Thermal Arrest Memory Effect in Ni-Mn-Ga Alloys
Dilatation characteristics were measured to investigate the thermal arrest memory effect in Ni53.6Mn27.1Ga19.3 and Ni54.2Mn29.4Ga16.4 alloys. Interruption of the martensite-austenite phase transformation is connected with the reduction of the sample length after thermal cycle. If a total phase trans...
Saved in:
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2008-01-01
|
| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2008/659145 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832563607991222272 |
|---|---|
| author | A. Rudajevova |
| author_facet | A. Rudajevova |
| author_sort | A. Rudajevova |
| collection | DOAJ |
| description | Dilatation characteristics were measured to investigate the thermal arrest memory effect in Ni53.6Mn27.1Ga19.3 and Ni54.2Mn29.4Ga16.4 alloys. Interruption of the martensite-austenite phase transformation is connected with the reduction of the sample length after thermal cycle. If a total phase transformation took place in the complete thermal cycle following the interruption, then the sample length would return to its original length. Analysis of these results has shown that the thermal arrest memory effect is a consequence of a stress-focusing effect and shape memory effect. The stress-focusing effect occurs when the phase transformation propagates radially in a cylindrical sample from the surface, inward to the center. Evolution and release of the thermoelastic deformations in both alloys during heating and cooling are analyzed. |
| format | Article |
| id | doaj-art-fb005ae6fc09420c8601e4fd5007b5de |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2008-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-fb005ae6fc09420c8601e4fd5007b5de2025-02-03T01:13:05ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422008-01-01200810.1155/2008/659145659145Thermal Arrest Memory Effect in Ni-Mn-Ga AlloysA. Rudajevova0Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 12116 Praha 2, Czech RepublicDilatation characteristics were measured to investigate the thermal arrest memory effect in Ni53.6Mn27.1Ga19.3 and Ni54.2Mn29.4Ga16.4 alloys. Interruption of the martensite-austenite phase transformation is connected with the reduction of the sample length after thermal cycle. If a total phase transformation took place in the complete thermal cycle following the interruption, then the sample length would return to its original length. Analysis of these results has shown that the thermal arrest memory effect is a consequence of a stress-focusing effect and shape memory effect. The stress-focusing effect occurs when the phase transformation propagates radially in a cylindrical sample from the surface, inward to the center. Evolution and release of the thermoelastic deformations in both alloys during heating and cooling are analyzed.http://dx.doi.org/10.1155/2008/659145 |
| spellingShingle | A. Rudajevova Thermal Arrest Memory Effect in Ni-Mn-Ga Alloys Advances in Materials Science and Engineering |
| title | Thermal Arrest Memory Effect in Ni-Mn-Ga Alloys |
| title_full | Thermal Arrest Memory Effect in Ni-Mn-Ga Alloys |
| title_fullStr | Thermal Arrest Memory Effect in Ni-Mn-Ga Alloys |
| title_full_unstemmed | Thermal Arrest Memory Effect in Ni-Mn-Ga Alloys |
| title_short | Thermal Arrest Memory Effect in Ni-Mn-Ga Alloys |
| title_sort | thermal arrest memory effect in ni mn ga alloys |
| url | http://dx.doi.org/10.1155/2008/659145 |
| work_keys_str_mv | AT arudajevova thermalarrestmemoryeffectinnimngaalloys |