Abstract
Microstructure, martensitic transformation and mechanical property of Ni50Mn30Ga20 porous alloy with a pore diameter of 350–500 μm fabricated by imitation casting method using NaAlO2 as a pore former were investigated. The influence of porous structure on the shape memory effect and superelasticity of Ni50Mn30Ga20 alloy was analyzed. The porous structure reduces the constraints of the grain boundaries on the phase transformation and martensitic rearrangement. The heat treatment process can effectively optimize the grain structure at the nodes, pillars and walls of porous structure. Porous Ni50Mn30Ga20 has completely different mechanical behaviors at different temperatures. The heat recovery strain of the martensite porous alloy is as high as 80% at the room temperature and a superelasticity of 50% was obtained in the austenite porous alloy at 160 °C. The introduction of porous structure provides a new idea for improving the comprehensive performance of Ni–Mn-Ga alloy.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
