Kurt Engelbrecht (Author), Jaka Tušek (Author), Simone Sanna (Author), Dan Eriksen (Author), Oleg V. Mishin (Author), Christian Robert Haffenden Bahl (Author), Nini Pryds (Author)

Abstract

Elastocaloric cooling has emerged as a promising alternative to vapor compression in recent years. Although the technology has the potential to be more e ffi cient than current technologies, there are many technical challenges that must be overcome to realize devices with high performance and acceptable durability. We study the e ff ects of surface finish and training techniques on dog bone shaped polycrystalline samples of NiTi. The fatigue life of several samples with four di ff erent surface finishes was measured and it was shown that a smooth surface, especially at the edges, greatly improved fatigue life. The e ff ects of training both on the structure of the materials and the thermal response to an applied strain was studied. The load profile for the first few cycles was shown to change the thermal response to strain, the structure of the material at failure while the final structure of the material was weakly influenced by the surface finish.

Keywords

elastocaloric effect;surface finish;colling;fatigue life;shape memory material;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FS - Faculty of Mechanical Engineering
UDC: 621.565.91(045)
COBISS: 14774555 Link will open in a new window
ISSN: 2166-532X
Views: 226
Downloads: 76
Average score: 0 (0 votes)
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Other data

Secondary language: Slovenian
Secondary keywords: elastokalorični efekt;kvaliteta površine;hlajenje;doba trajanja;material z oblikovnim spominom;
Type (COBISS): Article
Pages: f. 1-6
Issue: ǂVol. ǂ4
Chronology: 2016
DOI: 10.1063/1.4955131
ID: 12855953
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