Laser assisted cold spray of Fe–Ni–Zr oxide dispersion strengthened steel

Abstract

This letter demonstrates the use of laser assisted cold spray for consolidation of oxide dispersion strengthened steel. Cold spray with and without the use of an in situ laser for heating of the substrate was used to deposit coatings of a Fe–Ni–Zr based oxide dispersion strengthened steel powder. Nanoscale zirconium oxide dispersants were found to be present in deposits produced with and without use of the heating laser. Higher substrate temperatures increased deposition efficiency, but also produced samples with lower hardness, larger grain size, and coarser oxide dispersants.