Calculation of elastic energy contributions in single crystalline cu-11.5wt%Al-5.0wt%Ni shape memory alloy

T. Y. Elrasasi, L. Daróczi, D. Beke

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Using our local equilibrium model of the martensitic transformation [1] the elastic energy contributions, as the function of martensite volume fraction, ξ, in the phase transformation of single crystalline Cu-11.5wt%Al-5.0wt%Ni shape memory alloy were calculated from our measurements published earlier [2]. The derivative of the elastic energy δE/δξ=e (E is the total elastic energy stored/released during the austenite to martensite (A→M) as well as M→A transformation) could be calculated only irrespectively of the ΔST0 term (T0 is the equilibrium transformation temperature and ΔS is the entropy change of phase transformation). But, since ΔST0 is independent of ξ, the functions obtained reflect the ξ dependence of e as well as E quantities. From the DSC curves measured at zero uniaxial stress (σ = 0) [2], the ξ-T hysteric loop was constructed. Then the e(ξ) curves at fix σ as well as fix T were calculated. The E values obtained from the integral of e(ξ), fit well to the E(σ) as well as E(T) curves calculated from the strain-temperature and stresstemperature curves measured in [2].

Original languageEnglish
Title of host publicationMaterials Science Forum
Pages37-42
Number of pages6
Volume729
DOIs
Publication statusPublished - 2013
Event8th Hungarian Conference on Materials Science - Balatonkenese, Hungary
Duration: Oct 9 2011Oct 11 2011

Publication series

NameMaterials Science Forum
Volume729
ISSN (Print)02555476

Other

Other8th Hungarian Conference on Materials Science
CountryHungary
CityBalatonkenese
Period10/9/1110/11/11

Fingerprint

shape memory alloys
Shape memory effect
Martensite
Phase transitions
Crystalline materials
Martensitic transformations
curves
martensite
fixing
Austenite
phase transformations
Volume fraction
Entropy
Derivatives
Temperature
energy
martensitic transformation
austenite
entropy
temperature

Keywords

  • Elastic energy
  • Martensitic transformation
  • Shape memory

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Calculation of elastic energy contributions in single crystalline cu-11.5wt%Al-5.0wt%Ni shape memory alloy. / Elrasasi, T. Y.; Daróczi, L.; Beke, D.

Materials Science Forum. Vol. 729 2013. p. 37-42 (Materials Science Forum; Vol. 729).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Elrasasi, TY, Daróczi, L & Beke, D 2013, Calculation of elastic energy contributions in single crystalline cu-11.5wt%Al-5.0wt%Ni shape memory alloy. in Materials Science Forum. vol. 729, Materials Science Forum, vol. 729, pp. 37-42, 8th Hungarian Conference on Materials Science, Balatonkenese, Hungary, 10/9/11. https://doi.org/10.4028/www.scientific.net/MSF.729.37
Elrasasi, T. Y. ; Daróczi, L. ; Beke, D. / Calculation of elastic energy contributions in single crystalline cu-11.5wt%Al-5.0wt%Ni shape memory alloy. Materials Science Forum. Vol. 729 2013. pp. 37-42 (Materials Science Forum).
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