| The effect of Mn and Ti on the mechanical properties, the transformation temperature and the shape memory effect of a Cu-Al-Ni alloy have been studied . Addition of 0.35∼0.89wt% Ti and/or 1.67∼1.81wt% Mn reduced gram size of the alloy by a factor of 2, to 50∼70㎛. The fracture stress and strain of the alloy with Ti and/or Mn were 2 times as great as those of the alloy without addition. More Ti beyond solubility limit in the alloy have not a great effect on mechanical properties, shape memory effect and transformation temperature with aging time at 200 ℃. In hyper eutectic Cu-Al-Ni alloy, treansformation temperature is increased slowly without decrese in shape memory affect with aging time at 200℃. In hypo eutectic alloy, on the other hand, transformation temperature is decreased with decrease in shape memory effect after aging time of about 3 ×10＾5 sec at 200℃. |
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