Tunable elastic modulus in Mn-based antiferromagnetic shape memory alloys
Compared with the normal relation between temperature ( T ) and elastic modulus ( E ) in most materials, martensitic transformation (MT) and magnetic transition could result in the softening of elastic modulus (d E/ d T > 0) within a narrow range of T (<100 °C). It becomes possible in MnFeCu...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2016-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/3/7/075701 |
| _version_ | 1797747259113209856 |
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| author | S S Cui S Shi Z M Zhao Y G Cui C Liu F Yuan J W Hou J F Wan J H Zhang Y H Rong |
| author_facet | S S Cui S Shi Z M Zhao Y G Cui C Liu F Yuan J W Hou J F Wan J H Zhang Y H Rong |
| author_sort | S S Cui |
| collection | DOAJ |
| description | Compared with the normal relation between temperature ( T ) and elastic modulus ( E ) in most materials, martensitic transformation (MT) and magnetic transition could result in the softening of elastic modulus (d E/ d T > 0) within a narrow range of T (<100 °C). It becomes possible in MnFeCu alloys to tune this range and broaden it to about 200 °C through combining MT and paramagnetic-antiferromagnetic (P-A) transition. The alloying elements and their contents play a key role in making MT separate from P-A transition, in which first-order MT made a greater contribution to this maximum value than second-order P-A transition. The intrinsic mechanism is that MT can continue causing the modulus to soften even after the P-A transition ends. This wide range keeps stable under different cooling/heating rates. An expression for d E/ d T is deduced based on the proposed free energy model and the corresponding theoretical curve (d E/ d T-T ) gives a reasonable explanation on the experimental results in MnFeCu alloys. A modulus–temperature–composition phase diagram is obtained to describe such critical behaviors and it is found that there exists a specific triangle zone in which d E/ d T > 0. The present results may enrich approaches to designing new functional materials, e.g. the elastic and Elinvar alloys. |
| first_indexed | 2024-03-12T15:49:17Z |
| format | Article |
| id | doaj.art-c3cb1c97615f4b47a54d056239c53672 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:49:17Z |
| publishDate | 2016-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-c3cb1c97615f4b47a54d056239c536722023-08-09T15:19:12ZengIOP PublishingMaterials Research Express2053-15912016-01-013707570110.1088/2053-1591/3/7/075701Tunable elastic modulus in Mn-based antiferromagnetic shape memory alloysS S Cui0S Shi1Z M Zhao2Y G Cui3C Liu4F Yuan5J W Hou6J F Wan7J H Zhang8Y H Rong9School of materials science and engineering, Shanghai JiaoTong University , Shanghai 20030, People’s Republic of ChinaSchool of materials science and engineering, Shanghai JiaoTong University , Shanghai 20030, People’s Republic of ChinaSchool of materials science and engineering, Shanghai JiaoTong University , Shanghai 20030, People’s Republic of ChinaSchool of materials science and engineering, Shanghai JiaoTong University , Shanghai 20030, People’s Republic of ChinaSchool of materials science and engineering, Northwestern University , Illinois 60208, USASchool of materials science and engineering, Shanghai JiaoTong University , Shanghai 20030, People’s Republic of ChinaInstrumental analysis centre, Shanghai JiaoTong University , Shanghai 20030, People’s Republic of ChinaSchool of materials science and engineering, Shanghai JiaoTong University , Shanghai 20030, People’s Republic of ChinaSchool of materials science and engineering, Shanghai JiaoTong University , Shanghai 20030, People’s Republic of ChinaSchool of materials science and engineering, Shanghai JiaoTong University , Shanghai 20030, People’s Republic of ChinaCompared with the normal relation between temperature ( T ) and elastic modulus ( E ) in most materials, martensitic transformation (MT) and magnetic transition could result in the softening of elastic modulus (d E/ d T > 0) within a narrow range of T (<100 °C). It becomes possible in MnFeCu alloys to tune this range and broaden it to about 200 °C through combining MT and paramagnetic-antiferromagnetic (P-A) transition. The alloying elements and their contents play a key role in making MT separate from P-A transition, in which first-order MT made a greater contribution to this maximum value than second-order P-A transition. The intrinsic mechanism is that MT can continue causing the modulus to soften even after the P-A transition ends. This wide range keeps stable under different cooling/heating rates. An expression for d E/ d T is deduced based on the proposed free energy model and the corresponding theoretical curve (d E/ d T-T ) gives a reasonable explanation on the experimental results in MnFeCu alloys. A modulus–temperature–composition phase diagram is obtained to describe such critical behaviors and it is found that there exists a specific triangle zone in which d E/ d T > 0. The present results may enrich approaches to designing new functional materials, e.g. the elastic and Elinvar alloys.https://doi.org/10.1088/2053-1591/3/7/075701elastic modulusmartensitic transformationmagnetic transitioncritical phenomenon |
| spellingShingle | S S Cui S Shi Z M Zhao Y G Cui C Liu F Yuan J W Hou J F Wan J H Zhang Y H Rong Tunable elastic modulus in Mn-based antiferromagnetic shape memory alloys Materials Research Express elastic modulus martensitic transformation magnetic transition critical phenomenon |
| title | Tunable elastic modulus in Mn-based antiferromagnetic shape memory alloys |
| title_full | Tunable elastic modulus in Mn-based antiferromagnetic shape memory alloys |
| title_fullStr | Tunable elastic modulus in Mn-based antiferromagnetic shape memory alloys |
| title_full_unstemmed | Tunable elastic modulus in Mn-based antiferromagnetic shape memory alloys |
| title_short | Tunable elastic modulus in Mn-based antiferromagnetic shape memory alloys |
| title_sort | tunable elastic modulus in mn based antiferromagnetic shape memory alloys |
| topic | elastic modulus martensitic transformation magnetic transition critical phenomenon |
| url | https://doi.org/10.1088/2053-1591/3/7/075701 |
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