Rapidly solidified aluminium for optical applications

摘要

This paper present the results of a diamond turning study of a rapidly solidified aluminium 6061 alloy grade, known asRSA6061. It is shown that this small grain material can be diamond turned to smaller roughness values than standardAA6061 aluminium grades. Also, the results are nearly as good as nickel plated surfaces, but the RSA6061 has theadvantage that no additional production steps are needed and that no bi-metallic bending or delamination can occur in athermally changing environment, e.g. when cooling to cryogenic temperature. Therefore, RSA6061 is a good material foroptical applications in the visual spectrum.