Elastocaloric effects in the extreme. (15th April 2018)

• Record Type: Journal Article
• Authors: Sehitoglu, H.; Wu, Y.; Ertekin, E.
• Is Part Of: Scripta materialia. Number 148(2018)
• Page Start: 122
• Page End: 126
• Publication Date: 2018-04-15
• Subjects: Shape memory alloys -- Elastocaloric effect -- Hysteresis -- Fatigue -- Entropy change; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2017.05.017
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: There is a resurgence of interest in the elastocaloric (EC) effect of shape memory alloys (SMAs). The temperature change associated with the EC effect can be substantial, far exceeding those observed in well-known electrocaloric and magnetocaloric materials. The major driver of the EC effect is the entropy change of transformation. Historically the EC effect under superelasticity has been studied at mainly 25 °C. The current paper considers six SMAs across a variety of test temperatures, focusing not only on the EC cooling capability but also on three important factors for practical application: the role of stress/thermal hysteresis, Md temperature, and fatigue.