18–22 May 2025
Peppermill Reno
US/Pacific timezone

M1Or1A-01: Microstructure and 77K mechanical properties of electron beam welded Cu101- Inconel 625 joints

19 May 2025, 09:30
15m
Naples 4/5

Naples 4/5

Speaker

Shreyas Balachandran (Thomas Jefferson National Accelerator Facility)

Description

In developing large-scale next-generation superconducting radio frequency (SRF) linear accelerators using superconducting films on Cu, the design and development of dissimilar welding and joining metals, such as Cu to Inconel, stainless steel, and Nb, are essential. In this talk, we present the development of procedures for electron-beam welding of Cu-Inconel 625 and evaluation of the microstructure and 77K mechanical properties of the weld and base material in the welded condition and heat treatments in the 750°C- 950°C heat treatment range. The results will be presented in the context of developing joining techniques for low-temperature applications where high conductivity and strength, vacuum hygiene, and magnetic properties of the material need consideration. The methods presented here are being deployed to thin film SRF Cu cavities at Jefferson Lab.

Authors

Adam O'Brien Dr Aniket Ingrole (National High Magnetic Field Laboratory (NHMFL), Florida State University) Anne-Marie Valente-Feliciano Gregory Grose (Thomas Jefferson National Accelerator Facility) Jun Lu Oleksandr HRYHORENKO (Thomas Jefferson National Accelerator Facility) Shreyas Balachandran (Thomas Jefferson National Accelerator Facility)

Presentation materials

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