Power-law creep in near-equiatomic nickel–titanium alloys

The compressive creep behavior of nickel-rich B2–NiTi (with 50–140 μm grain size) was studied over the stress range 3–11 MPa and the temperature range 950–1100 °C. The stress exponent (n = 2.7) and activation energy (Q = 155 kJ mol−1) are compared with a literature review of NiTi creep studies performed over lower temperature and/or higher stresses. Possible explanations for discrepancies between studies are discussed.