Microstructure and mechanical properties of nickel-chrome-bor-silicon layers produced by the atmospheric plasma spray process

Abstract

In this chapter, the microstructure and mechanical properties of solidified additive manufactured titanium alloys are presented with emphasis on the “work horse” Ti–6Al–4V alloy. The as-solidified microstructures are rationalized in terms of the thermal history that the material has experienced. Tensile properties of the alloy are presented and shown to exhibit higher strength levels but lower ductility than conventionally processed material. The S–N fatigue behavior of AM material is slightly superior to conventional material but is degraded as the surface roughness of the as-deposited AM material is increased. Repaired Ti–6Al–4V material, using DMD technology, exhibits good strength levels but can show a drop in ductility.