PSI - Issue 7

Gianni Nicoletto et al. / Procedia Structural Integrity 7 (2017) 133–140 Gianni Nicoletto/ Structural Integrity Procedia 00 (2017) 000–000

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Fig. 5 Influence of post fabrication heat treatment on fatigue behavior of heat treated and machined SLM Ti6Al4V

MACHINED

AS BUILT

Fig. 6 Influence of surface machining on fatigue behavior of heat treated HT1 SLM Ti6Al4V The present original fatigue results on SLM Ti6Al4V heat treated according to HT1 are now introduced in the plot of Fig. 7 to discuss different sets of data found in the literature: i) fatigue data of Ti64 produced in an EOS system and tested in rotating bending in the machined state after a HIP treatment, see Edwards and Ramulu (2014) ii) fatigue data of Ti64 produced by conventional process (i.e. wrought) and polished, see Mower and Long (2016) iii) scatter band of fatigue data for Ti64 produced conventionally but with different levels of surface finish, see Lütjering et al (2007).