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

作者：Kakeshita Tomoyuki; Xiao Fei; Fukuda Takashi^*

来源：Philosophical Transactions of the Royal Society A-Mathematical Physical and Engineering Sciences, 2016, 374(2074): 20150312.

DOI：10.1098/rsta.2015.0312

• martensite
• phase transformation
• elastic deformation

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'.

• 出版日期2016-8-13