| Abstract Scope |
SolidStir® Additive Manufacturing (AM) is a solid-state deposition process that offers a robust and economical alternative to conventional fusion-based AM methods. In contrast to existing solid-phase AM processes, which typically require high-cost equipment and stringent feedstock specifications in terms of size, shape, and quality, SolidStir® AM utilizes conventional machine tools. This study demonstrates the feasibility of implementing SolidStir® AM using a standard CNC milling machine and low-cost, industrial-grade feedstock. Notably, the process can utilize scrap metal, machined chips, and swarf to generate its feedstock, further enhancing its sustainability and cost-effectiveness. Unlike fusion-based AM, SolidStir® AM relies on frictional heat and plastic deformation to achieve metallurgical bonding under hydrostatic stress, without reaching the melting point. This solid-state approach virtually eliminates common fusion-related defects such as porosity and solidification cracking. By removing the need for high-end equipment and premium feedstock, this technology advances both the sustainability and economic viability of solid-state AM. |