Effects of deformation temperature and amount on the two-way shape memory effect of solutionized Ni50.8Ti49.2 alloys

I. Kaya; E. Acar; H. E. Karaca

doi:10.1016/j.intermet.2019.106607

Effects of deformation temperature and amount on the two-way shape memory effect of solutionized Ni_50.8Ti_49.2 alloys

I. Kaya, E. Acar, H. E. Karaca

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

9 Scopus citations

Abstract

Temperature dependent compressive response and two-way shape memory effect (TWSME) of Ni_50.8Ti_49.2 (at.%) shape memory alloys were systematically investigated. It was found that solutionized Ni_50.8Ti_49.2 alloys could show positive and negative TWSME if they are plastically deformed in martensite and austenite (above M_d), respectively. The maximum positive TWSME strain was 1.4% after martensite deformation of 8% at −90 °C and maximum negative TWSME strain of 0.5% was obtained after austenite deformation of 8% at 200 °C.

Original language	English
Article number	106607
Journal	Intermetallics
Volume	114
DOIs	https://doi.org/10.1016/j.intermet.2019.106607
State	Published - Nov 2019

Bibliographical note

Publisher Copyright:
© 2019 Elsevier Ltd

Keywords

Mechanical testing
NiTi
Phase transformation
R-phase
Shape–memory alloys
Two-way shape memory effect

ASJC Scopus subject areas

General Chemistry
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.intermet.2019.106607

Cite this

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title = "Effects of deformation temperature and amount on the two-way shape memory effect of solutionized Ni50.8Ti49.2 alloys",

abstract = "Temperature dependent compressive response and two-way shape memory effect (TWSME) of Ni50.8Ti49.2 (at.%) shape memory alloys were systematically investigated. It was found that solutionized Ni50.8Ti49.2 alloys could show positive and negative TWSME if they are plastically deformed in martensite and austenite (above Md), respectively. The maximum positive TWSME strain was 1.4% after martensite deformation of 8% at −90 °C and maximum negative TWSME strain of 0.5% was obtained after austenite deformation of 8% at 200 °C.",

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AU - Kaya, I.

AU - Acar, E.

AU - Karaca, H. E.

PY - 2019/11

Y1 - 2019/11

N2 - Temperature dependent compressive response and two-way shape memory effect (TWSME) of Ni50.8Ti49.2 (at.%) shape memory alloys were systematically investigated. It was found that solutionized Ni50.8Ti49.2 alloys could show positive and negative TWSME if they are plastically deformed in martensite and austenite (above Md), respectively. The maximum positive TWSME strain was 1.4% after martensite deformation of 8% at −90 °C and maximum negative TWSME strain of 0.5% was obtained after austenite deformation of 8% at 200 °C.

AB - Temperature dependent compressive response and two-way shape memory effect (TWSME) of Ni50.8Ti49.2 (at.%) shape memory alloys were systematically investigated. It was found that solutionized Ni50.8Ti49.2 alloys could show positive and negative TWSME if they are plastically deformed in martensite and austenite (above Md), respectively. The maximum positive TWSME strain was 1.4% after martensite deformation of 8% at −90 °C and maximum negative TWSME strain of 0.5% was obtained after austenite deformation of 8% at 200 °C.

KW - Mechanical testing

KW - NiTi

KW - Phase transformation

KW - R-phase

KW - Shape–memory alloys

KW - Two-way shape memory effect

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