Effect of thermal and mechanical cycling on the elastic and dissipative energy in CuAl(11.5wt%)Ni(5.0wt%) shape memory alloy

T. Y. Elrasasi, M. M. Dobróka, L. Daróczi, D. L. Beke

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Effect of thermal and mechanical cycling on β/β′ phase transformation in CuAl(11.5 wt%)Ni(5.0 wt%) single crystalline shape memory alloy was studied. The ε-σ and ξ-T hysteretic loops were investigated after different numbers of thermal and mechanical cycles (ε and ξ are the relative deformation and martensite fraction respectively, σ and T denote the stress and temperature). The ε-σ loops were determined at fixed temperature (373 K). The ξ-T loops under zero stress were calculated from the DSC curves measured. The elastic and the dissipative energy contributions, following the procedure given in [1,2], were calculated as the function of the transformed fraction for both types of the hysteretic loops. Finally the dependence of the total elastic, E, and dissipative energy, D, (per one cycle) on the cycling number was calculated. In thermal cycling E increased by about 12 J/mol, and D decreased by about 6 J/mol. On the other hand for mechanical cycling E decreased by about 6 J/mol and D increased by about 0.2 J/mol.

Original languageEnglish
Pages (from-to)S517-S520
JournalJournal of Alloys and Compounds
Volume577
Issue numberSUPPL. 1
DOIs
Publication statusPublished - Nov 15 2013

Keywords

  • Effect of cycling
  • Martensitic transformation
  • Shape memory

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Effect of thermal and mechanical cycling on the elastic and dissipative energy in CuAl(11.5wt%)Ni(5.0wt%) shape memory alloy'. Together they form a unique fingerprint.

  • Cite this