Shape Memory Alloys: cu_al_ni
Shape memory alloy (SMA) properties — transformation temperatures (As, Af, Ms, Mf), recovery strain, superelastic plateau stress, tensile strength, modulus, fatigue life, and hysteresis for NiTi and copper-based alloys
| alloy family | alloy id | austenite finish C (C) | austenite start C (C) | common name | corrosion resistance | density kg m3 (kg/m3) | elongation at break pct (%) | fatigue life cycles (cycles) | hysteresis width C (C) | martensite finish C (C) | martensite start C (C) | max operating temp C (C) | modulus austenite GPa (GPa) | modulus martensite GPa (GPa) | notes | recovery strain pct (%) | tensile strength MPa (MPa) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| cu_al_ni | cu_13al_4ni_ht | 150 | 130 | Cu-13Al-4Ni (high temp Af~150C) | fair | 7,200 | 4 | 50,000 | 60 | 60 | 90 | 200 | 75 | 65 | Higher Al content raises transformation temp; limited ductility | 3 | 550 |
| cu_al_ni | cu_14al_3ni_sc | 160 | 145 | Cu-14Al-3Ni Single Crystal | good | 7,100 | 15 | 1,000,000 | 50 | 90 | 110 | 200 | 90 | 70 | Single crystal eliminates grain boundary fracture; excellent recovery | 9 | 900 |
| cu_al_ni | cu_14al_4ni | 70 | 55 | Cu-14Al-4Ni (low temp) | fair | 7,200 | 5 | 100,000 | 40 | -5 | 30 | 150 | 80 | 70 | Cu83Al14Ni3 wt%; brittle due to grain boundaries; high-temp SMA; polycrystalline prone to fracture | 4 | 600 |
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