Superplasticity research

T. G. Nieh, J. Wadsworth, and K. Higashi, "High Strain Rate Superplasticity in Metals and Composites," in Transaction of the Materials Research Society of Japan Vol 16B - Composites, Grain Boundaries and Nanophase Materials, pp. 1027-1032, M. Sakai, M. Kobayashi, T. Suga, R. Watanabe, Y. Ishida, and K. Niihara ed., Elsevier Science, Netherland, (1994). 

Superplasticity. Eutectoid and near eutectoid alloy chemistry research has resulted in alloys exhibiting superplasticity with unusual elongation (>1000%) and fonnability and with 60,000 pounds per square inch (414 megapascals) tensile strength. Three examples of these alloys are 94.5% Al-5% Cu-0.5% Zr, 22% Al-78% Zn and 90% Al, 5% Zn, 5% Ca. 

The application of ceramics has infiltrated almost all fields in the last 20 years, because of their advantages over metals due to their strong ionic or covalent bonding. But it is just this bonding nature of ceramics that directly results in their inherent brittleness and difficulty in machining. In other words, ceramics show hardly any macroscopic plasticity at room temperature or at low temperatures like metals. Hence, superplasticity at room temperature is a research objective for structural ceramics. In recent years, many researches have been carried out to investigate nanophase ceramic composites. 

Ciftcioglu, M., and Mayo, M. X, Processing of nanocrystalline ceramics, in Superplasticity in Metals, Ceramics and Intermetallics Symposium Proceedings (M. X Mayo, M. Kobayashi, X Wadsworth, Eds.), pp. 77-86. Materials Research Society, Pittsburgh (1990). 

Research Center for Superplasticity, Faculty of Engineering, Ibaraki University, 4-12-1 Nakanarusawa, Hitachi, 316-8511, Japan ... 

R. Grimes and R.G. Butler, in International Conference on Superplasticity in Advanced Materials, S. Hori, M. Toki-zane, and N. Furushiro, Ed., (Osaka, Japan), Japan Society for Research in Superplasticity, 1991, P 771... 

Shinoda Y (2012) Mechanisms of superplastic deformation of nanocrystalline silicon carbide ceramics, Army research laboratory, Aberdeen Proving Ground, MD 21005-5066, ARL-CR-702 August 2012 (Approved for public release distribution is unlimited)... 

WAK 91] WAKAl F., KODAMA Y., MURAYAMA N., SAKAGUCHI S., ROUXEL T., SATO S. and NONAMI T., Superplasticity in advanced materials , in Superplasticity of functional ceramics, Ed. Hori S., Tokizane M. and Furushiro N., The Japan Society for Research on Superplasticity, Osaka, Japan, 1991. 

T. G Nieh, C. M. Tomasello, and J. Wadsworth, "Dynamic Grain Growth in Superplastic Y-TZP and AI2O3/YTZ" pp. 343-348 in Materials Research Society Symposium Proceedings, Vol. 196. Materials Research Society, Warrendale, PA, 1990. 

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