Superelasticity of [001]-oriented Fe42·6Ni27.9Co17·2Al9.9Nb2.4 ferrous shape memory alloys

• Published in: Scripta materialia Vol. 120; pp. 54 - 57
• Main Authors: Karaca, H.E., Turabi, A.S., Chumlyakov, Y.I., Kireeva, I., Tobe, H., Basaran, B.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15.07.2016
• Subjects: Iron-based shape memory alloys; Magnetic shape memory alloys; Martensitic transformation; Shape memory effect; Tension-compression asymmetry; Martensitic transformation; Iron-based shape memory alloys; Shape memory effect; Tension-compression asymmetry; Magnetic shape memory alloys
• ISSN: 1359-6462; 1872-8456
• DOI: 10.1016/j.scriptamat.2016.04.008

The shape memory properties of a ferrous single crystalline alloy, FeNiCoAlNb, were investigated along the [100] orientation by superelasticity tests in both tension and compression. Aging was used to form nano-size precipitates to demonstrate and tailor their shape memory properties. After aging at 700°C for 3h, [001]-oriented FeNiCoAlNb shows high compression-tension asymmetry and shape recovery of about 4.5% in tension and 8.8% in compression. The superelastic behavior of [001]-oriented FeNiCoAlNb is weakly temperature dependent due to large transformation strain. FeNiCoAlNb has great potential for temperature independent and large scale actuator applications. [Display omitted]