 19 Feb 1999
- Country of Publication:
- United States
- Language:
- English
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