Elastocaloric effect in a Co50Ni20Ga30 single crystal. (15th January 2017)

• Record Type: Journal Article
• Authors: Shen, Ao; Zhao, Dewei; Sun, Wen; Liu, Jian; Li, Caiju
• Is Part Of: Scripta materialia. Volume 127(2017)
• Page Start: 1
• Page End: 5
• Publication Date: 2017-01-15
• Subjects: Shape memory alloy -- Martensitic transformation -- Elastocaloric effect; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.08.030
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Elastocaloric effect for a Co50 Ni20 Ga30 single crystal has been investigated. A local adiabatic temperature change (Δ T ) of − 6 K was observed on the removal of a uniaxial stress of 150 MPa at 291 K. Infrared thermography measurement reveal a correlated response of martensitic bands and temperature mapping. Both elastocaloric effect and superelasticity exhibit a good reversibility in the 100 times of cycling test. The experimentally obtained Δ T value agrees well with the theoretical one by analyzing the temperature dependence of critical stress based on the Clausius-Clapeyron equation. Graphical abstract: