Elastocaloric effects in the extreme

H. Sehitoglu; Y. Wu; E. Ertekin

doi:10.1016/j.scriptamat.2017.05.017

Elastocaloric effects in the extreme

Research output: Contribution to journal › Article › peer-review

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, M_d temperature, and fatigue.

Original language	English (US)
Pages (from-to)	122-126
Number of pages	5
Journal	Scripta Materialia
Volume	148
DOIs	https://doi.org/10.1016/j.scriptamat.2017.05.017
State	Published - Apr 15 2018

Keywords

Elastocaloric effect
Entropy change
Fatigue
Hysteresis
Shape memory alloys

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

Online availability

10.1016/j.scriptamat.2017.05.017

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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.",

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AU - Sehitoglu, H.

AU - Wu, Y.

AU - Ertekin, E.

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Y1 - 2018/4/15

N2 - 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.

AB - 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.

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KW - Entropy change

KW - Fatigue

KW - Hysteresis

KW - Shape memory alloys

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Elastocaloric effects in the extreme

Abstract

Keywords

ASJC Scopus subject areas

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