Experimental and numerical investigation of 17–4PH stainless steel fabricated by laser powder bed fusion and hot isostatic pressing
Meticulous design and optimization of additive manufacturing (AM) are essential for obtaining high-quality metallic products, particularly using laser powder bed fusion (L-PBF). However, its potential in applications is limited because of the lack of understanding of AM. This makes the process param...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2021-01-01
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| Series: | Materials Research Express |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2053-1591/ac2b55 |
| _version_ | 1827869183151439872 |
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| author | Jaehoon Bae Min-kyeom Kim Eunyoung Oh Kyung-Tae Yang Jonghwan Suhr |
| author_facet | Jaehoon Bae Min-kyeom Kim Eunyoung Oh Kyung-Tae Yang Jonghwan Suhr |
| author_sort | Jaehoon Bae |
| collection | DOAJ |
| description | Meticulous design and optimization of additive manufacturing (AM) are essential for obtaining high-quality metallic products, particularly using laser powder bed fusion (L-PBF). However, its potential in applications is limited because of the lack of understanding of AM. This makes the process parameter optimization time and cost-consuming. Here, the L-PBF process is employed to minimize defects and enhance the mechanical properties of 17–4PH stainless steel specimens, coupled with modeling. The optimal manufacturing parameters were determined by evaluating the relative densities of the as-built parts and thermal deformation. Either high or low energy densities resulted in high porosity and a higher energy density results in greater thermal deformation, attributed to the high mismatch in thermal expansion, while the surface roughness of as-built products is not as good as commercially available products. The hot isostatic pressing process improved the mechanical properties of the printed product by reducing the porosity and recrystallizing microstructures. |
| first_indexed | 2024-03-12T15:42:20Z |
| format | Article |
| id | doaj.art-9e009de4693f4fadb08a69a2bba32442 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:42:20Z |
| publishDate | 2021-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-9e009de4693f4fadb08a69a2bba324422023-08-09T15:56:03ZengIOP PublishingMaterials Research Express2053-15912021-01-0181010651210.1088/2053-1591/ac2b55Experimental and numerical investigation of 17–4PH stainless steel fabricated by laser powder bed fusion and hot isostatic pressingJaehoon Bae0Min-kyeom Kim1Eunyoung Oh2Kyung-Tae Yang3Jonghwan Suhr4https://orcid.org/0000-0003-3491-5738Department of Mechanical Engineering, Sungkyunkwan University , 2066, Seobu-ro, Jangan-gu, Gyeonggi-do, Republic of Korea; Korea Military Academy, 574, Hwarang-ro, Nowon-gu, Seoul, Republic of KoreaDepartment of Mechanical Engineering, Sungkyunkwan University , 2066, Seobu-ro, Jangan-gu, Gyeonggi-do, Republic of KoreaDepartment of Mechanical Engineering, Sungkyunkwan University , 2066, Seobu-ro, Jangan-gu, Gyeonggi-do, Republic of KoreaDepartment of Mechanical Engineering, Sungkyunkwan University , 2066, Seobu-ro, Jangan-gu, Gyeonggi-do, Republic of Korea; IT Development Division, LG Electronics, 10, Magokjungang 10-ro, Gangseo-gu, Seoul 07796, Republic of KoreaDepartment of Mechanical Engineering, Sungkyunkwan University , 2066, Seobu-ro, Jangan-gu, Gyeonggi-do, Republic of KoreaMeticulous design and optimization of additive manufacturing (AM) are essential for obtaining high-quality metallic products, particularly using laser powder bed fusion (L-PBF). However, its potential in applications is limited because of the lack of understanding of AM. This makes the process parameter optimization time and cost-consuming. Here, the L-PBF process is employed to minimize defects and enhance the mechanical properties of 17–4PH stainless steel specimens, coupled with modeling. The optimal manufacturing parameters were determined by evaluating the relative densities of the as-built parts and thermal deformation. Either high or low energy densities resulted in high porosity and a higher energy density results in greater thermal deformation, attributed to the high mismatch in thermal expansion, while the surface roughness of as-built products is not as good as commercially available products. The hot isostatic pressing process improved the mechanical properties of the printed product by reducing the porosity and recrystallizing microstructures.https://doi.org/10.1088/2053-1591/ac2b55laser powder bed fusion17–4PH stainless steelprocess analysisthermomechanical analysisthermal deformationporosity |
| spellingShingle | Jaehoon Bae Min-kyeom Kim Eunyoung Oh Kyung-Tae Yang Jonghwan Suhr Experimental and numerical investigation of 17–4PH stainless steel fabricated by laser powder bed fusion and hot isostatic pressing Materials Research Express laser powder bed fusion 17–4PH stainless steel process analysis thermomechanical analysis thermal deformation porosity |
| title | Experimental and numerical investigation of 17–4PH stainless steel fabricated by laser powder bed fusion and hot isostatic pressing |
| title_full | Experimental and numerical investigation of 17–4PH stainless steel fabricated by laser powder bed fusion and hot isostatic pressing |
| title_fullStr | Experimental and numerical investigation of 17–4PH stainless steel fabricated by laser powder bed fusion and hot isostatic pressing |
| title_full_unstemmed | Experimental and numerical investigation of 17–4PH stainless steel fabricated by laser powder bed fusion and hot isostatic pressing |
| title_short | Experimental and numerical investigation of 17–4PH stainless steel fabricated by laser powder bed fusion and hot isostatic pressing |
| title_sort | experimental and numerical investigation of 17 4ph stainless steel fabricated by laser powder bed fusion and hot isostatic pressing |
| topic | laser powder bed fusion 17–4PH stainless steel process analysis thermomechanical analysis thermal deformation porosity |
| url | https://doi.org/10.1088/2053-1591/ac2b55 |
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