PSI - Issue 42

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ il l li t . i ir t. ŝ ŝ tructural Integrity rocedia 00 (2019) 000 – 000 Structural Integrity Procedia 00 (2019) 000 – 000

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Procedia Structural Integrity 42 (2022) 1436–1441

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© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the 23 European Conference on Fracture – ECF23 Abstract Additive manufacturing (AM) techniques offer significant advantages with respect to conventional manufacturing (CM) ones such as the realization of highly customized components both dealing with their geometry and their mechanical properties. An important advantage of AM is the significant reduction of wasted material with respect to CM. However, AM techniques, such as the powder bed fusion, involve during the production an amount of powder higher than that needed to realize the final component even if the excess of powder in not interested by the melting process and can be recovered and used again. However, it is obvious to expect that the new powder feedstock that include this reused powder has different morphology characteristics since it has been subjected to a thermal history in the building chamber. These changes in the material feedstock can results in a different morphology of defects and consequently in different fatigue properties even for AM components realized with the same design geometry and same process parameters. In the present study, the effect of the use of recycled powders on the fatigue properties of AM Ti6Al4V has been investigated by considering specimens realized from virgin powder and recycled powder. The specimens fracture surfaces are investigated to correlate the effect of the powder on fatigue properties with the effect on the defects’ morphology. © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23 Keywords: Fatigue properties; Additive Manufacturing; Recycling powder str ct iti e a fact ri ( ) tec i es ffer si ifica t a a ta es it res ect t c e ti al a fact ri ( ) es s c as t e realizati f i l c st ize c e ts t eali it t eir e etr a t eir ec a ical r erties. i rta t a a ta e f is t e si ifica t re cti f aste aterial it res ect t . e er, tec i es, s c as t e er e f si , i l e ri t e r cti a a t f er i er t a t at ee e t realize t e fi al c e t e e if t e e cess f er i t i tereste t e elti r cess a ca e rec ere a se a ai . e er, it is i s t e ect t at t e e er fee st c t at i cl e t is re se er as iffere t r l c aracteristics si ce it as ee s jecte t a t er al ist r i t e il i c a er. ese c a es i t e aterial fee st c ca res lts i a iffere t r l f efects a c se e tl i iffere t fati e r erties e e f r c e ts realize it t e sa e esi e etr a sa e r cess ara eters. I t e rese t st , t e effect f t e se f rec cle ers t e fati e r erties f i l as ee i esti ate c si eri s eci e s realize fr ir i er a rec cle er. e s eci e s fract re s rfaces are i esti ate t c rrelate t e effect f t e er fati e r erties it t e effect t e efects’ r l . 2020 The Aut rs. Published by Elsevier B.V. This is an open access article under t e - - lice se ( tt ://creati ec s. r /lice ses/ - c- / . /) Peer-review under responsibility of 23 European Conference on Fracture - ECF23 ey ords: atigue properties; dditive anufacturing; ecycling po der 23 European Conference on Fracture - ECF23 Effect of recycling powder on the fatigue properties of AM Ti6Al4V P. Foti a *, L.P. Mocanu b , S.M.J. Razavi a , C. Bellini b , R. Borrelli c , V. Di Cocco b , S. Francitti c , F. Iacoviello b , F. Berto a a Norwegian University of Science and Technology, MTP Gløshaugen, Richard Birkelands vei 2B, Trondheim 7491, Norway b University of Cassino and Southern Lazio, Department of Civil and Mechanical Engineering, Cassino, Italy c CIRA, Manufacturing Process on Metallic Materials Labs, Capua, Italy . ti a , . . anu b , S.M. . i a , . lli i b , . rr lli c , . i b , . r itti c , . I i ll b , . rt a a or egian niversity of Science and echnology, løshaugen, ichard irkelands vei 2 , rondhei 7491, or ay b niversity of assino and Southern azio, epart ent of ivil and echanical ngineering, assino, Italy c I , anufacturing rocess on etallic aterials abs, apua, Italy

* Corresponding author. E-mail address: pietro.foti@ntnu.no * orresponding author. - ail address: pietro.foti ntnu.no

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Peer-review under responsibility of 23 European Conference on Fracture - ECF23 er res si ilit f r ea fere ce eer-re ie

2452-3216 © 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the 23 European Conference on Fracture – ECF23 10.1016/j.prostr.2022.12.183