PSI - Issue 19

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000

ScienceDirect

Procedia Structural Integrity 19 (2019) 362–369

Fatigue Design 2019 Fatigue resistance of light alloy sheets undergoing eco-friendly chemical milling: metallurgical and chemical aspects Raffaella Sesana a* , Silvia Spriano b , Sara Ferraris b , Paolo Matteis b Fatigue Design 2019 Fatigue resistance of light alloy sheets undergoing eco-friendly chemical milling: metallurgical and chemical aspects Raffaella Sesana a* , Silvia Spriano b , Sara Ferraris b , Paolo Matteis b

Fatigue Design 2019 F tigue r sistance of l ght alloy sheets undergo chemic l milling: metallurgical and chem Raff ella Sesana a* , Si via Spriano b , Sara Ferraris b , P

a DIMEAS, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy b DISAT, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy a DIMEAS, Politecnico di Torino, Corso Duca degli Abru zi 24, 10129 Torino, Italy b DISAT, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy

a DIMEAS, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 To b DISAT Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Tor

© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Fatigue Design 2019 Organizers. Then, the results of an experimental campaign on an aluminum alloy is presented. In particular, high cycle fatigue tests results are presented on specimens subjected or not subjected to an eco-friendly alkaline chemical milling process (called " Green Etching") and chemical, profilometric and metallographic analyses are presented and related to fatigue resistance results. Wettability and surface charge results will be presented . © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Fatigue Design 2019 Organizers. Abstract Component lightening is a key issue for automotive and aerospace industries. Lightening processes on design profile are not always possible by me ns of traditional machining processes. Then, chemical milling processes re used, often by acid etching. Th effect on fatigue behavior is related on many factors, such as chemical surface composition and surfac roughness. Material removal through chemical milling is in particular interesting for Additive manufactured components where surface finish still r mains a parameter difficult to be controlled and repeated. The environmental aspects related to alkaline and acid processing are still an important issue. I the present paper, an overview on chemical milling for component lightening is presented with focus of the effects on mechanical and chemical resistance of materials. Then, the results of a xperimental campaign on an aluminum alloy is present d. In particular, high cycle fatigue tests results are pres nted on specimens subjected or n t subjecte to an eco-friendly alkaline chemical milling process (called " Green Etching") and chemical, profilometric and metallographic analyses are presented and related to fatigue resistance results. Wettability and surface charge results will be presented . © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Fatigue Design 2019 Organizers. Abstract Component light ni g is a key ssu for aut motive a aeros ace industries. Lightening proce po sible by means of traditional machi ing processes. Then, chemical milling processes are u on fatigue b ha ior is related on many f ctors, such as c mical surface composition and s through chem cal milling is in particular i eresting fo Additiv manufactured components param t r d fficult to be con rolled and repe ted. The environmental aspec s related to alka important issue. In the present ap r, an ov rview on ch mical milling f r component light ning s presented w and chemical resistance of materials. Then, the results of an experim ntal campaign o n aluminum alloy is presented. In tests results are prese ted on specim s subjected or not subjecte to n eco-friendly process (ca led " Green Etching") and chemical, p ofilometric metallographic an to fatigu resistance re ults. Wettability and surface charge results will be presented © 2019 The Authors. Published by Elsevier B.V. Pe r-review under responsibility of the Fatigue Design 2019 Organizers. Abstract Component lightening is a key issue for automotive and aerospace industries. Lightening processes on design profile are not always possible by means of traditional machining processes. Then, chemical milling processes are used, often by acid etching. The effect on fatigue behavior is related on many factors, such as chemical surface composition and surface roughness. Material removal through chemical milling is in particular interesting for Additive manufactured components where surface finish still remains a parameter difficult to be controlled and repeated. The environmental aspects related to alkaline and acid processing are still an important issue. In the present paper, an overview on chemical milling for component lightening is presented with focus of the effects on mechanical and chemical resistance of materials. 1. Introduction Chemical milling is documented since 2500 B.C., when it was used for copper jewels manufacturing by means of citric acid in Egypt (Harris, 1976). In the 1950s, chemical milling was accepted as one of the most important non conventional manufacturing techniques. Industrial implementation is due to M. C. Sanz and North Aviation Inc. in 1. Introduction Chemical milling is documented since 2500 B.C., when it was used for copper jewels manufacturing by means of citric acid in Egypt (Harris, 1976). In the 1950s, chemical milling was accepted as one of the most important non conventional manufacturing techniques. Industrial implementation is due to M. C. Sanz and North Aviation Inc. in 1. Introduction Chemical mill ng i documented sinc 2500 B.C., when it was used f r copper je citric acid in Egypt (Harris, 1976). In the 1950s, che ical illing was accepted as conventional anuf ctur ng techniques. Industrial implement is due to M. C. Keywords: chemical etching; light alloys; fatigue resistance Keywords: chemical etching; light alloys; fatigue resistance Keywords: chemical etching; light alloys; fatigue resistance

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Fatigue Design 2019 Organizers. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Fatigue Design 2019 Organizers.

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Fatigue Design 2019 Organizers.

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Fatigue Design 2019 Organizers. 10.1016/j.prostr.2019.12.039