An improvement of the mechanical properties of powder metallurgically produced NiTi shape memory alloys was attained by reducing the impurity contents of oxygen and carbon. Elongation at fracture was increased to 16.5 % for Hot Isostatically Pressed (HIP), as well as for net‐shape samples produced by Metal Injection Moulding (MIM) with plastic deformation before fracture. Furthermore, an enlargement of the utilisable strain of the shape memory effect itself was detected.
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Mentz et al. (2006) studied this question.
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