Porous γ-TiAl Structures Fabricated by Electron Beam Melting Process
Porous metal structures have many benefits over fully dense structures for use in bio-implants. The designs of porous structures can be made more sophisticated by altering their pore volume and strut orientation. Porous structures made from biocompatible materials such as titanium and its alloys can...
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| Format: | Article |
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MDPI AG
2016-01-01
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| Series: | Metals |
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| Online Access: | http://www.mdpi.com/2075-4701/6/1/25 |
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| author | Ashfaq Mohammad Abdulrahman M. Alahmari Khaja Moiduddin Muneer Khan Mohammed Abdulrahman Alomar Ravi Kottan Renganayagalu |
| author_facet | Ashfaq Mohammad Abdulrahman M. Alahmari Khaja Moiduddin Muneer Khan Mohammed Abdulrahman Alomar Ravi Kottan Renganayagalu |
| author_sort | Ashfaq Mohammad |
| collection | DOAJ |
| description | Porous metal structures have many benefits over fully dense structures for use in bio-implants. The designs of porous structures can be made more sophisticated by altering their pore volume and strut orientation. Porous structures made from biocompatible materials such as titanium and its alloys can be produced using electron-beam melting, and recent reports have shown the biocompatibility of titanium aluminide (γ-TiAl). In the present work, we produced porous γ-TiAl structures by electron-beam melting, incorporating varying pore volumes. To achieve this, the individual pore dimensions were kept constant, and only the strut thickness was altered. Thus, for the highest pore volume of ~77%, the struts had to be as thin as half a millimeter. To accomplish such fine struts, we used various beam currents and scan strategies. Microscopy showed that selecting a proper scan strategy was most important in producing these fine struts. Microcomputed tomography revealed no major gaps in the struts, and the fine struts displayed compressive stiffness similar to that of natural bone. The characteristics of these highly-porous structures suggest their promise for use in bio-implants. |
| first_indexed | 2024-04-12T21:14:02Z |
| format | Article |
| id | doaj.art-a503adcf03c24f14ab77df6f80d56a79 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-04-12T21:14:02Z |
| publishDate | 2016-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-a503adcf03c24f14ab77df6f80d56a792022-12-22T03:16:31ZengMDPI AGMetals2075-47012016-01-01612510.3390/met6010025met6010025Porous γ-TiAl Structures Fabricated by Electron Beam Melting ProcessAshfaq Mohammad0Abdulrahman M. Alahmari1Khaja Moiduddin2Muneer Khan Mohammed3Abdulrahman Alomar4Ravi Kottan Renganayagalu5Princess Fatima Alnijiris’s Research Chair for Advanced Manufacturing Technology (FARCAMT), Advanced Manufacturing Institute, King Saud University, Riyadh 11421, Saudi ArabiaPrincess Fatima Alnijiris’s Research Chair for Advanced Manufacturing Technology (FARCAMT), Advanced Manufacturing Institute, King Saud University, Riyadh 11421, Saudi ArabiaIndustrial Engineering Department, College of Engineering, King Saud University, Riyadh 11421, Saudi ArabiaPrincess Fatima Alnijiris’s Research Chair for Advanced Manufacturing Technology (FARCAMT), Advanced Manufacturing Institute, King Saud University, Riyadh 11421, Saudi ArabiaIndustrial Engineering Department, College of Engineering, King Saud University, Riyadh 11421, Saudi ArabiaStructural Nanomaterials Laboratory, PSG Institute of Advanced Studies, Coimbatore 641004, IndiaPorous metal structures have many benefits over fully dense structures for use in bio-implants. The designs of porous structures can be made more sophisticated by altering their pore volume and strut orientation. Porous structures made from biocompatible materials such as titanium and its alloys can be produced using electron-beam melting, and recent reports have shown the biocompatibility of titanium aluminide (γ-TiAl). In the present work, we produced porous γ-TiAl structures by electron-beam melting, incorporating varying pore volumes. To achieve this, the individual pore dimensions were kept constant, and only the strut thickness was altered. Thus, for the highest pore volume of ~77%, the struts had to be as thin as half a millimeter. To accomplish such fine struts, we used various beam currents and scan strategies. Microscopy showed that selecting a proper scan strategy was most important in producing these fine struts. Microcomputed tomography revealed no major gaps in the struts, and the fine struts displayed compressive stiffness similar to that of natural bone. The characteristics of these highly-porous structures suggest their promise for use in bio-implants.http://www.mdpi.com/2075-4701/6/1/25additive manufacturingelectron beam meltingtitanium aluminidesporous structuresbio-implantscompressive stiffness |
| spellingShingle | Ashfaq Mohammad Abdulrahman M. Alahmari Khaja Moiduddin Muneer Khan Mohammed Abdulrahman Alomar Ravi Kottan Renganayagalu Porous γ-TiAl Structures Fabricated by Electron Beam Melting Process Metals additive manufacturing electron beam melting titanium aluminides porous structures bio-implants compressive stiffness |
| title | Porous γ-TiAl Structures Fabricated by Electron Beam Melting Process |
| title_full | Porous γ-TiAl Structures Fabricated by Electron Beam Melting Process |
| title_fullStr | Porous γ-TiAl Structures Fabricated by Electron Beam Melting Process |
| title_full_unstemmed | Porous γ-TiAl Structures Fabricated by Electron Beam Melting Process |
| title_short | Porous γ-TiAl Structures Fabricated by Electron Beam Melting Process |
| title_sort | porous γ tial structures fabricated by electron beam melting process |
| topic | additive manufacturing electron beam melting titanium aluminides porous structures bio-implants compressive stiffness |
| url | http://www.mdpi.com/2075-4701/6/1/25 |
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