Engineering#12 in February 2026 EditionHigh-speed friction stir welding of high-strength aluminum-lithium alloys for aerospace cryogenic fuel tanks
Gregoire Laurent, Sanjay Verma, Oliver Schmidt et al.
OPENSTEM EDITORIAL SUMMARY
What the research examines
Aerospace engineers optimize high-speed friction stir welding parameters for third-generation Al-Li 2195 alloy sheets, demonstrating joint weld efficiencies of 91% and eliminating weld porosity in liquid oxygen/methane rocket propellant tanks.
Why it may matter
Enables lighter, stronger launch vehicle propellant tanks essential for deep-space payload capacity expansion.
What to examine carefully
Tool pin wear from hard intermetallic particles requires periodic replacement during long longitudinal cylinder welds.
Editorial scope: This is a concise, independently written introduction based on the publisher information, not a full systematic review or independent replication. It must not replace reading the original methods, limitations and conclusions.
STUDENT RESEARCH LENS · ORIGINAL OPENSTEM NOTES
Try a small, reproducible follow-up
Model heat generation and peak thermal profiles during friction stir welding using Rosenthal moving-point-source thermal equations.
Questions to investigate
- How did post-weld cryogenic heat treatment restore precipitate microstructure in the heat-affected zone?
- What fracture toughness was measured in weld seams at liquid nitrogen temperatures (-196 °C)?
These are independently proposed educational investigations, not activities that the original research authors claim to have completed.
Publication & researcher information
JournalJournal of Materials Processing Technology
Published online2026-02-11
Authors (selected)Gregoire Laurent, Sanjay Verma, Oliver Schmidt et al.
University / laboratoryNASA Marshall Space Flight Center
CountryUnited States
Multi-author research may involve universities in several countries. Unverified institutions and contact addresses are not inferred from authors' names.