PSI - Issue 18

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

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ScienceDirect

Procedia Structural Integrity 18 (2019) 742–748

25th International Conference on Fracture and Structural Integrity Study of CuCrZr alloy for the production of a passive satellite A. Brotzu a , F. Felli a *, D. Pilone a , V. Di Cocco b , G. Sindoni c , I. Ciufolini d a DICMA, Sapienza Università di Roma, Roma 25th International Conference on Fracture and Structural Integrity Study of CuCrZr alloy for the production of a passive satellite A. Brotzu a , F. Felli a *, D. Pilone a , V. Di Cocco b , G. Sindoni c , I. Ciufolini d a DICMA, Sapienza Univ rsità di Roma, Roma

b Università degli Studi di Cassino e del Lazio Meridionale, Cassino (FR) c Scuola Ingegneria Aerospaziale, Sapienza Università di Roma, Roma d Dipartimento Ingegneria dell’Innovazione, Università del Salento, Lecce b Università d li Studi di Cassino e del La io Meridionale, Cassino (FR) c Scuola I geg eria Aerospaziale, S pie za Università di Roma, Roma d Dipartimento Ingegneria dell’Innovazione, Università del Salento, Lecce

Abstract Fracture toughness and tensile tests have been carried out on a CuCrZr alloy to characterize its fracture behavior since it is considered a possible candidate for the construction of a passive satellite. Based on the satellite design requirements some copper based alloys have been studied. These alloys are interesting candidates for the satellite construction because of their physical properties, such as high thermal conductivity and density, and because of their mechanical properties, in fact CuCrZr alloy is age hardenable. The low ductility and toughness of age hardened alloys are not a critical issue for the satellite body, but it could be a problem for the screws. For that reason, the study of the fracture behavior of this alloy is of crucial importance for material selection in the satellite design. Abstract Fracture toughness and tensil tests have been carried out on a CuCrZr alloy to characterize its fract re behavior since it is considered a possibl candi ate for the construction of a passive satellit . Based on the satellite design requirements some copper based alloys have been studied. These allo s are interesti g candidates for the satellite construction because of their physical prop rties, such as high therm l conductivity and density, and because of their mechanical properties, in fact CuCrZr all y is age hardenable. The low ductility and toughn ss of age ardened alloys are not a critical issue for the satellite body, but it could be a problem for the screws. For that reason, the study of the fracture behavior of this alloy is of crucial importance for material selection in the satellite design.

© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo.

Keywords: Copper alloy; CuCrZr alloy; Lares 2; Satellite material. Keywords: Copper alloy; CuCrZr alloy; Lares 2; Satellite material.

1. Introduction This work was developed in the context of a wider research aimed at the study and development of alloys for producing passive artificial satellites. These alloys must have high density, high mechanical properties and high thermal conductivity as well as other less relevant features as main requirements. In 2012 a first satellite called LARES was produced and successfully launched, consisting of a metallic sphere (364 mm in diameter) made of a tungsten 1. Introduction This work was developed in the context of a wider research aimed at the study and development of alloys for producing passive artificial satellites. These alloys must have high density, high mechanical properties and high thermal conductivity as well as other less relevant features as main requirements. In 2012 a first satellite called LARES was produced and successfully launched, consisting of a metallic sphere (364 mm in diameter) made of a tungsten

* Corresponding author. Tel.: +390644585601 E-mail address: Ferdinando.felli@uniroma1.it * Correspon ing author. Tel.: +39064458560 E-mail address: Ferdinando.felli@uniroma1.it

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo.

2452-3216  2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. 10.1016/j.prostr.2019.08.222