The influence of Ni4Ti3 precipitates orientation on two-way shape memory effect in a Ni-rich NiTi alloy

M. S. Shakeri, J. Khalil-Allafi (Corresponding Author), V. Abbasi-Chianeh, Arash Ghabchi

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

In this present work two-way shape memory effect (TWSME) induced by thermomechanical cycling treatments in a Ni-rich NiTi alloy was investigated.Effect of orientation of metastable and lenticular Ni4Ti3 precipitates as a governing parameter in different aging temperatures and time as well as applied strain on TWSME were studied. The results indicate that 450 °C is the optimum aging temperature to achieve highest recovery rate. The increasing of applied strain up to 3.38% and aging time up to 2.5 h at 450 °C improves the recovery rate. It has been concluded that formation of especial variants of Ni4Ti3 precipitates during aging and increasing of applied strain on thermomechanical cycling treatments could enhance the TWSME.
Original languageEnglish
Pages (from-to)320 - 323
Number of pages4
JournalJournal of Alloys and Compounds
Volume485
Issue number1 - 2
DOIs
Publication statusPublished - 2009
MoE publication typeA1 Journal article-refereed

Fingerprint

Shape memory effect
Precipitates
Aging of materials
Recovery
Temperature

Keywords

  • Shape memory
  • NiTi
  • TWSME
  • Thermomechanical cycles
  • Ni4Ti3 precipitates

Cite this

Shakeri, M. S. ; Khalil-Allafi, J. ; Abbasi-Chianeh, V. ; Ghabchi, Arash. / The influence of Ni4Ti3 precipitates orientation on two-way shape memory effect in a Ni-rich NiTi alloy. In: Journal of Alloys and Compounds. 2009 ; Vol. 485, No. 1 - 2. pp. 320 - 323.
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The influence of Ni4Ti3 precipitates orientation on two-way shape memory effect in a Ni-rich NiTi alloy. / Shakeri, M. S.; Khalil-Allafi, J. (Corresponding Author); Abbasi-Chianeh, V.; Ghabchi, Arash.

In: Journal of Alloys and Compounds, Vol. 485, No. 1 - 2, 2009, p. 320 - 323.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - The influence of Ni4Ti3 precipitates orientation on two-way shape memory effect in a Ni-rich NiTi alloy

AU - Shakeri, M. S.

AU - Khalil-Allafi, J.

AU - Abbasi-Chianeh, V.

AU - Ghabchi, Arash

PY - 2009

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N2 - In this present work two-way shape memory effect (TWSME) induced by thermomechanical cycling treatments in a Ni-rich NiTi alloy was investigated.Effect of orientation of metastable and lenticular Ni4Ti3 precipitates as a governing parameter in different aging temperatures and time as well as applied strain on TWSME were studied. The results indicate that 450 °C is the optimum aging temperature to achieve highest recovery rate. The increasing of applied strain up to 3.38% and aging time up to 2.5 h at 450 °C improves the recovery rate. It has been concluded that formation of especial variants of Ni4Ti3 precipitates during aging and increasing of applied strain on thermomechanical cycling treatments could enhance the TWSME.

AB - In this present work two-way shape memory effect (TWSME) induced by thermomechanical cycling treatments in a Ni-rich NiTi alloy was investigated.Effect of orientation of metastable and lenticular Ni4Ti3 precipitates as a governing parameter in different aging temperatures and time as well as applied strain on TWSME were studied. The results indicate that 450 °C is the optimum aging temperature to achieve highest recovery rate. The increasing of applied strain up to 3.38% and aging time up to 2.5 h at 450 °C improves the recovery rate. It has been concluded that formation of especial variants of Ni4Ti3 precipitates during aging and increasing of applied strain on thermomechanical cycling treatments could enhance the TWSME.

KW - Shape memory

KW - NiTi

KW - TWSME

KW - Thermomechanical cycles

KW - Ni4Ti3 precipitates

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DO - 10.1016/j.jallcom.2009.05.084

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VL - 485

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JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

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