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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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 |
work_keys_str_mv |
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