| Abstract Scope |
Manufacturability of metallic components, with simple or complex shapes, require comprehensive description of their constitutive behavior. In this paper, thermal, mechanical and chemical transients introduced during welding and additive manufacturing (AM) will be reviewed. Role of these transients on solid, liquid, gas and plasma phase stabilities will be discussed with recent results from iron, aluminum, nickel and titanium-based alloys. The role of liquid-plasma instability on creation of non-equilibrium phases within spatter, during laser powder bed processing of 316 stainless steels, will be presented. The creation of defects due to interplay of keyhole, gas porosities and lack of fusion in Al-Si-Mg alloys will be discussed and ability to mitigate the same using innovative scan strategies will be presented. Similarly, the potential to use innovative scanning strategies to create site-specific texture/properties in nickel base and titanium alloys will be introduced. Finally, these results will be tied to the qualification of AM components. |