NASA HR1 alloy is an iron-nickel based material designed by NASA and derived from A286
and JBK-75 alloys. At extreme conditions, NASA HR1 possess high strength, high fatigue resistance,
and high resistance to corrosion and hydrogen embrittlement. The main applications include
structural components and liquid rocket engine nozzles with internal cooling channels. NASA has
produced HR1 using vacuum induction melting (VIM), a considerably expensive fabrication method.
Aimed to explore other more affordable and accessible manufacturing methods, HR1 specimens were
fabricated under different parameters using Laser-Powder Directed Energy Deposition (LP-DED) and
were heat treated through stress relief, homogenization, solution treatment and aging. The feasibility
of this AM process was investigated by evaluating mechanical and microstructural analysis on
specimens. This work finalizes with discussion and remarks on tensile and low-cycle fatigue
properties and its relationship with microstructural features.Mechanical Engineerin
