Development of Fe-Ni-Co-Al-based superelastic alloys

Abstract

Fe-based superelastic alloys, which show both superelasticity and high damping capacity, can be divided into four alloy systems based on the characteristics of the martensite transformation that is responsible for these effects, viz., Fe-Pt, Fe-Pd, Fe-Mn-Si, and Fe-Ni-Co. Since 2010, Fe-Ni-Co-Al-based alloys that exhibit a large superelastic effect have attracted widespread attention. In this paper, the characteristics of the phase transformation from austenite ($\gamma$) to martensite ($\alpha \mathrm{’})$ and the effects of the martensite variants in Fe-Ni-Co-Al-based superelastic alloys are summarized. The effects of alloying elements, precipitates and texture on the thermoelastic martensite transformation and the superelastic properties are reviewed. The factors affecting the superelastic effect and recoverable strain along with the related mechanisms are discussed. In addition, research progress on the damping performance, microwire structures, and modeling of Fe-Ni-Co-Al-based superelastic alloys are outlined. Finally, the challenges and future developments of the superelastic effect in Fe-Ni-Co-Al-based alloy are explored.

Keywords:

• Fe-Ni-Co-Al
• shape memory alloys
• thermoelastic martensite
• precipitate
• superelastic effect

Disclosure statement

The authors declare no conflict of interest.

Additional information

Funding

The present work was supported by the National Key R & D Project (2018YFE0115800, 2020YFE0202600), Youth Talent Project of China National Nuclear Corporation (CNNC2019YTEP-HEU01, CNNC2021YTEP-HEU01), the NSFC Funding (52001083, 52171111, U2141207), China Postdoctoral Science Foundation Funded Project (2019T120255), Natural Science Foundation of Heilongjiang (LH2019E030), and Heilongjiang Touyan Innovation Team Program.