Effect of Ni-Content on the Transformation Temperatures in NiTi-20 at. % Zr High Temperature Shape Memory Alloys

Effect of Ni-Content on the Transformation Temperatures in NiTi-20 at. % Zr High Temperature Shape Memory Alloys

The effect of Ni-content on phase transformation behavior of NiTi-20 at. % Zr high temperature shape memory alloy (HTSMA) is investigated over a small composition range, i.e., 49.8, 50.0 and 50.2 at. % Ni, by differential scanning calorimetry (DSC), high-energy synchrotron radiation X-ray diffractio...

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Bibliographic Details
Main Authors: Matthew Carl, Jesse D. Smith, Brian Van Doren, Marcus L. Young
Format: Article
Language:English
Published: MDPI AG 2017-11-01
Series:Metals
Subjects:
shape memory alloys
high temperature shape memory alloy (HTSMA)
NiTiZr
NiTi
Online Access:https://www.mdpi.com/2075-4701/7/11/511
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spelling doaj-9666f6d170c24c38be3619568cb62ada2020-11-24T22:07:36ZengMDPI AGMetals2075-47012017-11-0171151110.3390/met7110511met7110511Effect of Ni-Content on the Transformation Temperatures in NiTi-20 at. % Zr High Temperature Shape Memory AlloysMatthew Carl0Jesse D. Smith1Brian Van Doren2Marcus L. Young3Department of Materials Science and Engineering, University of North Texas, Denton, TX 76203, USADepartment of Materials Science and Engineering, University of North Texas, Denton, TX 76203, USAATI Specialty Alloys and Components, Albany, OR 97321, USADepartment of Materials Science and Engineering, University of North Texas, Denton, TX 76203, USAThe effect of Ni-content on phase transformation behavior of NiTi-20 at. % Zr high temperature shape memory alloy (HTSMA) is investigated over a small composition range, i.e., 49.8, 50.0 and 50.2 at. % Ni, by differential scanning calorimetry (DSC), high-energy synchrotron radiation X-ray diffraction (SR-XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). All samples show a monoclinic B19′ martensitic structure at room temperature. It is shown that even with these small variations in Ni-content, the alloy shows vastly different transformation temperatures and responds in a drastically different manner to aging treatments at 550 and 600 °C. Lastly, a discussion on H-phase composition with respect to bulk composition is presented.https://www.mdpi.com/2075-4701/7/11/511shape memory alloyshigh temperature shape memory alloy (HTSMA)NiTiZrNiTi
collection DOAJ
language English
format Article
sources DOAJ
author Matthew Carl
Jesse D. Smith
Brian Van Doren
Marcus L. Young
spellingShingle Matthew Carl
Jesse D. Smith
Brian Van Doren
Marcus L. Young
Effect of Ni-Content on the Transformation Temperatures in NiTi-20 at. % Zr High Temperature Shape Memory Alloys
Metals
shape memory alloys
high temperature shape memory alloy (HTSMA)
NiTiZr
NiTi
author_facet Matthew Carl
Jesse D. Smith
Brian Van Doren
Marcus L. Young
author_sort Matthew Carl
title Effect of Ni-Content on the Transformation Temperatures in NiTi-20 at. % Zr High Temperature Shape Memory Alloys
title_short Effect of Ni-Content on the Transformation Temperatures in NiTi-20 at. % Zr High Temperature Shape Memory Alloys
title_full Effect of Ni-Content on the Transformation Temperatures in NiTi-20 at. % Zr High Temperature Shape Memory Alloys
title_fullStr Effect of Ni-Content on the Transformation Temperatures in NiTi-20 at. % Zr High Temperature Shape Memory Alloys
title_full_unstemmed Effect of Ni-Content on the Transformation Temperatures in NiTi-20 at. % Zr High Temperature Shape Memory Alloys
title_sort effect of ni-content on the transformation temperatures in niti-20 at. % zr high temperature shape memory alloys
publisher MDPI AG
series Metals
issn 2075-4701
publishDate 2017-11-01
description The effect of Ni-content on phase transformation behavior of NiTi-20 at. % Zr high temperature shape memory alloy (HTSMA) is investigated over a small composition range, i.e., 49.8, 50.0 and 50.2 at. % Ni, by differential scanning calorimetry (DSC), high-energy synchrotron radiation X-ray diffraction (SR-XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). All samples show a monoclinic B19′ martensitic structure at room temperature. It is shown that even with these small variations in Ni-content, the alloy shows vastly different transformation temperatures and responds in a drastically different manner to aging treatments at 550 and 600 °C. Lastly, a discussion on H-phase composition with respect to bulk composition is presented.
topic shape memory alloys
high temperature shape memory alloy (HTSMA)
NiTiZr
NiTi
url https://www.mdpi.com/2075-4701/7/11/511
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AT marcuslyoung effectofnicontentonthetransformationtemperaturesinniti20atzrhightemperatureshapememoryalloys
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