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@inproceedings{parise:ipac2021-wepab334,
author = {R.L. Parise and O.R. Bagnato and R. Defavari and M.W.A. Feitosa and F.R. Francisco and D.Y. Kakizaki and R.D. Ribeiro},
% author = {R.L. Parise and O.R. Bagnato and R. Defavari and M.W.A. Feitosa and F.R. Francisco and D.Y. Kakizaki and others},
% author = {R.L. Parise and others},
title = {{Development of Diffusion Bonded Joints of AA6061 Aluminum Alloy to AISI 316LN Stainless Steel for Sirius Planar Undulators}},
booktitle = {Proc. IPAC'21},
pages = {3459--3462},
eid = {WEPAB334},
language = {english},
keywords = {vacuum, undulator, interface, MMI, operation},
venue = {Campinas, SP, Brazil},
series = {International Particle Accelerator Conference},
number = {12},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {08},
year = {2021},
issn = {2673-5490},
isbn = {978-3-95450-214-1},
doi = {10.18429/JACoW-IPAC2021-WEPAB334},
url = {https://jacow.org/ipac2021/papers/wepab334.pdf},
note = {https://doi.org/10.18429/JACoW-IPAC2021-WEPAB334},
abstract = {{LNLS has been commissioning Sirius, a 4th-generation synchrotron light source. The commissioning of the beamlines has been mainly done by using planar undulator, which uses in-house built aluminum vacuum chambers with ultra-high vacuum tight bimetallic flanges. In order to manufacture these flanges, diffusion bonded joints of AA6061 aluminum alloy to AISI 316LN stainless steel were developed. Diffusion bonding was carried out at 400-500°C for 45-60 min, applying a load of 9.8MPa in a vacuum furnace. Also, the surface preparation for Al and SS was investigated. SEM observation revealed that an 1-3 µm reaction layer was formed at the AA6061/Ni-plated interface. The intermetallic compound Al3Ni was identified in the reaction layer. The obtained Al/SS joints showed mean ultimate strength of 84 MPa, with the fracture occurring in the Al/reaction layer interface. Bake-out cycles followed by leak tests were carried out to validate the process and approve their use on the planar undulator vacuum chambers. Two undulators with Al/SS flanges have been installed and are under operation in the storage ring.}},
}