Ni49.8Ti42.2Hf8 shape memory alloy strips production by the twin roll casting technique

The twin roll casting technique has been used for the first time to produce semi-finished Ni49.8Ti42.2Hf8 shape memory alloy thin strips. Some cracks appear on these new products but can be removed by optimization of the operational parameters. The aspect, dimensions and thermodynamical behavior of the strips are studied and interpreted according to the operational parameters and the resulting microstructure, taking into account the complex heat and mass flows during the process