Microstructure and high strain rate superplasticity of in situ composite synthesised from aluminium and nanoZrO2 particles by powder metallurgy
Source: Materials Science and Technology, Volume 17, Number 2, February 2001 , pp. 187-194(8)
Publisher: Maney Publishing
Abstract:Pure aluminium matrix composites reinforced mainly with a fine needlelike Al3Zr phase were synthesised by the reaction between nanocrystalline ZrO2 particles and pure aluminium using powder metallurgy followed by hot extrusion and hot rolling. After extrusion, the composite fabricated with 5 vol.-%ZrO2 had a strain rate sensitivity (m value) of 0.31 and a total elongation of 156% at 650°C and 1.3×10-1 s-1. The high strain rate superplasticity was improved by hot rolling. After hot rolling, the m value of the composite fabricated with 10%ZrO2 particles was 0.40 and the total elongation was 204% at 640°C and 1.3×10-1 s-1. The superplastic deformation mechanism for the present composites involves grain boundary sliding and interfacial sliding. From this mechanism, the following experimental results can be easily understood: the total elongation increased with temperature, and the strain rate at which maximum total elongation was attained increased with increasing deformation temperature.
Document Type: Regular Paper
Affiliations: 1: School of Materials Science and Engineering, Harbin Institute of Technology, PO Box 433, Harbin 150001, China 2: National Industrial Research Institute of Nagoya, Nagoya 462, Japan 3: Aichi Institute of Technology, Yagusa, Toyota 470–03, Japan
Publication date: 2001-02-01
Authors wishing to cite fast track papers should give the journal name and the article DOI. This will enable reference linking via CrossRef and allow forward and backward citation tracking systems to associate the fast track citation with the final journal reference.Materials Science and Technology is the successor of two previous titles, for which digitised archives are available: Metal Science (Vols. 1—17; 1967—84) and Metals Technology (Vols. 1—11; 1974—84).
- Editorial Board
- Information for Authors
- Subscribe to this Title
- Terms & Conditions
- Online submission site
- ingentaconnect is not responsible for the content or availability of external websites