Related Experiment Video
Updated: Dec 22, 2025

Determining the Mechanical Strength of Ultra-Fine-Grained Metals
Published on: November 22, 2021
Large elastic strain and elastocaloric effect caused by lattice softening in an iron-palladium alloy
Tomoyuki Kakeshita1, Fei Xiao2, Takashi Fukuda2
1Department of Materials Science and Engineering, Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, Suita, Osaka 565-0871, Japan fukuda@mat.eng.osaka-u.ac.jp.
Abstract:
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 constant C'. 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'.
Related Concept Videos
Hooke's Law
Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity
Thermal Strain
Elastic Strain Energy for Shearing Stresses
Elastic Strain Energy for Normal Stresses
If...
Strain and Elastic Modulus

