Here is a paper discuss how to perform ArchiMate to UML Mapping:
Abstract: ArchiMate is a notation for enterprise architecture modeling and its use and popularity is on the rise. However, the more technically oriented modeling notation UML is used as a base in most available modeling tools and UML is also needed for more detailed type of models. To make use of existing modeling tools and for ArchiMate be able to co-exist with other types of models
based upon UML there is a need to understand the relationship between ArchiMate and UML. This paper offers one possible and well-founded proposition for a mapping between ArchiMate and UML.