Microstructure Evolution in 5083 AI-Mg Alloy Exhibiting Low Temperature Superplasticity at 250°C
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Detail(s)
Original language | English |
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Pages (from-to) | 639-644 |
Journal / Publication | Materials Science Forum |
Volume | 304-306 |
Online published | 23 Feb 1999 |
Publication status | Published - 1999 |
Externally published | Yes |
Conference
Title | 2nd International Conference on Towards Innovation in Superplasticity |
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Location | |
Place | Japan |
City | Kobe |
Period | 21 - 24 September 1998 |
Link(s)
Abstract
The current study developed a simple rolling-type TMT to process the commercial 5083 to exhibit low temperature superplasticity at 250 °C and 1×10-3 s-1, with an optimum tensile elongation to 400%. The TMT processed thin sheet contained (sub)grains measuring 0.5×0.5×0.2 μm. During superplastic straining, the subgrains gradually transformed into well-defined equiaxed grains to ∼1 μm at ε=0.5 and ∼1.5 μm at ε=0.9. At temperatures lower than 300 °C, the grains grew limitedly and maintained LTSP, with failure by cavitation coalescence. The flow stress of the LTSP specimens dropped to nearly one half as compared with the AR non-superplastic samples, and the strain rate sensitivity increased from 0.15-0.2 of the AR specimens to 0.3-0.4 of the LTSP ones. The effects from rolling temperature and rolling reduction ratio on the LTSP characteristics were also examined.
Research Area(s)
- 5083 Alloy, Low Temperature Superplasticity, Microstructure Evolution
Citation Format(s)
Microstructure Evolution in 5083 AI-Mg Alloy Exhibiting Low Temperature Superplasticity at 250°C. / Hsiao, I.C.; Huang, J.C.
In: Materials Science Forum, Vol. 304-306, 1999, p. 639-644.
In: Materials Science Forum, Vol. 304-306, 1999, p. 639-644.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review