Selective Laser Melting (SLM) process is an Additive Manufacturing (AM) technique that allows producing metallic parts of any kind of geometry with densities greater than 99.5%. Complex shapes lead however to notches with different radii of curvature that may reduce load bearing capacities. This work is aimed to assess the fatigue strength of Ti-6Al-4V blunt V-notched samples produced by SLM. Results were compared with those of the corresponding smooth samples and Environmental Scanning Electron Microscopy (ESEM) have been used to investigate the fracture surface of the broken samples in order to identify crack initiation points and fracture mechanisms. Finally, the strain energy density approach was used to evaluate the critical radius value. Despite the observed fatigue strength reduction induced by the notch, samples showed a sufficient low notch sensitivity that it was not possible to define a critical radius for the material analysed. © 2017 Elsevier Ltd

Fatigue strength of blunt V-notched specimens produced by selective laser melting of Ti-6Al-4V / Razavi, S. M. J.; Ferro, P.; Berto, Filippo; Torgersen, J.. - In: THEORETICAL AND APPLIED FRACTURE MECHANICS. - ISSN 0167-8442. - 97:(2018), pp. 376-384. [10.1016/j.tafmec.2017.06.021]

Fatigue strength of blunt V-notched specimens produced by selective laser melting of Ti-6Al-4V

Berto Filippo;
2018

Abstract

Selective Laser Melting (SLM) process is an Additive Manufacturing (AM) technique that allows producing metallic parts of any kind of geometry with densities greater than 99.5%. Complex shapes lead however to notches with different radii of curvature that may reduce load bearing capacities. This work is aimed to assess the fatigue strength of Ti-6Al-4V blunt V-notched samples produced by SLM. Results were compared with those of the corresponding smooth samples and Environmental Scanning Electron Microscopy (ESEM) have been used to investigate the fracture surface of the broken samples in order to identify crack initiation points and fracture mechanisms. Finally, the strain energy density approach was used to evaluate the critical radius value. Despite the observed fatigue strength reduction induced by the notch, samples showed a sufficient low notch sensitivity that it was not possible to define a critical radius for the material analysed. © 2017 Elsevier Ltd
2018
3D printers; aluminum alloys; fatigue of materials; fracture; melting; scanning electron microscopy; strain energy; ternary alloys, environmental scanning electron microscopies (ESEM); fracture mechanisms; load-bearing capacity; radii of curvature; selective laser melting; strain energy density; strain energy density approaches; v-notches; titanium alloys; additive manufacturing; blunt v-notch; fatigue; strain energy density; titanium alloy
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Fatigue strength of blunt V-notched specimens produced by selective laser melting of Ti-6Al-4V / Razavi, S. M. J.; Ferro, P.; Berto, Filippo; Torgersen, J.. - In: THEORETICAL AND APPLIED FRACTURE MECHANICS. - ISSN 0167-8442. - 97:(2018), pp. 376-384. [10.1016/j.tafmec.2017.06.021]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1654377
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