Superelastic response and damping capacity of ultrahigh-strength [1 1 1]-oriented NiTiHfPd single crystals

The superelastic behavior of an NiTiHfPd single-crystal shape memory alloy in compression along the [1 1 1] orientation was investigated as a function of temperature. In the range of −30 to 70 °C, a perfect superelastic loop with 4.2% transformation strain was attained. In addition, this material exhibited an ultrahigh yield strength of more than 2500 MPa and an exceptional damping capacity of 44 J cm−3.