PSI - Issue 42

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

www.elsevier.com/locate/procedia .elsevier.co /locate/procedia

Procedia Structural Integrity 42 (2022) 1008–1016

© 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 (VHCF) an essential design criterion. The 316L stainless steel is one of the most processed and discussed in the literature. However, there is still no consolidated knowledge about the fatigue life of this material manufactured by different available techniques and their respective mechanisms of initiation of cracks predominant in the VHCF regime. The present work is intended for an experimental study of the VHCF failure mechanism of AISI 316L steel after additive manufacturing by laser directed energy deposition. In order to also identify the effect of post processing steps, two different conditions of the material (as built and heat treated) were analysed. The specimens were submitted to ultrasonic tests with a target number of cycles, at a frequency of 20±0,5 kHz and R=-1. The fracture surfaces were analysed later and the influence of heat treatment on the population of metallurgical defects, “fish - eye” formation and material’s fatig ue life were verified. © 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: L-DED; Ultrasonic fatigue; Crack initiation ( ) ss ti l si rit ri . st i l ss st l is f t st r ss is ss i t lit r t r . r, t r is still s li t l t t f ti lif f t is t ri l f t r iff r t il l t i s t ir r s ti is s f i iti ti f r s r i t i t r i . r s t r is i t f r ri t l st f t f il r is f I I st l ft r iti f t ri l s r ir t r siti . I r r t ls i tif t ff t f st r ssi st s, t iff r t iti s f t t ri l ( s ilt t tr t ) r l s . s i s r s itt t ltr s i t sts it t r t r f l s, t fr f , - . fr t r s rf s r l s l t r t i fl f t tr t t t l ti f t ll r i l f ts, fis - f r ti t ri l’s f ti lif r rifi . e t rs. lis e by Elsevier B.V. This is a e access article er t e - - lice se ( tt ://creati ec s. r /lice ses/ - c- / . /) Peer-review under responsibility of 23 European Confere ce ract re - ; ltr s i f ti ; r i iti ti 23 European Conference on Fracture - ECF23 Fatigue life assessment in the very high cycle regime of AISI 316L stainless steel processed by L-DED additive manufacturing M. F. Andrade a *, M. V. Pereira a , M. C. Teixeira a , A. T. Junior b , J. Gutjar c a Pontifícia Universidade Católica do Rio de Janeiro, Departamento de Engenharia Química e de Materiais, Rua Marques de São Vicente, 255, Rio de Janeiro, 22453-901, RJ, Brazil. b Universidade Federal de Santa Catarina, PPG em Engenharia e Ciências Mecânicas, Rua Dona Francisca, 8300, Joinville, 89219-600, SC, Brazil. c Universidade Federal de Santa Catarina, PPG em Engenharia Mecânica, Rua Lauro Linhares, 1850, Florianópolis, 88070-260, SC, Brazil. Abstract Additive manufacturing technologies have arisen great industrial interest for manufacture of components and final parts intended for applications in several sectors of the industry. Most of these components are designed to have a service life greater than cycles, making the analysis of the fatigue behaviour in the very high cycle regime r f r r t r - . . r de a , . . r ir a , . . i eira a , . . i r b , . tj r c a tifí i i rsi t li i ir , rt t ri í i t ri is, r s i t , , i ir , - , , r zil. b i rsi r l t t ri , ri i i s i s, r is , , i ill , - , , r zil. c i rsi r l t t ri , ri i , r i r s, , l ri lis, - , , r zil. str ct iti f t ri t l i s ris r t i stri l i t r st f r f t r f ts fi l rts i t f r li ti s i s r l s t rs f t i str . st f t s ts r si t s r i lif r t r t l s, i t l sis f t f ti i r i t r i l r i r s: -

*Corresponding author. E-mail address: matheus-fernandes-andrade@outlook.com rres i a t r. ress: at e s-fer a es-a ra e tl .c - il

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.2022.12.127 2452-3216 © 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 2452-3216 2020 he uthors. ublished by lsevier . . his is an open access article under the - - license (http://creativeco ons.org/licenses/by-nc-nd/4.0/) er res si ilit f r ea fere ce ract re - eer-re ie