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Influence of Doping Tb on the Mechanical Properties and Martensitic Transformation of Ni-Mn-Sn Magnetic Shape Memory Alloys
- Source :
- Crystals, Volume 8, Issue 6, Crystals, Vol 8, Iss 6, p 247 (2018)
- Publication Year :
- 2018
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2018.
-
Abstract
- Brittleness and low working temperature are two key factors that restrict the application of Ni-Mn-Sn alloys. Element doping is an effective means to improve performance of materials. In present paper, martensitic transformation (MT) and mechanical properties of Ni48Mn39Sn13&minus<br />xTbx (x = 0, 0.5, 1, 2, and 5 at.%) alloys are investigated. It is found that the Tb addition refines significantly the grains and causes the formation of a Tb-rich phase. All the samples undergo the martensitic transformation from parent phase to martensite. And the martensitic transformation characteristic temperatures increase remarkably from &minus<br />60.7 &deg<br />C for x = 0 to 364.1 &deg<br />C for x = 5. The appropriate amount of Tb addition in Ni48Mn39Sn13&minus<br />xTbx (x = 0, 0.5, 1, 2, and 5 at.%) alloys significantly enhances the compressive strength and improves the ductility, which can be ascribed to the grain refinement. The compressive stress of 571.8 MPa and strain 22.0% are obtained in the Ni48Mn39Sn11Tb2 alloy. Then the mechanical properties decrease with the further increased Tb content. Simultaneous improving of martensitic transformation temperature and mechanical properties in Ni-Mn-Sn magnetic alloy are achieved by Tb doping.
- Subjects :
- Materials science
General Chemical Engineering
Alloy
02 engineering and technology
engineering.material
mechanical properties
01 natural sciences
Inorganic Chemistry
Phase (matter)
0103 physical sciences
lcsh:QD901-999
General Materials Science
Magnetic alloy
Composite material
Ductility
ferromagnetic shape memory alloys
010302 applied physics
Ni-Mn-Sn
021001 nanoscience & nanotechnology
Condensed Matter Physics
martensitic transformation
Tb doping
Compressive strength
rare earth element
Magnetic shape-memory alloy
Diffusionless transformation
Martensite
engineering
lcsh:Crystallography
0210 nano-technology
Subjects
Details
- Language :
- English
- ISSN :
- 20734352
- Database :
- OpenAIRE
- Journal :
- Crystals
- Accession number :
- edsair.doi.dedup.....5dbdf59601baf40326947f47e310a3d4
- Full Text :
- https://doi.org/10.3390/cryst8060247