Large elastic strain and elastocaloric effect caused by lattice softening in an iron-palladium alloy | Zendy

Tomoyuki Kakeshita | Zendy; Fei Xiao | Zendy; Takashi Fukuda | Zendy

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Large elastic strain and elastocaloric effect caused by lattice softening in an iron-palladium alloy

Author(s) -

Tomoyuki Kakeshita,

Fei Xiao,

Takashi Fukuda

Publication year - 2016

Publication title -

philosophical transactions of the royal society a mathematical physical and engineering sciences

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.074

H-Index - 169

eISSN - 1471-2962

pISSN - 1364-503X

DOI - 10.1098/rsta.2015.0312

Subject(s) - softening , materials science , tetragonal crystal system , alloy , martensite , diffusionless transformation , atmospheric temperature range , condensed matter physics , lattice constant , pseudoelasticity , thermodynamics , metallurgy , composite material , crystallography , crystal structure , microstructure , diffraction , chemistry , physics , optics

A Fe-31.2Pd (at.%) alloy exhibits a weak first-order martensitic transformation from a cubic structure to a tetragonal structure near 230 K. This transformation is associated with significant softening of elastic constantC ′. Because of the softening, the alloy shows a large elastic strain of more than 6% in the [001] direction. In addition, the alloy has a critical point and shows a high elastocaloric effect in a wide temperature range for both the parent and the martensite phases.This article is part of the themed issue ‘Taking the temperature of phase transitions in cool materials’.

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