Direct Generation of High-Aspect-Ratio Structures of AISI 316L by Laser-Assisted Powder Deposition
The effect of process parameters and the orientation of the cladding layer on the mechanical properties of 316L stainless steel components manufactured by laser metal deposition (LMD) was investigated. High aspect-ratio walls were manufactured with layers of a 4.5 mm wide single-cladding track to st...
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MDPI AG
2020-12-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/24/5670 |
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| author | Piera Alvarez M. Ángeles Montealegre Francisco Cordovilla Ángel García-Beltrán Ignacio Angulo José Luis Ocaña |
| author_facet | Piera Alvarez M. Ángeles Montealegre Francisco Cordovilla Ángel García-Beltrán Ignacio Angulo José Luis Ocaña |
| author_sort | Piera Alvarez |
| collection | DOAJ |
| description | The effect of process parameters and the orientation of the cladding layer on the mechanical properties of 316L stainless steel components manufactured by laser metal deposition (LMD) was investigated. High aspect-ratio walls were manufactured with layers of a 4.5 mm wide single-cladding track to study the microstructure and mechanical properties along the length and the height of the wall. Samples for the tensile test (according to ASTM E-8M-04) were machined from the wall along both the direction of the layers and the direction perpendicular to them. Cross-sections of the LMD samples were analyzed by optical and scanning electron microscopy (SEM). The orientation of the growing grain was observed. It was associated with the thermal gradient through the building part. A homogeneous microstructure between consecutive layers and some degree of microporosity was observed by SEM. Uniaxial tension tests were performed on samples extracted from the wall in perpendicular and parallel directions. Results for ultimate tensile strength were similar in both cases and with the wrought material. The σ<sub>0.2</sub> were similar in both cases but slightly superior to the wrought material. |
| first_indexed | 2024-03-10T14:07:31Z |
| format | Article |
| id | doaj.art-20f1b360c6c64e18a57f165603764151 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T14:07:31Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-20f1b360c6c64e18a57f1656037641512023-11-21T00:28:47ZengMDPI AGMaterials1996-19442020-12-011324567010.3390/ma13245670Direct Generation of High-Aspect-Ratio Structures of AISI 316L by Laser-Assisted Powder DepositionPiera Alvarez0M. Ángeles Montealegre1Francisco Cordovilla2Ángel García-Beltrán3Ignacio Angulo4José Luis Ocaña5Ikergune, Inzu Group, San Antolín 3, 20870 Elgoibar, SpainTalens Systems, Inzu Group, Polígono Albitxuri 20, 20870 Elgoibar, SpainUPM Laser Centre, Escuela Técnica Superior de Ingenieros Industriales, Polytechnical University of Madrid, C./José Gutiérrez Abascal 2, 28006 Madrid, SpainUPM Laser Centre, Escuela Técnica Superior de Ingenieros Industriales, Polytechnical University of Madrid, C./José Gutiérrez Abascal 2, 28006 Madrid, SpainUPM Laser Centre, Escuela Técnica Superior de Ingenieros Industriales, Polytechnical University of Madrid, C./José Gutiérrez Abascal 2, 28006 Madrid, SpainUPM Laser Centre, Escuela Técnica Superior de Ingenieros Industriales, Polytechnical University of Madrid, C./José Gutiérrez Abascal 2, 28006 Madrid, SpainThe effect of process parameters and the orientation of the cladding layer on the mechanical properties of 316L stainless steel components manufactured by laser metal deposition (LMD) was investigated. High aspect-ratio walls were manufactured with layers of a 4.5 mm wide single-cladding track to study the microstructure and mechanical properties along the length and the height of the wall. Samples for the tensile test (according to ASTM E-8M-04) were machined from the wall along both the direction of the layers and the direction perpendicular to them. Cross-sections of the LMD samples were analyzed by optical and scanning electron microscopy (SEM). The orientation of the growing grain was observed. It was associated with the thermal gradient through the building part. A homogeneous microstructure between consecutive layers and some degree of microporosity was observed by SEM. Uniaxial tension tests were performed on samples extracted from the wall in perpendicular and parallel directions. Results for ultimate tensile strength were similar in both cases and with the wrought material. The σ<sub>0.2</sub> were similar in both cases but slightly superior to the wrought material.https://www.mdpi.com/1996-1944/13/24/5670laser metal deposition (LMD)additive manufacturingmechanical propertiestensile strength316L stainless steelmetallic powder |
| spellingShingle | Piera Alvarez M. Ángeles Montealegre Francisco Cordovilla Ángel García-Beltrán Ignacio Angulo José Luis Ocaña Direct Generation of High-Aspect-Ratio Structures of AISI 316L by Laser-Assisted Powder Deposition Materials laser metal deposition (LMD) additive manufacturing mechanical properties tensile strength 316L stainless steel metallic powder |
| title | Direct Generation of High-Aspect-Ratio Structures of AISI 316L by Laser-Assisted Powder Deposition |
| title_full | Direct Generation of High-Aspect-Ratio Structures of AISI 316L by Laser-Assisted Powder Deposition |
| title_fullStr | Direct Generation of High-Aspect-Ratio Structures of AISI 316L by Laser-Assisted Powder Deposition |
| title_full_unstemmed | Direct Generation of High-Aspect-Ratio Structures of AISI 316L by Laser-Assisted Powder Deposition |
| title_short | Direct Generation of High-Aspect-Ratio Structures of AISI 316L by Laser-Assisted Powder Deposition |
| title_sort | direct generation of high aspect ratio structures of aisi 316l by laser assisted powder deposition |
| topic | laser metal deposition (LMD) additive manufacturing mechanical properties tensile strength 316L stainless steel metallic powder |
| url | https://www.mdpi.com/1996-1944/13/24/5670 |
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