PSI - Issue 24

Jacopo De Nisi et al. / Procedia Structural Integrity 24 (2019) 541–558 Paolo Folgarait et al./ Structural Integrity Procedia 00 (2019) 000 – 000

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Fig. 11 . Yield Strength (UTS) for A1 group (STANDARD). Min value for horizontally and vertically fabricated specimens, as per EOS reference (Table 3). Horizontally fabricated maximum uncertainty as per EOS reference (Table 5), equivalent to B1 (Table 2).

Fig. 12 . Fracture elongation (El%) for A1 group (STANDARD). Min value for horizontally and vertically fabricated specimens, as per EOS reference (Table 5), equivalent to B1 (Table 2).

4. Summary and conclusions

Samples of different geometry and sections, made of virgin metal powder in 15-5 TM PH alloy (distributed by EOS with the commercial name of PH1) have been 3D printed on an EOS M290 equipment in both horizontal and vertical directions, divided in nine (9) quadrants (or positions), mechanically and metallurgically tested in their as-built condition and after solution heat treatments (with or without a previous solution annealing), varying ageing temperature and holding time. Results have been compared with data available from the literature ( Table 9 ) referred to hot rolled or forged parts (see Q. Yu et al. (2015) and R. Sri Rama Devi et al. (2013)) in the same alloy and chemical composition of used powders, applying a previous solution annealing treatment at 1040°C for 7hrs, then air cooling to RT, followed by ageing.