The Structure and Mechanical Properties
of the Aging Shape-Memory Ti49Ni51 Alloy
after Thermomechanical Treatment

N. N. Kuranova; Куранова Н. Н.; V. V. Makarov; Макаров В. В.; V. G. Pushin; Пушин В. Г.; N. A. Popov; Попов Н. А.

doi:10.31857/S0015323022601246

The Structure and Mechanical Properties of the Aging Shape-Memory Ti49Ni51 Alloy after Thermomechanical Treatment

Authors: Kuranova N.N.¹^,2, Makarov V.V.¹, Pushin V.G.¹^,2, Popov N.A.¹^,2
Affiliations:
1. Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
2. Ural Federal University Named after the First President of Russia B.N. Yeltsin
Issue: Vol 124, No 2 (2023)
Pages: 239-247
Section: СТРУКТУРА, ФАЗОВЫЕ ПРЕВРАЩЕНИЯ И ДИФФУЗИЯ
URL: https://rjonco.com/0015-3230/article/view/662866
DOI: https://doi.org/10.31857/S0015323022601246
EDN: https://elibrary.ru/HKJBLY
ID: 662866

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Abstract

The effect of thermomechanical treatment on the structure and phase transitions of the aging shape-memory Ti–51 at % Ni alloy has been studied. Mechanical tensile tests were performed in combina-tion with optical and electron microscopic and X-ray diffraction studies. An ultrafine grained (UFG) struc-ture was created in the alloy by multipass-rolling plastic deformation and further annealing. It was established for the alloy to have a high level of mechanical properties (ultimate tensile strength up to 1550 MPa at a rela-tive elongation of more than 20%) owing to a highly disperse phase of precipitation with the formation of an UFG structure due to recrystallization.

Keywords

shape-memory alloys, aging, plastic deformation, martensitic transformation, mechanical properties

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