Influence of particles on the functional properties of single crystals of high-strength ferromagnetic alloys

International Scientific Conference of Young Scientists: Advanced Materials in Construction and Engineering

材料科学;土木建筑工程;工业技术

Kretinina, I.V.^1 ; Kuts, O.A.^1 ; Kuksgauzen, D.A.^2 ; Poklonov, V.V.^1 ; Pobedennaya, Z.V.^2 ; Platonova, Yu N.^3

National Research Tomsk State University, Department of Metal Physics, Tomsk

634050, Russia^1

National Research Tomsk State University, Siberian Physical-Technical Institute, Tomsk

634050, Russia^2

National Research Tomsk Polytechnic University, Department of General Physics, Physical-Technical Institute of the, Tomsk

634050, Russia^3

关键词: Characteristic temperature;    Chemical compositions;    Ferromagnetic alloys;    Functional properties;    High temperature;    High temperature phase;    Stress hysteresis;    Wide temperature ranges;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/71/1/012061/pdf
DOI  :  10.1088/1757-899X/71/1/012061

来源: IOP

【 摘 要 】

Single crystals of the ordered ferromagnetic Co49Ni21Ga30(at.%) alloy with B2-L10martensitic transformation and of the disordered iron-based Fe41Ni28Co17Al11.5X2.5(X=Ta, Ti) (at.%) alloys, which undergo thermoelastic γ-a' martensitic transformations, were studied in terms of the influence of chemical composition, size and volume fraction of the dispersed γ'- phase particles on functional properties-shape memory effect and superelasticity. Single crystals of Co49Ni21Ga30alloy showed that the precipitation of nanometric γ'-phase particles changes the martensitic transformation characteristic temperature, reduces the value of the shape memory effect and superelasticity, increases thermal and stress hysteresis, and leads to hardening of the high temperature phase, which promotes superelasticity at a wide temperature range and at high temperatures at T>373K compared with the crystals without particles. Single crystals of FeNiCoAlX (X=Ta, Ti) alloys have experimentally demonstrated that the precipitation of ordered γ'-phase particles at a size of d=5-10 nm during aging at T=973 K, 3 h, leads to the occurrence of the shape memory effect and superelasticity.