Comparative Analysis of Inconel 718 and Inconel 625 for Rocket Nozzles: Performance, Durability, and Manufacturing Influence

Authors

  • Vishnuprakash B Chief Operational Officer, Aeroin SpaceTech Private Limited, Chennai, Tamil Nadu, India – 600100
  • Mohamed Abdullah K Project Associate at Aeroin SpaceTech Private Limited, Chennai, Tamil Nadu, India
  • Kavyassree G Department of Aerospace Engineering, SNS college of Technology, Tamil Nadu, India
  • Srimathi S Department of Aerospace Engineering, SNS college of Technology, Tamil Nadu, India

DOI:

https://doi.org/10.61359/11.2106-2516

Keywords:

Rocket Nozzles, Inconel 718, Inconel 625, Engine Performance

Abstract

Rocket nozzles operate under extreme thermal loads, high-velocity gas flow, and mechanical stresses, making material selection crucial for performance and durability. Inconel 718 and Inconel 625 are widely used nickel-based superalloys due to their high temperature strength, oxidations resistance, and mechanical reliability. However, a direct comparison of their erosion resistance, thermal stability, and manufacturability for rocket nozzle applications remains limited. This review consolidates research on their microstructural behavior, welding characteristics, and additive manufacturing feasibility to assess their suitability for propulsion systems. While Inconel 718 offers superior strength, creep resistance, and phase stability, Inconel 625 provides better flexibility, oxidation resistance, and weldability. Additionally, the influence of fabrication techniques, phase transformations, and structural integrity on long-term performance is examined. The findings provide valuable insights into performance trade-offs and material selection strategies, supporting advancements in rocket nozzle design and manufacturing for next-generation aerospace applications.

Downloads

Download data is not yet available.

Downloads

Published

2025-03-30

How to Cite

Vishnuprakash B, Mohamed Abdullah K, Kavyassree G, & Srimathi S. (2025). Comparative Analysis of Inconel 718 and Inconel 625 for Rocket Nozzles: Performance, Durability, and Manufacturing Influence. Acceleron Aerospace Journal, 4(3), 1002–1009. https://doi.org/10.61359/11.2106-2516