Haynes 242 Alloy for Lares 2 Satellite

Daniela Pilone; Andrea brotzu; Ferdinando Felli; Ignazio Ciufolini; Barbara Negri; Claudio Paris

doi:10.3221/IGF-ESIS.56.04

Haynes 242 Alloy for Lares 2 Satellite

Authors

Daniela Pilone DICMA, Sapienza Università di Roma, Via Eudossiana 18, 00184 Roma, Italy
Andrea brotzu DICMA, Sapienza Università di Roma, Via Eudossiana 18, 00184 Roma, Italy
Ferdinando Felli DICMA, Sapienza Università di Roma, Via Eudossiana 18, 00184 Roma, Italy
Ignazio Ciufolini Dipartimento di Ingegneria dell’Innovazione, Università del Salento, Via per Monteroni, 73100 Lecce, Italy
Barbara Negri Agenzia Spaziale Italiana, Italy
Claudio Paris Centro Ricerche Enrico Fermi, Via Panisperna 89/A, 00184 Roma, Italy

DOI:

https://doi.org/10.3221/IGF-ESIS.56.04

Keywords:

Haynes 242, Lares 2, Mechanical properties, Passive satellite

Abstract

The satellite LARES 2 is designed to test dragging of inertial frames, or frame-dragging, predicted by Einstein’s theory of General Relativity, with accuracy of a few parts in a thousand. For this purpose, besides the typical requirements for a space construction, a high density alloy must be used. In this paper are reported the studies performed on a nickel alloy, the Haynes 242, that is considered a possible candidate for manufacturing all the metallic parts of LARES 2 and other passive geodetic satellites. Haynes 242 density and mechanical properties are compliant with the requirements of the mission. Three different casting with the nominal composition of the alloy have been prepared and tested along with a commercial bar of Haynes 242. The results of tensile and hardness tests on several specimens with different aging time are reported, along with the relevant metallographic analysis. Furthermore, a test on the machinability, performed on a screw, which is the most demanding item from the manufacturing point of view, is reported.

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Published

28-03-2021

Issue

Vol. 15 No. 56 (2021): April 2021

Section

Fractography and Advanced metallography

License

This work is licensed under a Creative Commons Attribution 4.0 International License.

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