Mechanical and Thermomechanical Characteristics of the Ni50Ti47.5Hf2.5 Alloy with a High-Temperature Shape Memory Effect
The properties of the Ni 50 Ti 47.5 Hf 2.5 alloy with a high-temperature shape memory effect have been comprehensively studied on samples made from a 2.34-mm-thick strip in the initial state and after high-temperature annealing in vacuum. Data on the elemental and phase compositions and structural s...
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Published in | Inorganic materials : applied research Vol. 15; no. 1; pp. 54 - 62 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Moscow
Pleiades Publishing
01.02.2024
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | The properties of the Ni
50
Ti
47.5
Hf
2.5
alloy with a high-temperature shape memory effect have been comprehensively studied on samples made from a 2.34-mm-thick strip in the initial state and after high-temperature annealing in vacuum. Data on the elemental and phase compositions and structural state have been obtained. The results of investigations of the phase transformation temperatures and the mechanical and thermomechanical characteristics of the alloy are reported. Using annealing and selecting the strain-inducing conditions, the shape recovery temperatures
A
s
SME
= 137°C and
A
f
SME
= 150°C have been determined. These values are acceptable for creating the required depressurization device. The maximum ε
SME
and η
SME
values have been found to be 3.4 and 43%, respectively. These are not very large values for creating an efficient depressurization device for nuclear power plants. The desired displacement values in such a device can be obtained by optimizing the geometry of a thermosensitive element. |
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ISSN: | 2075-1133 2075-115X |
DOI: | 10.1134/S207511332401026X |