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

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This article investigates the effect of Ni-content on phase transformation behavior of NiTi-20 at. % Zr high temperature shape memory alloy.

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15 p.

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Carl, Matthew; Smith, Jesse D.; Van Doren, Brian & Young, Marcus L. November 21, 2017.

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This article investigates the effect of Ni-content on phase transformation behavior of NiTi-20 at. % Zr high temperature shape memory alloy.

Physical Description

15 p.

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Abstract: 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.

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  • Metals, 2017. Basel, Switzerland: Multidisciplinary Digital Publishing Institute

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  • Publication Title: Metals
  • Volume: 7
  • Issue: 511
  • Pages: 1-15
  • Peer Reviewed: Yes

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UNT Scholarly Works

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  • October 18, 2017

Accepted Date

  • November 16, 2017

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  • November 21, 2017

Added to The UNT Digital Library

  • Nov. 30, 2017, 9:17 a.m.

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Carl, Matthew; Smith, Jesse D.; Van Doren, Brian & Young, Marcus L. Effect of Ni-Content on the Transformation Temperatures in NiTi-20 at. % Zr High Temperature Shape Memory Alloys, article, November 21, 2017; Basel, Switzerland. (digital.library.unt.edu/ark:/67531/metadc1042618/: accessed December 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT College of Engineering.