Microstructure and superplastic properties in an ECAE AI-4MgO. SSc alloy processed at elevated temperatures
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) | 109-114 |
Journal / Publication | Materials Science Forum |
Volume | 304-306 |
Publication status | Published - 1999 |
Externally published | Yes |
Link(s)
Abstract
Equal-channel-angular-cxtrusion(ECAE) was conducted to an Al-4Mg-0. 5Sc alloy at two elevated temperatures of 473 and 673 K. The effect of processing temperature during heavily straining was investigated. Microstructural examinations revealed the formation of fine-graincd(∼ 0. 5 ;<m) structure at a low operating temperature of 473K, whereas a coarse-grain(∼ 25 ;<m) was formed at 673 K. The material processed at 473 K exhibited the lower flow stress with higher ductility and high strain rate sensitivity of 0. 5 indicating the dominant deformation mechanism was grain boundary sliding. Finer grain structure exhibited the high-strain-rate superplasticity can be obtained at the lower processing temperature. The results indicate that the operating temperature has highly influenced the ECAE process. © 1999 Trans Tech Publications,.
Research Area(s)
- Equal-Channel-Angular-Extrusion, Grain Structure, M-Value, Subgrain structure, Thermomechanical Process, Uniform Deformation
Bibliographic Note
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Citation Format(s)
Microstructure and superplastic properties in an ECAE AI-4MgO. SSc alloy processed at elevated temperatures. / Mukai, T.; Nieh, T. G.; Watanabe, H. et al.
In: Materials Science Forum, Vol. 304-306, 1999, p. 109-114.
In: Materials Science Forum, Vol. 304-306, 1999, p. 109-114.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review