Superplastic behavior in a commercial 5083 aluminum alloy
- Pacific Northwest Lab., Richland, WA (United States)
- Washington State Univ., Pullman, WA (United States). Dept. of Mechanical and Materials Engineering
When considering the forming and post-forming properties required of a superplastic material, attractive candidates are commercial Al-Mg-Mn weldable alloys such as AA5083. There have been several investigations of hot deformation of 5083-type alloys in the literature. Only two studies evaluated commercial-purity 5083 and they achieved tensile elongations of 150% and 200%. Alloy modification has produced improved behavior in three 5083-type alloys developed specifically for SPF. Two were deemed high-purity 5083 (low Fe and Si) and achieved elongations of 450% and 630%. Engineering strains up to 700% were measured by Watanabe et al. in a 5083-based alloy with the addition of 0.6% Cu as a grain refiner. These results suggest that alloy modifications such as reduced Fe and Si contents or Cu additions may be required to improve superplastic response. Unfortunately, specific SPF-grade 5083 alloys are substantially more expensive than the commercial grade, and the addition of Cu decreases the corrosion resistance of the base material. The purpose of this work is to examine the effect of prior degrees of cold work on the SPF behavior of a standard-grade 5083 alloy. Superplastic behavior of this material at 510[degree]C is assessed and compared to published results for the SPF-grade alloys.
- DOE Contract Number:
- AC06-76RL01830; FG06-89ER75522
- OSTI ID:
- 5227799
- Journal Information:
- Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 30:5; ISSN 0956-716X; ISSN SCRMEX
- Country of Publication:
- United States
- Language:
- English
Similar Records
Development of low temperature superplasticity in commercial 5083 Al-Mg alloys
Strain rate insensitive plasticity in aluminum alloy 5083