Effects of ageing on microstructure and superelastic behavior of [110]-oriented Ni45.3Ti29.7Hf20Pd5 single crystals

E. E. Timofeeva; E. Y. Panchenko; Y. I. Chumlyakov; A. I. Tagiltsev; N. G. Vetoshkina; H. Karaca; A. A. Neiman

doi:10.1016/j.msea.2016.08.008

Effects of ageing on microstructure and superelastic behavior of [110]-oriented Ni_45.3Ti_29.7Hf₂₀Pd₅ single crystals

E. E. Timofeeva, E. Y. Panchenko, Y. I. Chumlyakov, A. I. Tagiltsev, N. G. Vetoshkina, H. Karaca, A. A. Neiman

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

The effects of ageing at 773 K for 3 h on microstructure and superelastic behavior in B2-B19' thermoelastic martensitic transformations of Ni_45.3Ti_29.7Hf₂₀Pd₅ (аt%) single crystals were investigated in this study. Ageing introduced nanoscale H and H′ phase precipitates, which resulted in a decrease of B2-B19' transformation temperatures, a dispersion hardening of the B2 phase and a twofold increase in the superelasticity range (up to ΔТ_SE=200 K) as compared with quenched crystals. In aged single crystals, reversible thermoelastic transformations with an extremely high critical stress level (σ_cr=1500 MPa) and reversible strain up to 1.8% were obtained at elevated temperatures (450 K).

Original language	English
Pages (from-to)	498-503
Number of pages	6
Journal	Materials Science and Engineering: A
Volume	674
DOIs	https://doi.org/10.1016/j.msea.2016.08.008
State	Published - Sep 30 2016

Bibliographical note

Publisher Copyright:
© 2016 Elsevier B.V.

Funding

This work was supported by the Russian Science Foundation (Grant no. 14-29-00012 ).

Funders	Funder number
Russian Science Foundation	14-29-00012

Keywords

Ageing
Hardening
Martensitic transformations
Shape memory
Superelasticity

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1016/j.msea.2016.08.008

Cite this

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title = "Effects of ageing on microstructure and superelastic behavior of [110]-oriented Ni45.3Ti29.7Hf20Pd5 single crystals",

abstract = "The effects of ageing at 773 K for 3 h on microstructure and superelastic behavior in B2-B19' thermoelastic martensitic transformations of Ni45.3Ti29.7Hf20Pd5 (аt\%) single crystals were investigated in this study. Ageing introduced nanoscale H and H′ phase precipitates, which resulted in a decrease of B2-B19' transformation temperatures, a dispersion hardening of the B2 phase and a twofold increase in the superelasticity range (up to ΔТSE=200 K) as compared with quenched crystals. In aged single crystals, reversible thermoelastic transformations with an extremely high critical stress level (σcr=1500 MPa) and reversible strain up to 1.8\% were obtained at elevated temperatures (450 K).",

keywords = "Ageing, Hardening, Martensitic transformations, Shape memory, Superelasticity",

author = "Timofeeva, \{E. E.\} and Panchenko, \{E. Y.\} and Chumlyakov, \{Y. I.\} and Tagiltsev, \{A. I.\} and Vetoshkina, \{N. G.\} and H. Karaca and Neiman, \{A. A.\}",

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year = "2016",

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doi = "10.1016/j.msea.2016.08.008",

language = "English",

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T1 - Effects of ageing on microstructure and superelastic behavior of [110]-oriented Ni45.3Ti29.7Hf20Pd5 single crystals

AU - Timofeeva, E. E.

AU - Panchenko, E. Y.

AU - Chumlyakov, Y. I.

AU - Tagiltsev, A. I.

AU - Vetoshkina, N. G.

AU - Karaca, H.

AU - Neiman, A. A.

PY - 2016/9/30

Y1 - 2016/9/30

N2 - The effects of ageing at 773 K for 3 h on microstructure and superelastic behavior in B2-B19' thermoelastic martensitic transformations of Ni45.3Ti29.7Hf20Pd5 (аt%) single crystals were investigated in this study. Ageing introduced nanoscale H and H′ phase precipitates, which resulted in a decrease of B2-B19' transformation temperatures, a dispersion hardening of the B2 phase and a twofold increase in the superelasticity range (up to ΔТSE=200 K) as compared with quenched crystals. In aged single crystals, reversible thermoelastic transformations with an extremely high critical stress level (σcr=1500 MPa) and reversible strain up to 1.8% were obtained at elevated temperatures (450 K).

AB - The effects of ageing at 773 K for 3 h on microstructure and superelastic behavior in B2-B19' thermoelastic martensitic transformations of Ni45.3Ti29.7Hf20Pd5 (аt%) single crystals were investigated in this study. Ageing introduced nanoscale H and H′ phase precipitates, which resulted in a decrease of B2-B19' transformation temperatures, a dispersion hardening of the B2 phase and a twofold increase in the superelasticity range (up to ΔТSE=200 K) as compared with quenched crystals. In aged single crystals, reversible thermoelastic transformations with an extremely high critical stress level (σcr=1500 MPa) and reversible strain up to 1.8% were obtained at elevated temperatures (450 K).

KW - Ageing

KW - Hardening

KW - Martensitic transformations

KW - Shape memory

KW - Superelasticity

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