Dezincification of boron implanted brass

Dezincification tests, transmission electron microscopy and γ-yields of the reactions 10B(p, αγ)7Be, 10B(α, pγ)13C and 11B(p, γ)12C obtained by using a 2.5 MV Van de Graaff accelerator were employed in corrosion, structure and composition analyses in improving the dezincification resistance of brass with additions of boron. The macrosegregation analyses revealed that the poor dezincification resistant as-cast brasses, which have large additions of boron, also have a large accumulation of boron near the centerline, whereas boron implantation with 5 at.% maximum boron concentration is able for a short time to give such effectively improved dezincification resistance, which in the case of low boron alloyed brasses has been attributed to the trapping of vacancies with boron atoms. (orig.)