Cu-Zn-Al is a copper-based shape memory alloy (SMA) that exhibits superelastic and shape-recovery behavior through reversible phase transformations between austenite and martensite crystal structures. This alloy family is valued in applications requiring actuation, vibration damping, and precise mechanical recovery at moderate temperatures, with Cu-Zn-Al offering lower cost and better machinability than Ni-Ti alternatives while accepting trade-offs in repeatability and thermal cycling stability. It operates in a narrow temperature window around room temperature, making it suited to ambient-condition devices but limiting use in high-temperature environments compared to competing SMAs.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Elongation at Break(εf) | 10.00 | - | — | ||
Recovery Strain(ε_rec) | 4.000 | - | — | ||
Ultimate Tensile Strength(σUTS) | 450.0 | MPa | — | ||
Young's Modulus(E) | 72.00 | GPa | notes |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Austenite Finish Temperature (Af)(Af) | 353 | K | — | ||
Martensite Start Temperature (Ms)(Ms) | 323 | K | — | ||
Maximum Service Temperature(Tmax) | 373.2 | K | — | ||
Thermal Conductivity(k) | 120 | W/(m·K) | — | ||
Thermal Hysteresis(ΔT_hyst) | 15.00 | K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 7.640 | kg/m³ | — |