Abstract
In this paper, austenitic EN-1.4404—AISI 316L stainless steel assemblies have been brazed using concentrated solar energy, in vacuum, air and argon media, under different heating and cooling conditions. A nickel-based alloy (EN 2.4360—Monel 400) has been used as a filler material for brazing, aiming to obtain mechanically and chemically resistant joints, with potential application in low Earth orbit assembling where the solar energy flux bears higher values and degradative conditions are more demanding. By brazing with Monel in vacuum, good quality joints were obtained with minimal defects, being composed of solid solution grains, with shear strength values of 285–320 MPa and elongation values of 4.5–6 mm, while in argon medium, shear strength values of 350–370 MPa and elongation values of 7–8 mm have been obtained. Concentrated solar energy brazing in vacuum and argon has led to promising results which could prove an alternative to on-site low Earth orbit construction joining.
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