Techniques for controlling the microstructure of sprayed steel structures are
discussed in this paper. Steel is arc sprayed onto shaped substrates to form tooling. The
quality of the tool is greatly influenced by the microstructure of the material and the interlamella
regions of the deposit. This work is focused on characterizing the microstructure,
improving the state of the inter-lamella regions, and discusses our success in forming
pseudo-alloys and graded shells by mixing sprayed materials. Microstructure control has
interesting implications for other research as well, such as the MASK & DEPOSITS approach
of forming objects.Mechanical Engineerin
