Toughening of Polycrystalline Ni-Mn-Based Ferromagnetic Shape Memory Alloys
The solid-state refrigeration technology is expected to replace the traditional gas compression refrigeration tech-nology because of its environmental protection,high efficiency,and energy saving characteristics.Among various competitive solid-state cooling materials,Ni-Mn-based ferromagnetic memory alloys have received widespread attention due to their mul-tifunctional properties such as magnetocaloric effect,elastocaloric effect,barocaloric effect,magnetoresistance,and magnet-ic field induced strain,etc.In recent years,materials engineers and scientists have carried out a series of in-depth studies on the thermal effects of Ni-Mn-based magnetic shape memory alloys and have obtained numerous research results.However,the poor toughness and cyclic stability greatly limited their practical application in solid-state refrigeration region.This article summarizes the influence of element doping,microstructure design and size effect on the strength and toughness of Ni-Mn-based ferromagnetic shape memory alloys,where the mechanisms are also summarized.The pros and cons of different meth-ods in Ni-Mn-based alloy toughness enhancement are compared.The main problems existing in orbital hybridization methods are analyzed.The main research direction of Ni-Mn-based ferromagnetic memory alloy is prospected,which has important theoretical significance and research value for promoting the application of Ni-Mn-based ferromagnetic memory alloy in vari-ous fields.
NETL
NSTL
万方数据
维普
