Laser-Directed Energy Deposition of Fe-Mn-Si-Based Shape Memory Alloy: Microstructure, Mechanical Properties, and Shape Memory Properties
Fe-Mn-Si shape memory alloys (SMAs) have gained significant attention due to their unique characteristics. However, there remains a gap in the literature regarding the fabrication of these alloys using laser-directed energy deposition (LDED). This study fills this void, investigating the properties...
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MDPI AG
2023-12-01
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| Online Access: | https://www.mdpi.com/1996-1944/17/1/131 |
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| author | Bing Liu Cong Yao Jingtao Kang Ruidi Li Pengda Niu |
| author_facet | Bing Liu Cong Yao Jingtao Kang Ruidi Li Pengda Niu |
| author_sort | Bing Liu |
| collection | DOAJ |
| description | Fe-Mn-Si shape memory alloys (SMAs) have gained significant attention due to their unique characteristics. However, there remains a gap in the literature regarding the fabrication of these alloys using laser-directed energy deposition (LDED). This study fills this void, investigating the properties of Fe-Mn-Si SMAs produced by LDED. The shape memory performance of as-deposited Fe-Mn-Si SMAs was studied using a tensile method. Alloys underwent different degrees of deformation to assess their shape memory effect. Microstructural evaluations were conducted post-deformation to observe the internal structures of the alloys. The tensile tests revealed that shape recovery rates for deformation levels of 3%, 7%, 11%, and 15% were 68.1%, 44.2%, 31.7%, and 17.6%, respectively. Notably, the maximum recoverable deformation of the LDED-formed Fe-Mn-Si-based shape memory alloy reached 3.49%, surpassing the traditional deformation processing SMAs (<3%). The presence of a significant number of stacking faults was linked to the enhanced shape memory performance. The LDED technique demonstrates promising potential for the fabrication of Fe-Mn-Si SMAs, producing alloys with enhanced shape memory performance compared to traditionally processed SMAs. The study’s findings offer new insights and broaden the applicability of LDED in the field of SMAs. |
| first_indexed | 2024-03-08T15:02:37Z |
| format | Article |
| id | doaj.art-97fe65473f59430bbcfe3fab647da364 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-08T15:02:37Z |
| publishDate | 2023-12-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-97fe65473f59430bbcfe3fab647da3642024-01-10T15:02:44ZengMDPI AGMaterials1996-19442023-12-0117113110.3390/ma17010131Laser-Directed Energy Deposition of Fe-Mn-Si-Based Shape Memory Alloy: Microstructure, Mechanical Properties, and Shape Memory PropertiesBing Liu0Cong Yao1Jingtao Kang2Ruidi Li3Pengda Niu4Wuhan Second Ship Design and Research Institute, Wuhan 430064, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaFe-Mn-Si shape memory alloys (SMAs) have gained significant attention due to their unique characteristics. However, there remains a gap in the literature regarding the fabrication of these alloys using laser-directed energy deposition (LDED). This study fills this void, investigating the properties of Fe-Mn-Si SMAs produced by LDED. The shape memory performance of as-deposited Fe-Mn-Si SMAs was studied using a tensile method. Alloys underwent different degrees of deformation to assess their shape memory effect. Microstructural evaluations were conducted post-deformation to observe the internal structures of the alloys. The tensile tests revealed that shape recovery rates for deformation levels of 3%, 7%, 11%, and 15% were 68.1%, 44.2%, 31.7%, and 17.6%, respectively. Notably, the maximum recoverable deformation of the LDED-formed Fe-Mn-Si-based shape memory alloy reached 3.49%, surpassing the traditional deformation processing SMAs (<3%). The presence of a significant number of stacking faults was linked to the enhanced shape memory performance. The LDED technique demonstrates promising potential for the fabrication of Fe-Mn-Si SMAs, producing alloys with enhanced shape memory performance compared to traditionally processed SMAs. The study’s findings offer new insights and broaden the applicability of LDED in the field of SMAs.https://www.mdpi.com/1996-1944/17/1/131laser-directed energy deposition (LDED)Fe-Mn-Si-based shape memory alloystress-induced martensitemechanical propertiesshape memory properties |
| spellingShingle | Bing Liu Cong Yao Jingtao Kang Ruidi Li Pengda Niu Laser-Directed Energy Deposition of Fe-Mn-Si-Based Shape Memory Alloy: Microstructure, Mechanical Properties, and Shape Memory Properties Materials laser-directed energy deposition (LDED) Fe-Mn-Si-based shape memory alloy stress-induced martensite mechanical properties shape memory properties |
| title | Laser-Directed Energy Deposition of Fe-Mn-Si-Based Shape Memory Alloy: Microstructure, Mechanical Properties, and Shape Memory Properties |
| title_full | Laser-Directed Energy Deposition of Fe-Mn-Si-Based Shape Memory Alloy: Microstructure, Mechanical Properties, and Shape Memory Properties |
| title_fullStr | Laser-Directed Energy Deposition of Fe-Mn-Si-Based Shape Memory Alloy: Microstructure, Mechanical Properties, and Shape Memory Properties |
| title_full_unstemmed | Laser-Directed Energy Deposition of Fe-Mn-Si-Based Shape Memory Alloy: Microstructure, Mechanical Properties, and Shape Memory Properties |
| title_short | Laser-Directed Energy Deposition of Fe-Mn-Si-Based Shape Memory Alloy: Microstructure, Mechanical Properties, and Shape Memory Properties |
| title_sort | laser directed energy deposition of fe mn si based shape memory alloy microstructure mechanical properties and shape memory properties |
| topic | laser-directed energy deposition (LDED) Fe-Mn-Si-based shape memory alloy stress-induced martensite mechanical properties shape memory properties |
| url | https://www.mdpi.com/1996-1944/17/1/131 |
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