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Superplastic behaviour of an experimental 18Cr-11Mn-2Ni stainless steel was studied at different temperatures and strain rates of 1.0 E-4 and 1.0 E-3 per second. This steel exhibits superplasticity at temperatures between 850 and 1000 C. At the optimum temperature of 950 C and strain rate of 1.0 E-4, the strain rate sensitivity index was 0.38. Elongations higher than 41.5% were achieved. Cavitation was introduced as a result of thermomechanical treatment and superplastic deformation. The extent of cavitation increased with increasing strain and deformation temperature.

Additional information

Authors: FARAG M M, American University in Cairo (EG);PIATTI G, JRC Ispra Estab. (IT)
Bibliographic Reference: Paper presented: International Conference on Evolution of Advanced Materials, Milano (IT), May 31-June 2, 1989
Availability: Available from (1) as Paper EN 34699 ORA
Record Number: 198910571 / Last updated on: 1994-12-01
Original language: en
Available languages: en