J. Phys. IV France
Volume 112, October 2003
Page(s) 1079 - 1082

J. Phys. IV France
112 (2003) 1079
DOI: 10.1051/jp4:20031069

High temperature copper-based shape memory alloys with primary particles

J. Lelatko and H. Morawiec

Institute of Physic and Chemistry of Metals, University of Silesia, Bankowa 12, 40007 Katowice, Poland

In order to lower the transition temperatures and increase the resistivity against thermal decomposition of the Cu-Al-Nb alloys, the effect of Ni, Co and Cr addition on this behaviour was studied The fourth element in the ternary alloy changes the chemical composition of the matrix and the particles of the Nb (Cu, Al) 2 phase and decreases the plasticity of the quateniary alloys. To explain this behaviour the nano-indentation measurements have been carried out and changes ofthe elastic modulusand nino-hardness across the interface have been evaluated.

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