TY - JOUR

T1 - Influence of the Cu and Hf Concentrations on Martensitic Transformation, Mechanical and Functional Behaviour of the Ti-Hf-Ni-Cu Shape Memory Alloys

AU - Беляев, Сергей Павлович

AU - Реснина, Наталья Николаевна

AU - Базлов, Андрей Игоревич

AU - Сибирев, Алексей Владимирович

AU - Поникарова, Ирина Викторовна

AU - Бикбаев, Рашид Менналиевич

AU - Трофимова, Марина Евгеньевна

AU - Иванов, Алексей Максимович

AU - Калганов, Владимир Дмитриевич

PY - 2025/5/21

Y1 - 2025/5/21

N2 - The influence of Cu and Hf concentrations on structure, martensitic transformation, mechanical and functional behaviour was studied in Ti49,2Hf1Ni49,8-xCux and Ti40,7Hf9,5Ni49,8-xCux (x = 1, 5, or 10 at. %) alloys. The temperatures and hysteresis of the martensitic transformation increased on a rise in Hf content and decreased on an increase in Cu concentration. An increase in Hf concentration suppressed the B19 phase formation, while a rise in Cu content promoted the B19 phase formation. An increase in Hf and Cu concentration led to the solid solution hardening that increased the strength and the yield limit for dislocation slip. The strain up failure increased on a rise in Cu concentrations. The variation in Hf and Cu concentrations did not affect the recoverable strain, which value was close to 5.3 ± 0.5% on cooling and heating under 200 MPa, while the irreversible strain decreased on a rise in Hf and Cu content.

AB - The influence of Cu and Hf concentrations on structure, martensitic transformation, mechanical and functional behaviour was studied in Ti49,2Hf1Ni49,8-xCux and Ti40,7Hf9,5Ni49,8-xCux (x = 1, 5, or 10 at. %) alloys. The temperatures and hysteresis of the martensitic transformation increased on a rise in Hf content and decreased on an increase in Cu concentration. An increase in Hf concentration suppressed the B19 phase formation, while a rise in Cu content promoted the B19 phase formation. An increase in Hf and Cu concentration led to the solid solution hardening that increased the strength and the yield limit for dislocation slip. The strain up failure increased on a rise in Cu concentrations. The variation in Hf and Cu concentrations did not affect the recoverable strain, which value was close to 5.3 ± 0.5% on cooling and heating under 200 MPa, while the irreversible strain decreased on a rise in Hf and Cu content.

KW - Martensitic transformations

KW - Multi-component alloys

KW - Shape memory alloys

KW - solid solution hardening

KW - NiTi-based alloys

KW - Martensitic transformations

KW - Multi-component alloys

KW - NiTi-based alloys

KW - Shape memory alloys

KW - Solid solution hardening

UR - https://www.mendeley.com/catalogue/39df8385-ab5d-31e6-b567-44f4110bb92f/

U2 - 10.1007/s12666-025-03619-6

DO - 10.1007/s12666-025-03619-6

M3 - Article

VL - 78

JO - Transactions of the Indian Institute of Metals

JF - Transactions of the Indian Institute of Metals

SN - 0972-2815

IS - 6

M1 - 138

ER -