Laser re-melt technique for laser additive repair of narrow rectangular cracks in Grade 5 Titanium Alloy (Ti-6Al-4V)
Groove inaccessibility, top groove powder impedance, irregular sidewall powder delivery and lack of sidewall vertical irradiation have been reported as major limitations for the use of Laser Additive Technology (LAT) for narrow rectangular crack repair applications. As a result, most reported repair...
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Trans Tech Publications
2021
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| Online Access: | http://hdl.handle.net/11408/4614 |
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| author | Marazani, Tawanda Madyira, Daniel. M. Akinlab, Esther. T. |
| author_facet | Marazani, Tawanda Madyira, Daniel. M. Akinlab, Esther. T. |
| author_sort | Marazani, Tawanda |
| collection | DSpace |
| description | Groove inaccessibility, top groove powder impedance, irregular sidewall powder delivery and lack of sidewall vertical irradiation have been reported as major limitations for the use of Laser Additive Technology (LAT) for narrow rectangular crack repair applications. As a result, most reported repair attempts were concluded unsuccessful. In the present work, a multi-track laser re-melt technique was developed for the repair of narrow rectangular cracks of sizes 2 and 3 mm, both 5 mm deep on 7 mm thick Ti-6Al-4V plates. The laser re-melt technique was carried out at controlled laser power, focal length, spot size, powder feed rate, gas flow rate and scanning speed. The repaired substrates were evaluated for defects through optical microscopy (OM) and scanning electron microscopy (SEM). The obtained results showed densely fused defect-free repaired substrates with good evolving microstructure |
| format | Article |
| id | ir-11408-4614 |
| institution | My University |
| language | English |
| publishDate | 2021 |
| publisher | Trans Tech Publications |
| record_format | dspace |
| spelling | ir-11408-46142022-06-27T13:49:06Z Laser re-melt technique for laser additive repair of narrow rectangular cracks in Grade 5 Titanium Alloy (Ti-6Al-4V) Marazani, Tawanda Madyira, Daniel. M. Akinlab, Esther. T. Laser additive technology Laser re-melt Microstructure Narrow rectangular grooves Groove inaccessibility, top groove powder impedance, irregular sidewall powder delivery and lack of sidewall vertical irradiation have been reported as major limitations for the use of Laser Additive Technology (LAT) for narrow rectangular crack repair applications. As a result, most reported repair attempts were concluded unsuccessful. In the present work, a multi-track laser re-melt technique was developed for the repair of narrow rectangular cracks of sizes 2 and 3 mm, both 5 mm deep on 7 mm thick Ti-6Al-4V plates. The laser re-melt technique was carried out at controlled laser power, focal length, spot size, powder feed rate, gas flow rate and scanning speed. The repaired substrates were evaluated for defects through optical microscopy (OM) and scanning electron microscopy (SEM). The obtained results showed densely fused defect-free repaired substrates with good evolving microstructure 2021-11-25T14:05:26Z 2021-11-25T14:05:26Z 2019 Article 1662-9795 doi:10.4028/www.scientific.net/KEM.796.129 http://hdl.handle.net/11408/4614 en Key Engineering Materials;Vol. 796: p. 129-136 open Trans Tech Publications |
| spellingShingle | Laser additive technology Laser re-melt Microstructure Narrow rectangular grooves Marazani, Tawanda Madyira, Daniel. M. Akinlab, Esther. T. Laser re-melt technique for laser additive repair of narrow rectangular cracks in Grade 5 Titanium Alloy (Ti-6Al-4V) |
| title | Laser re-melt technique for laser additive repair of narrow rectangular cracks in Grade 5 Titanium Alloy (Ti-6Al-4V) |
| title_full | Laser re-melt technique for laser additive repair of narrow rectangular cracks in Grade 5 Titanium Alloy (Ti-6Al-4V) |
| title_fullStr | Laser re-melt technique for laser additive repair of narrow rectangular cracks in Grade 5 Titanium Alloy (Ti-6Al-4V) |
| title_full_unstemmed | Laser re-melt technique for laser additive repair of narrow rectangular cracks in Grade 5 Titanium Alloy (Ti-6Al-4V) |
| title_short | Laser re-melt technique for laser additive repair of narrow rectangular cracks in Grade 5 Titanium Alloy (Ti-6Al-4V) |
| title_sort | laser re-melt technique for laser additive repair of narrow rectangular cracks in grade 5 titanium alloy (ti-6al-4v) |
| topic | Laser additive technology Laser re-melt Microstructure Narrow rectangular grooves |
| url | http://hdl.handle.net/11408/4614 |
| work_keys_str_mv | AT marazanitawanda laserremelttechniqueforlaseradditiverepairofnarrowrectangularcracksingrade5titaniumalloyti6al4v AT madyiradanielm laserremelttechniqueforlaseradditiverepairofnarrowrectangularcracksingrade5titaniumalloyti6al4v AT akinlabesthert laserremelttechniqueforlaseradditiverepairofnarrowrectangularcracksingrade5titaniumalloyti6al4v |