Elucidating the relations between monotonic and fatigue properties of laser powder bed fusion stainless steel 316L
The laser powder bed fusion (L-PBF) technique builds parts with higher static strength than the conventional manufacturing processes through the formation of ultrafine grains. However, its fatigue endurance strength σf does not match the increased monotonic tensile strength σb. This work examines th...
| Principais autores: | , , , , , , |
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| Outros Autores: | |
| Formato: | Journal Article |
| Idioma: | English |
| Publicado em: |
2020
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| Assuntos: | |
| Acesso em linha: | https://hdl.handle.net/10356/139546 |
| _version_ | 1826120651463720960 |
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| author | Zhang, Meng Sun, Chen-Nan Zhang, Xiang Goh, Phoi Chin Wei, Jun Li, Hua Hardacre, David |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Zhang, Meng Sun, Chen-Nan Zhang, Xiang Goh, Phoi Chin Wei, Jun Li, Hua Hardacre, David |
| author_sort | Zhang, Meng |
| collection | NTU |
| description | The laser powder bed fusion (L-PBF) technique builds parts with higher static strength than the conventional manufacturing processes through the formation of ultrafine grains. However, its fatigue endurance strength σf does not match the increased monotonic tensile strength σb. This work examines the monotonic and fatigue properties of as-built and heat-treated L-PBF stainless steel 316L. It was found that the general linear relation σf = mσb for describing conventional ferrous materials is not applicable to L-PBF parts because of the influence of porosity. Instead, the ductility parameter correlated linearly with fatigue strength and was proposed as the new fatigue assessment criterion for porous L-PBF parts. Annealed parts conformed to the strength-ductility trade-off. Fatigue resistance was reduced at short lives, but the effect was partially offset by the higher ductility such that comparing with an as-built part of equivalent monotonic strength, the heat-treated parts were more fatigue resistant. |
| first_indexed | 2024-10-01T05:20:15Z |
| format | Journal Article |
| id | ntu-10356/139546 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:20:15Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1395462020-05-20T05:06:39Z Elucidating the relations between monotonic and fatigue properties of laser powder bed fusion stainless steel 316L Zhang, Meng Sun, Chen-Nan Zhang, Xiang Goh, Phoi Chin Wei, Jun Li, Hua Hardacre, David School of Mechanical and Aerospace Engineering Singapore Centre for 3D Printing Singapore Institute of Manufacturing Technology Engineering::Mechanical engineering Laser Powder Bed Fusion Monotonic The laser powder bed fusion (L-PBF) technique builds parts with higher static strength than the conventional manufacturing processes through the formation of ultrafine grains. However, its fatigue endurance strength σf does not match the increased monotonic tensile strength σb. This work examines the monotonic and fatigue properties of as-built and heat-treated L-PBF stainless steel 316L. It was found that the general linear relation σf = mσb for describing conventional ferrous materials is not applicable to L-PBF parts because of the influence of porosity. Instead, the ductility parameter correlated linearly with fatigue strength and was proposed as the new fatigue assessment criterion for porous L-PBF parts. Annealed parts conformed to the strength-ductility trade-off. Fatigue resistance was reduced at short lives, but the effect was partially offset by the higher ductility such that comparing with an as-built part of equivalent monotonic strength, the heat-treated parts were more fatigue resistant. EDB (Economic Devt. Board, S’pore) 2020-05-20T05:06:39Z 2020-05-20T05:06:39Z 2017 Journal Article Zhang, M., Sun, C.-N., Zhang, X., Goh, P. C., Wei, J., Li, H., & Hardacre, D. (2018). Elucidating the relations between monotonic and fatigue properties of laser powder bed fusion stainless steel 316L, JOM, 70(3), 390-395. doi:10.1007/s11837-017-2640-z 1047-4838 https://hdl.handle.net/10356/139546 10.1007/s11837-017-2640-z 2-s2.0-85032829881 3 70 390 395 en JOM © 2017 The Minerals, Metals & Materials Society. All rights reserved. |
| spellingShingle | Engineering::Mechanical engineering Laser Powder Bed Fusion Monotonic Zhang, Meng Sun, Chen-Nan Zhang, Xiang Goh, Phoi Chin Wei, Jun Li, Hua Hardacre, David Elucidating the relations between monotonic and fatigue properties of laser powder bed fusion stainless steel 316L |
| title | Elucidating the relations between monotonic and fatigue properties of laser powder bed fusion stainless steel 316L |
| title_full | Elucidating the relations between monotonic and fatigue properties of laser powder bed fusion stainless steel 316L |
| title_fullStr | Elucidating the relations between monotonic and fatigue properties of laser powder bed fusion stainless steel 316L |
| title_full_unstemmed | Elucidating the relations between monotonic and fatigue properties of laser powder bed fusion stainless steel 316L |
| title_short | Elucidating the relations between monotonic and fatigue properties of laser powder bed fusion stainless steel 316L |
| title_sort | elucidating the relations between monotonic and fatigue properties of laser powder bed fusion stainless steel 316l |
| topic | Engineering::Mechanical engineering Laser Powder Bed Fusion Monotonic |
| url | https://hdl.handle.net/10356/139546 |
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