Details

Autor(en) / Beteiligte

• Zhang, Guoyao
• Li, Zongbin
• Yang, Jiajing
• Yang, Bo
• Wang, Dunhui
• Zhang, Yudong
• Esling, Claude
• Hou, Long
• Li, Xi
• Zhao, Xiang
• Zuo, Liang

Titel

Giant elastocaloric effect in a Mn-rich Ni44Mn46Sn10 directionally solidified alloy

Ist Teil von

• Applied physics letters, 2020-01, Vol.116 (2)

Ort / Verlag

Melville: American Institute of Physics

Erscheinungsjahr

2020

Quelle

American Institute of Physics (AIP) Journals

Beschreibungen/Notizen

• The superelastic and elastocaloric properties of a Mn-rich Ni44Mn46Sn10 polycrystalline alloy prepared by directional solidification were studied. Owing to the coarse columnar shaped grains with strong ⟨001⟩A preferred orientation, a large superelastic strain up to 8% and a transformation strain of 5.6% can be obtained through compressive stress induced martensitic transformation. Moreover, a giant adiabatic temperature variation up to –18 K was achieved on removing the stress. Such a remarkable elastocaloric effect is attributed to the large transformation entropy change through composition modification and the enhanced mechanical properties due to the formation of a highly textured microstructure in the directionally solidified alloy.