Effects of aging on the shape memory and superelasticity behavior of ultra-high strength Ni54Ti46 alloys under compression

I. Kaya; H. Tobe; H. E. Karaca; B. Basaran; M. Nagasako; R. Kainuma; Y. Chumlyakov

doi:10.1016/j.msea.2016.09.078

Effects of aging on the shape memory and superelasticity behavior of ultra-high strength Ni₅₄Ti₄₆ alloys under compression

I. Kaya, H. Tobe, H. E. Karaca, B. Basaran, M. Nagasako, R. Kainuma, Y. Chumlyakov

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

21 Scopus citations

Abstract

This study investigates the effects of aging on the shape memory and superelasticity behavior of a Ni-rich Ni₅₄Ti₄₆ (at%) alloy. Differential scanning calorimetry (DSC), X-ray diffraction (XRD), transmission electron microscopy (TEM) and compression test (thermal cycling under stress and superelasticity) were carried out after 3 h agin;g from 450 °C to 600 °C. The alloys show recoverable shape memory effect with transformation strains of about 1% and narrow hysteresis under high stress levels. The work output of 14.1 Jg⁻¹ was observed at an ultra-high stress level of 1500 MPa after 600 °C 3 h aging. 450 °C 3 h aging resulted in a very narrow temperature hysteresis of 8°C under an ultra-high stress level of 1500 MPa. At room temperature, the superelastic response with 4% total strain was obtained even when high stress level of 2000 MPa is applied after 550 °C 3 h aging.

Original language	English
Pages (from-to)	93-100
Number of pages	8
Journal	Materials Science and Engineering: A
Volume	678
DOIs	https://doi.org/10.1016/j.msea.2016.09.078
State	Published - Dec 15 2016

Bibliographical note

Publisher Copyright:
© 2016 Elsevier B.V.

Keywords

High strength shape memory alloy
Multiple step phase transformation
Ni-rich NiTi shape memory alloy
R-phase transformation
Thermomechanical loading

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.msea.2016.09.078

Cite this

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title = "Effects of aging on the shape memory and superelasticity behavior of ultra-high strength Ni54Ti46 alloys under compression",

abstract = "This study investigates the effects of aging on the shape memory and superelasticity behavior of a Ni-rich Ni54Ti46 (at%) alloy. Differential scanning calorimetry (DSC), X-ray diffraction (XRD), transmission electron microscopy (TEM) and compression test (thermal cycling under stress and superelasticity) were carried out after 3 h agin;g from 450 °C to 600 °C. The alloys show recoverable shape memory effect with transformation strains of about 1% and narrow hysteresis under high stress levels. The work output of 14.1 Jg−1 was observed at an ultra-high stress level of 1500 MPa after 600 °C 3 h aging. 450 °C 3 h aging resulted in a very narrow temperature hysteresis of 8°C under an ultra-high stress level of 1500 MPa. At room temperature, the superelastic response with 4% total strain was obtained even when high stress level of 2000 MPa is applied after 550 °C 3 h aging.",

keywords = "High strength shape memory alloy, Multiple step phase transformation, Ni-rich NiTi shape memory alloy, R-phase transformation, Thermomechanical loading",

author = "I. Kaya and H. Tobe and Karaca, {H. E.} and B. Basaran and M. Nagasako and R. Kainuma and Y. Chumlyakov",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2016",

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day = "15",

doi = "10.1016/j.msea.2016.09.078",

language = "English",

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T1 - Effects of aging on the shape memory and superelasticity behavior of ultra-high strength Ni54Ti46 alloys under compression

AU - Kaya, I.

AU - Tobe, H.

AU - Karaca, H. E.

AU - Basaran, B.

AU - Nagasako, M.

AU - Kainuma, R.

AU - Chumlyakov, Y.

PY - 2016/12/15

Y1 - 2016/12/15

N2 - This study investigates the effects of aging on the shape memory and superelasticity behavior of a Ni-rich Ni54Ti46 (at%) alloy. Differential scanning calorimetry (DSC), X-ray diffraction (XRD), transmission electron microscopy (TEM) and compression test (thermal cycling under stress and superelasticity) were carried out after 3 h agin;g from 450 °C to 600 °C. The alloys show recoverable shape memory effect with transformation strains of about 1% and narrow hysteresis under high stress levels. The work output of 14.1 Jg−1 was observed at an ultra-high stress level of 1500 MPa after 600 °C 3 h aging. 450 °C 3 h aging resulted in a very narrow temperature hysteresis of 8°C under an ultra-high stress level of 1500 MPa. At room temperature, the superelastic response with 4% total strain was obtained even when high stress level of 2000 MPa is applied after 550 °C 3 h aging.

AB - This study investigates the effects of aging on the shape memory and superelasticity behavior of a Ni-rich Ni54Ti46 (at%) alloy. Differential scanning calorimetry (DSC), X-ray diffraction (XRD), transmission electron microscopy (TEM) and compression test (thermal cycling under stress and superelasticity) were carried out after 3 h agin;g from 450 °C to 600 °C. The alloys show recoverable shape memory effect with transformation strains of about 1% and narrow hysteresis under high stress levels. The work output of 14.1 Jg−1 was observed at an ultra-high stress level of 1500 MPa after 600 °C 3 h aging. 450 °C 3 h aging resulted in a very narrow temperature hysteresis of 8°C under an ultra-high stress level of 1500 MPa. At room temperature, the superelastic response with 4% total strain was obtained even when high stress level of 2000 MPa is applied after 550 °C 3 h aging.

KW - High strength shape memory alloy

KW - Multiple step phase transformation

KW - Ni-rich NiTi shape memory alloy

KW - R-phase transformation

KW - Thermomechanical loading

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