Abstract
Abstract Phase-mix, phase transformations and crystallographic texture of amorphous/nanostructure melt-spun ribbons of Ti 2 NiCu were studied using X-ray diffraction and nano-indentation. Their peak two-way shape-memory effect occurs when most of the austenite (cubic, B2) phase has converted to martensite (orthorhombic, B19), but before grain growth takes place. The melt-spinning process imparts strong B2 {1 0 0} texture that is retained as B19 (1 0 0) and (0 1 1) after phase transition during subsequent annealing. Because the phase transformation and texture strongly depend on the annealing process, it should be possible to tailor them for further improving their performance.
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