Giant elastocaloric effect in directionally solidified Ni–Mn–In magnetic shape memory alloy. (August 2015)

• Record Type: Journal Article
• Authors: Huang, Y.J.; Hu, Q.D.; Bruno, N.M.; Chen, Jing-Han; Karaman, I.; Ross, Joseph H.; Li, J.G.
• Is Part Of: Scripta materialia. Volume 105(2015)
• Page Start: 42
• Page End: 45
• Publication Date: 2015-08
• Subjects: Magnetic shape memory alloys (MSMAs) -- Elastocaloric effect -- Ni–Mn–In -- Directional solidification -- Martensitic transformation; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.04.024
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract : We have studied the giant elastocaloric effect of directionally solidified Ni–Mn–In magnetic shape memory alloys (MSMAs) near room temperature. The textured microstructure significantly enhances the ductility of Ni–Mn-based MSMAs, which allows obtaining the martensitic transition characteristics of polycrystalline samples in a uniaxial stress field. A significant cooling level of about 4 K is measured when the stress is released. The experimentally measured temperature changes are found to be in good agreement with the theoretically calculated values.