Ultrahigh damping and Young’s modulus softening due to a/b twins in 10M Ni-Mn-Ga martensite
| Autor: | V. Kaminskii, Andrey Saren, Sergey Kustov, Kari Ullakko, A. Sozinov |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Metals and Alloys Modulus Young's modulus 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Magnetic field symbols.namesake Magnetic shape-memory alloy Mechanics of Materials Martensite 0103 physical sciences Shear stress symbols General Materials Science Composite material 0210 nano-technology Crystal twinning Softening |
| Zdroj: | Scripta Materialia. 178:483-488 |
| ISSN: | 1359-6462 |
| Popis: | We study Young’s modulus and damping of 10M martensite in Ni50.0Mn28.4Ga21.6 magnetic shape memory alloy using a sample without a/c twin boundaries (TBs) and maximum or zero shear stress in a/b twinning planes. Damping is ~300 times higher and modulus ~3.5 times lower when shear stress acts on a/b TBs. Ultrahigh damping and low modulus are insensitive to magnetic field, show strong strain amplitude nonlinearity and are attributed to stress-induced motion of a regular system of mobile a/b TBs. Near the reverse transformation, E001 modulus without contribution of TBs is ~10 times higher than reported previously for 10M polyvariant sample. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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