Critical Analyses on the Instrumented Ultramicrohardness Results on Aging NiTi Alloy in Distinct Phase Fields

  • R. S. Teixeira
  • A. S. PaulaEmail author
  • F. S. Santos
  • P. F. Rodrigues
  • F. M. Braz Fernandes
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)


A study was carried out on a Ni-rich NiTi alloy solubilized at 850 °C and subjected to two different treatments: annealing for 0.5 h at 500 °C and rolling at room temperature followed by annealing for 0.5 h at 500 °C. In both cases, measurements of instrumented ultramicrohardness showed that the treatment promoted a superelastic effect.


NiTi alloy Instrumented ultramicrohardness Phase transformation Mechanical properties 



P. F. Rodrigues and F. M. Braz Fernandes acknowledge the funding of CENIMAT/I3N by COMPETE 2020, through FCT, under the project UID/CTM/50025/2013.

P. F. Rodrigues acknowledges the funding of CAPES (CsF/Brazil – BEX 11943-13-0). R. S. Teixeira, F. S. Santos and A. S. Paula acknowledge the funding of CNPq (master scholarship and research productivity scholarship PQ-2 – Process 307798/2015-1).

The authors thank Professor Jorge Otubo for donating the starting materials that were produced in the Instituto Tecnológico da Aeronáutica (São José dos Campos, SP – Brazil).

The authors thank Professors Ladário da Silva and José Augusto Oliveira Huguenin which allowed the use of the Laboratório Multiusuário de Caracterização de Materiais do Instituto de Ciências Exatas da Universidade Federal Fluminense (ICEx/UFF), in Volta Redonda/RJ - Brazil, for the use of the instrumented ultramicrohardness equipment for analysis of the samples.

The authors acknowledge the funding of European Program IRSES - Marie Curie PIRSES GA-2013-612585 (under the MIDAS project – “Micro and Nanoscale Design of Thermally Actuating Systems”).


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Copyright information

© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  • R. S. Teixeira
    • 1
  • A. S. Paula
    • 1
    Email author
  • F. S. Santos
    • 2
  • P. F. Rodrigues
    • 3
  • F. M. Braz Fernandes
    • 3
  1. 1.Seção de Engenharia Mecânica e de Materiais, Instituto Militar de Engenharia (IME)Rio de JaneiroBrazil
  2. 2.Departamento de Engenharia Química e de MateriaisPontifícia Universidade Católica (PUC)Rio de JaneiroBrazil
  3. 3.CENIMAT/i3N, Faculdade de Ciências e Tecnologia, Departamento de Ciência dos MateriaisUniversidade Nova de LisboaCaparicaPortugal

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