Orientation dependent cyclic stability of the elastocaloric effect in textured Ni-Mn-Ga alloys
High-performance elastocaloric materials require a large reversible elastocaloric effect and long life cyclic stability. Here, we fabricated textured polycrystalline Ni50.4Mn27.3Ga22.3 alloys by cost-effective casting method to create a <001> texture. A strong correlation between the cyclic st...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2018-05-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.5028212 |
| _version_ | 1828336320445939712 |
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| author | Longsha Wei Xuexi Zhang Jian Liu Lin Geng |
| author_facet | Longsha Wei Xuexi Zhang Jian Liu Lin Geng |
| author_sort | Longsha Wei |
| collection | DOAJ |
| description | High-performance elastocaloric materials require a large reversible elastocaloric effect and long life cyclic stability. Here, we fabricated textured polycrystalline Ni50.4Mn27.3Ga22.3 alloys by cost-effective casting method to create a <001> texture. A strong correlation between the cyclic stability and the crystal orientation was demonstrated. A large reversible adiabatic temperature change ΔT ∼6 K was obtained when the external stress was applied parallel to <001> direction. However, the ΔT decreased rapidly after 50 cycles, showing an unstable elastocaloric effect (eCE). On the other hand, when the external stress was applied perpendicular to <001>, the adiabatic ΔT was smaller ∼4 K, but was stable over 100 cycles. This significantly enhanced eCE stability was related to the high yield strength, low transformation strain and much higher crack initiation-propagation resistances perpendicular to <001> direction. This study provides a feasible strategy for optimizing the eCE property by creation of the texture structure in polycrystalline Ni-Mn-Ga and Ni-Mn-X (X= In, Sn, Sb) alloys. |
| first_indexed | 2024-04-13T21:58:18Z |
| format | Article |
| id | doaj.art-75fd4aa8fd8e4553a8c01b72ae181677 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-04-13T21:58:18Z |
| publishDate | 2018-05-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-75fd4aa8fd8e4553a8c01b72ae1816772022-12-22T02:28:10ZengAIP Publishing LLCAIP Advances2158-32262018-05-0185055312055312-810.1063/1.5028212031805ADVOrientation dependent cyclic stability of the elastocaloric effect in textured Ni-Mn-Ga alloysLongsha Wei0Xuexi Zhang1Jian Liu2Lin Geng3School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR ChinaSchool of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR ChinaKey Laboratory of Magnetic Materials and Devices, Ningbo Institute of Material Technology and Engineering, CAS, Ningbo 315201, PR ChinaSchool of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR ChinaHigh-performance elastocaloric materials require a large reversible elastocaloric effect and long life cyclic stability. Here, we fabricated textured polycrystalline Ni50.4Mn27.3Ga22.3 alloys by cost-effective casting method to create a <001> texture. A strong correlation between the cyclic stability and the crystal orientation was demonstrated. A large reversible adiabatic temperature change ΔT ∼6 K was obtained when the external stress was applied parallel to <001> direction. However, the ΔT decreased rapidly after 50 cycles, showing an unstable elastocaloric effect (eCE). On the other hand, when the external stress was applied perpendicular to <001>, the adiabatic ΔT was smaller ∼4 K, but was stable over 100 cycles. This significantly enhanced eCE stability was related to the high yield strength, low transformation strain and much higher crack initiation-propagation resistances perpendicular to <001> direction. This study provides a feasible strategy for optimizing the eCE property by creation of the texture structure in polycrystalline Ni-Mn-Ga and Ni-Mn-X (X= In, Sn, Sb) alloys.http://dx.doi.org/10.1063/1.5028212 |
| spellingShingle | Longsha Wei Xuexi Zhang Jian Liu Lin Geng Orientation dependent cyclic stability of the elastocaloric effect in textured Ni-Mn-Ga alloys AIP Advances |
| title | Orientation dependent cyclic stability of the elastocaloric effect in textured Ni-Mn-Ga alloys |
| title_full | Orientation dependent cyclic stability of the elastocaloric effect in textured Ni-Mn-Ga alloys |
| title_fullStr | Orientation dependent cyclic stability of the elastocaloric effect in textured Ni-Mn-Ga alloys |
| title_full_unstemmed | Orientation dependent cyclic stability of the elastocaloric effect in textured Ni-Mn-Ga alloys |
| title_short | Orientation dependent cyclic stability of the elastocaloric effect in textured Ni-Mn-Ga alloys |
| title_sort | orientation dependent cyclic stability of the elastocaloric effect in textured ni mn ga alloys |
| url | http://dx.doi.org/10.1063/1.5028212 |
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