High-temperature superelasticity of Ni50.6Ti24.4Hf25.0 shape memory alloy

Luca Patriarca; Huseyin Sehitoglu

doi:10.1016/j.scriptamat.2015.01.005

High-temperature superelasticity of Ni_50.6Ti_24.4Hf_25.0 shape memory alloy

Luca Patriarca, Huseyin Sehitoglu

Mechanical Science and Engineering

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

Abstract

Changes in transformation temperatures and high-temperature mechanical behavior of the new Ni_50.6Ti_34.4Hf_25.0 alloy were determined after selected aging treatments. Differential scanning calorimetry was used to compare the homogenized, solution-treated and aged specimens for a wide combination of aging temperatures and times. Isothermal deformation experiments were conducted measuring reversible transformation strains with digital image correlation. Extraordinary superelasticity was found at test temperatures up to 300 °C for the specimen aged at 500 °C for 4 h.

Original language	English (US)
Pages (from-to)	12-15
Number of pages	4
Journal	Scripta Materialia
Volume	101
DOIs	https://doi.org/10.1016/j.scriptamat.2015.01.005
State	Published - May 1 2015

Keywords

Differential scanning calorimetry
Digital image correlation
Pseudoelasticity
Shape memory

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

Online availability

10.1016/j.scriptamat.2015.01.005

Library availability

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Cite this

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title = "High-temperature superelasticity of Ni50.6Ti24.4Hf25.0 shape memory alloy",

abstract = "Changes in transformation temperatures and high-temperature mechanical behavior of the new Ni50.6Ti34.4Hf25.0 alloy were determined after selected aging treatments. Differential scanning calorimetry was used to compare the homogenized, solution-treated and aged specimens for a wide combination of aging temperatures and times. Isothermal deformation experiments were conducted measuring reversible transformation strains with digital image correlation. Extraordinary superelasticity was found at test temperatures up to 300 °C for the specimen aged at 500 °C for 4 h.",

keywords = "Differential scanning calorimetry, Digital image correlation, Pseudoelasticity, Shape memory",

author = "Luca Patriarca and Huseyin Sehitoglu",

note = "Funding Information: The work was supported by NSF-CMMI 1333884 which is gratefully acknowledged. Publisher Copyright: {\textcopyright} 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.",

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AB - Changes in transformation temperatures and high-temperature mechanical behavior of the new Ni50.6Ti34.4Hf25.0 alloy were determined after selected aging treatments. Differential scanning calorimetry was used to compare the homogenized, solution-treated and aged specimens for a wide combination of aging temperatures and times. Isothermal deformation experiments were conducted measuring reversible transformation strains with digital image correlation. Extraordinary superelasticity was found at test temperatures up to 300 °C for the specimen aged at 500 °C for 4 h.

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