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Title: | Fatigue Crack Growth in Maraging Steel Obtained by Selective Laser Melting | Authors: | Antunes, Fernando Santos, Luís Capela, Carlos Ferreira, José A. M. Costa, José Jesus, Joel de Prates, Pedro |
Keywords: | fatigue crack growth; Selective Laser Melting (SLM); Crack tip Opening Displacement (CTOD); crack tip plastic deformation; DK | Issue Date: | 2019 | Publisher: | MDPI | Project: | project Hibsilaser, funded by the European Regional Development Fund (FEDER), through the Portugal-2020 program (PT2020), under the Regional Operational Program of the Center (CENTRO-01-0145-FEDER-028789) and the Foundation for Science and Technology IP/MCTES through national funds (PIDDAC) | Serial title, monograph or event: | Applied Sciences (Switzerland) | Volume: | 9 | Issue: | 20 | Abstract: | 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-DK 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. | URI: | https://hdl.handle.net/10316/106816 | ISSN: | 2076-3417 | DOI: | 10.3390/app9204412 | Rights: | openAccess |
Appears in Collections: | I&D CEMMPRE - Artigos em Revistas Internacionais |
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