Optimizing Laser Powder Bed Fusion Parameters for IN-738LC by Response Surface Method
A method to find the optimum process parameters for manufacturing nickel-based superalloy Inconel 738LC by laser powder bed fusion (LPBF) technology is presented. This material is known to form cracks during its processing by LPBF technology; thus, process parameters have to be optimized to get a hi...
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| Format: | Article |
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MDPI AG
2020-10-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/21/4879 |
| _version_ | 1797549310507745280 |
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| author | Mireia Vilanova Rubén Escribano-García Teresa Guraya Maria San Sebastian |
| author_facet | Mireia Vilanova Rubén Escribano-García Teresa Guraya Maria San Sebastian |
| author_sort | Mireia Vilanova |
| collection | DOAJ |
| description | A method to find the optimum process parameters for manufacturing nickel-based superalloy Inconel 738LC by laser powder bed fusion (LPBF) technology is presented. This material is known to form cracks during its processing by LPBF technology; thus, process parameters have to be optimized to get a high quality product. In this work, the objective of the optimization was to obtain samples with fewer pores and cracks. A design of experiments (DoE) technique was implemented to define the reduced set of samples. Each sample was manufactured by LPBF with a specific combination of laser power, laser scan speed, hatch distance and scan strategy parameters. Using the porosity and crack density results obtained from the DoE samples, quadratic models were fitted, which allowed identifying the optimal working point by applying the response surface method (RSM). Finally, five samples with the predicted optimal processing parameters were fabricated. The examination of these samples showed that it was possible to manufacture IN738LC samples free of cracks and with a porosity percentage below 0.1%. Therefore, it was demonstrated that RSM is suitable for obtaining optimum process parameters for IN738LC alloy manufacturing by LPBF technology. |
| first_indexed | 2024-03-10T15:12:52Z |
| format | Article |
| id | doaj.art-5113e190267142f0ba2fb1633d4edb51 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T15:12:52Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-5113e190267142f0ba2fb1633d4edb512023-11-20T19:12:28ZengMDPI AGMaterials1996-19442020-10-011321487910.3390/ma13214879Optimizing Laser Powder Bed Fusion Parameters for IN-738LC by Response Surface MethodMireia Vilanova0Rubén Escribano-García1Teresa Guraya2Maria San Sebastian3LORTEK Technological Centre, Basque Research and Technology Alliance (BRTA), Arranomendia Kalea 4A, 20240 Ordizia, SpainLORTEK Technological Centre, Basque Research and Technology Alliance (BRTA), Arranomendia Kalea 4A, 20240 Ordizia, SpainDepartment of Mining and Metallurgical Engineering and Materials Science, University of the Basque Country UPV/EHU, Rafael Moreno “Pitxitxi”, 2, 48013 Bilbao, SpainLORTEK Technological Centre, Basque Research and Technology Alliance (BRTA), Arranomendia Kalea 4A, 20240 Ordizia, SpainA method to find the optimum process parameters for manufacturing nickel-based superalloy Inconel 738LC by laser powder bed fusion (LPBF) technology is presented. This material is known to form cracks during its processing by LPBF technology; thus, process parameters have to be optimized to get a high quality product. In this work, the objective of the optimization was to obtain samples with fewer pores and cracks. A design of experiments (DoE) technique was implemented to define the reduced set of samples. Each sample was manufactured by LPBF with a specific combination of laser power, laser scan speed, hatch distance and scan strategy parameters. Using the porosity and crack density results obtained from the DoE samples, quadratic models were fitted, which allowed identifying the optimal working point by applying the response surface method (RSM). Finally, five samples with the predicted optimal processing parameters were fabricated. The examination of these samples showed that it was possible to manufacture IN738LC samples free of cracks and with a porosity percentage below 0.1%. Therefore, it was demonstrated that RSM is suitable for obtaining optimum process parameters for IN738LC alloy manufacturing by LPBF technology.https://www.mdpi.com/1996-1944/13/21/4879laser powder bed fusion (LPBF)Inconel 738LCresponse surface method (RSM)process parameter optimizationcracking |
| spellingShingle | Mireia Vilanova Rubén Escribano-García Teresa Guraya Maria San Sebastian Optimizing Laser Powder Bed Fusion Parameters for IN-738LC by Response Surface Method Materials laser powder bed fusion (LPBF) Inconel 738LC response surface method (RSM) process parameter optimization cracking |
| title | Optimizing Laser Powder Bed Fusion Parameters for IN-738LC by Response Surface Method |
| title_full | Optimizing Laser Powder Bed Fusion Parameters for IN-738LC by Response Surface Method |
| title_fullStr | Optimizing Laser Powder Bed Fusion Parameters for IN-738LC by Response Surface Method |
| title_full_unstemmed | Optimizing Laser Powder Bed Fusion Parameters for IN-738LC by Response Surface Method |
| title_short | Optimizing Laser Powder Bed Fusion Parameters for IN-738LC by Response Surface Method |
| title_sort | optimizing laser powder bed fusion parameters for in 738lc by response surface method |
| topic | laser powder bed fusion (LPBF) Inconel 738LC response surface method (RSM) process parameter optimization cracking |
| url | https://www.mdpi.com/1996-1944/13/21/4879 |
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