Investigation into the Performance of NiTi Shape Memory Alloy Wire Reinforced Sn-Bi Self-Healing Metal Matrix Composite
Self-healing materials have the potential to create a paradigm shift in the life cycle design of engineered structures, by changing the relation between material damage and structural failure, affecting structures’ lifetime, safety, and reliability. However, the knowledge of self-healing capabilitie...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-04-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/9/2970 |
| _version_ | 1797504129282605056 |
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| author | Nathan Salowitz Shobhit Misra Muhammad Istiaque Haider Marco Povolo Pradeep Rohatgi |
| author_facet | Nathan Salowitz Shobhit Misra Muhammad Istiaque Haider Marco Povolo Pradeep Rohatgi |
| author_sort | Nathan Salowitz |
| collection | DOAJ |
| description | Self-healing materials have the potential to create a paradigm shift in the life cycle design of engineered structures, by changing the relation between material damage and structural failure, affecting structures’ lifetime, safety, and reliability. However, the knowledge of self-healing capabilities in metallic materials is still in its infancy compared to other material systems because of challenges in the synthesis of organized and complex structures. This paper presents a study of a metal matrix composite system that was synthesized with an off-eutectic Tin (Sn)-Bismuth (Bi) alloy matrix, reinforced with Nickel–Titanium (NiTi) shape memory alloy (SMA) wires. The ability to close cracks, recover bulk geometry, and regenerate strength upon the application of heat was investigated. NiTi wires were etched and coated in flux before being incorporated into the matrix to prevent disbonding with the matrix. Samples were subjected to large deformations in a three-point bending setup. Subsequent thermo-mechanical testing of the composites confirmed the materials’ ability to restore their geometry and recover strength, without using any consumable components. Self-healing was accomplished through a combination of activation of the shape memory effect in the NiTi to recover the samples’ original macroscopic geometry, closing cracks, and melting of the eutectic material in the matrix alloy, which resealed the cracks. Subsequent testing indicated a 92% strength recovery. |
| first_indexed | 2024-03-10T04:00:16Z |
| format | Article |
| id | doaj.art-392d231589764674a5fa2cc3596894f6 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T04:00:16Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-392d231589764674a5fa2cc3596894f62023-11-23T08:36:05ZengMDPI AGMaterials1996-19442022-04-01159297010.3390/ma15092970Investigation into the Performance of NiTi Shape Memory Alloy Wire Reinforced Sn-Bi Self-Healing Metal Matrix CompositeNathan Salowitz0Shobhit Misra1Muhammad Istiaque Haider2Marco Povolo3Pradeep Rohatgi4Department of Mechanical Engineering, University of Wisconsin—Milwaukee, 3200 N Cramer Street, Milwaukee, WI 53211, USASlunca Engineers Private Limited, New Delhi 110091, IndiaDepartment of Mechanical Engineering, University of Wisconsin—Milwaukee, 3200 N Cramer Street, Milwaukee, WI 53211, USADepartment of Industrial Engineering, University of Bologna, 40132 Bologna, ItalyDepartment of Materials Science & Engineering, University of Wisconsin—Milwaukee, 3200 N Cramer Street, Milwaukee, WI 53211, USASelf-healing materials have the potential to create a paradigm shift in the life cycle design of engineered structures, by changing the relation between material damage and structural failure, affecting structures’ lifetime, safety, and reliability. However, the knowledge of self-healing capabilities in metallic materials is still in its infancy compared to other material systems because of challenges in the synthesis of organized and complex structures. This paper presents a study of a metal matrix composite system that was synthesized with an off-eutectic Tin (Sn)-Bismuth (Bi) alloy matrix, reinforced with Nickel–Titanium (NiTi) shape memory alloy (SMA) wires. The ability to close cracks, recover bulk geometry, and regenerate strength upon the application of heat was investigated. NiTi wires were etched and coated in flux before being incorporated into the matrix to prevent disbonding with the matrix. Samples were subjected to large deformations in a three-point bending setup. Subsequent thermo-mechanical testing of the composites confirmed the materials’ ability to restore their geometry and recover strength, without using any consumable components. Self-healing was accomplished through a combination of activation of the shape memory effect in the NiTi to recover the samples’ original macroscopic geometry, closing cracks, and melting of the eutectic material in the matrix alloy, which resealed the cracks. Subsequent testing indicated a 92% strength recovery.https://www.mdpi.com/1996-1944/15/9/2970metal–matrix composites (MMCs)off-eutectic solder alloysfiber–matrix interfaceshape restorationself-healingshape memory alloys (SMAs) |
| spellingShingle | Nathan Salowitz Shobhit Misra Muhammad Istiaque Haider Marco Povolo Pradeep Rohatgi Investigation into the Performance of NiTi Shape Memory Alloy Wire Reinforced Sn-Bi Self-Healing Metal Matrix Composite Materials metal–matrix composites (MMCs) off-eutectic solder alloys fiber–matrix interface shape restoration self-healing shape memory alloys (SMAs) |
| title | Investigation into the Performance of NiTi Shape Memory Alloy Wire Reinforced Sn-Bi Self-Healing Metal Matrix Composite |
| title_full | Investigation into the Performance of NiTi Shape Memory Alloy Wire Reinforced Sn-Bi Self-Healing Metal Matrix Composite |
| title_fullStr | Investigation into the Performance of NiTi Shape Memory Alloy Wire Reinforced Sn-Bi Self-Healing Metal Matrix Composite |
| title_full_unstemmed | Investigation into the Performance of NiTi Shape Memory Alloy Wire Reinforced Sn-Bi Self-Healing Metal Matrix Composite |
| title_short | Investigation into the Performance of NiTi Shape Memory Alloy Wire Reinforced Sn-Bi Self-Healing Metal Matrix Composite |
| title_sort | investigation into the performance of niti shape memory alloy wire reinforced sn bi self healing metal matrix composite |
| topic | metal–matrix composites (MMCs) off-eutectic solder alloys fiber–matrix interface shape restoration self-healing shape memory alloys (SMAs) |
| url | https://www.mdpi.com/1996-1944/15/9/2970 |
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