Fatigue Crack Growth in Maraging Steel Obtained by Selective Laser Melting
Selective Laser Melting (SLM) is an additive manufacturing technology, ideal for the production of complex-shaped components. Design against fatigue is fundamental in the presence of cyclic loads, particularly for these materials which typically have significant porosity, high surface roughness and...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-10-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/9/20/4412 |
| _version_ | 1818041612186419200 |
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| author | Fernando Antunes Luís Santos Carlos Capela José Ferreira José Costa Joel Jesus Pedro Prates |
| author_facet | Fernando Antunes Luís Santos Carlos Capela José Ferreira José Costa Joel Jesus Pedro Prates |
| author_sort | Fernando Antunes |
| collection | DOAJ |
| description | Selective Laser Melting (SLM) is an additive manufacturing technology, ideal for the production of complex-shaped components. Design against fatigue is fundamental in the presence of cyclic loads, particularly for these materials which typically have significant porosity, high surface roughness and residual stresses. The main objective here is to study fatigue crack growth (FCG) in the 18Ni300 steel obtained by SLM. Typical da/dN-ΔK curves were obtained in C(T) specimens, indicating that cyclic plastic deformation may be the controlling mechanism. A complementary analysis, based on plastic CTOD range, showed a relatively low level of crack tip plastic deformation, and consequently a reduced level of plasticity induced crack closure. The curve da/dN versus plastic CTOD range is clearly above the curves for other materials. |
| first_indexed | 2024-12-10T08:33:11Z |
| format | Article |
| id | doaj.art-17f63979a94e4fe3973cecb734e26209 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-10T08:33:11Z |
| publishDate | 2019-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-17f63979a94e4fe3973cecb734e262092022-12-22T01:56:02ZengMDPI AGApplied Sciences2076-34172019-10-01920441210.3390/app9204412app9204412Fatigue Crack Growth in Maraging Steel Obtained by Selective Laser MeltingFernando Antunes0Luís Santos1Carlos Capela2José Ferreira3José Costa4Joel Jesus5Pedro Prates6CEMMPRE, Department of Mechanical Engineering, University of Coimbra, 3030-788 Coimbra, PortugalDepartment of Mechanical Engineering, Instituto Politécnico de Leiria, ESTG, 2411-901 Leiria, PortugalDepartment of Mechanical Engineering, Instituto Politécnico de Leiria, ESTG, 2411-901 Leiria, PortugalCEMMPRE, Department of Mechanical Engineering, University of Coimbra, 3030-788 Coimbra, PortugalCEMMPRE, Department of Mechanical Engineering, University of Coimbra, 3030-788 Coimbra, PortugalCEMMPRE, Department of Mechanical Engineering, University of Coimbra, 3030-788 Coimbra, PortugalCEMMPRE, Department of Mechanical Engineering, University of Coimbra, 3030-788 Coimbra, PortugalSelective Laser Melting (SLM) is an additive manufacturing technology, ideal for the production of complex-shaped components. Design against fatigue is fundamental in the presence of cyclic loads, particularly for these materials which typically have significant porosity, high surface roughness and residual stresses. The main objective here is to study fatigue crack growth (FCG) in the 18Ni300 steel obtained by SLM. Typical da/dN-ΔK curves were obtained in C(T) specimens, indicating that cyclic plastic deformation may be the controlling mechanism. A complementary analysis, based on plastic CTOD range, showed a relatively low level of crack tip plastic deformation, and consequently a reduced level of plasticity induced crack closure. The curve da/dN versus plastic CTOD range is clearly above the curves for other materials.https://www.mdpi.com/2076-3417/9/20/4412fatigue crack growthselective laser melting (slm)crack tip opening displacement (ctod)crack tip plastic deformationδk |
| spellingShingle | Fernando Antunes Luís Santos Carlos Capela José Ferreira José Costa Joel Jesus Pedro Prates Fatigue Crack Growth in Maraging Steel Obtained by Selective Laser Melting Applied Sciences fatigue crack growth selective laser melting (slm) crack tip opening displacement (ctod) crack tip plastic deformation δk |
| title | Fatigue Crack Growth in Maraging Steel Obtained by Selective Laser Melting |
| title_full | Fatigue Crack Growth in Maraging Steel Obtained by Selective Laser Melting |
| title_fullStr | Fatigue Crack Growth in Maraging Steel Obtained by Selective Laser Melting |
| title_full_unstemmed | Fatigue Crack Growth in Maraging Steel Obtained by Selective Laser Melting |
| title_short | Fatigue Crack Growth in Maraging Steel Obtained by Selective Laser Melting |
| title_sort | fatigue crack growth in maraging steel obtained by selective laser melting |
| topic | fatigue crack growth selective laser melting (slm) crack tip opening displacement (ctod) crack tip plastic deformation δk |
| url | https://www.mdpi.com/2076-3417/9/20/4412 |
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