Reversible reorientation of martensite variants in stress-induced martensite aged Co₃₅Ni₃₅Al₃₀ single crystals

The paper reports the temperature dependence of the reversible reorientation of martensite variants during loading/unloading along the [001](B2)||[001](L10)-direction in compression in stress-induced martensite (SIM) aged at 423 K for 0.5 h under a compressive stress of 500 MPa applied along the [110](B2)||[100](L10)-direction Co35Ni35Al30 single crystals. A wide temperature range of reversible strain from 203 K to 413 K (210 K) is observed due to the stabilisation of the tetragonal L1(0)-martensite variant V1 ([001](B2)||[001](L10)) during SIM-aging in these single crystals. The reversible strain in the range of 157 K (203 KA(f)=360 K occurred due to the stress-induced B2-L1(0)(V2/V3) martensitic transformation (MT). Rubber-like behaviour develops in the range of 52 K (203 KMore