TY - RPRT TI - Towards High-Speed friction stir welding of 25 mm Thick AA2139-T8: tool innovation and process development AU - Das, Hrishikesh [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)] AU - Upadhyay, Piyush [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)] AU - Okeke, Uchechi C. [Naval Surface Warfare Center (NSWC), West Bethesda, MD (United States). NSWC Carderock Division] AU - McDonnell, Martin M. [Army Combat Capability Development Center, Warren, MI (United States)] AU - Reza-E-Rabby, Md. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)] (ORCID:0000000175090395) PY - 2026 DO - 10.1007/s00170-025-17090-6 UR - https://www.osti.gov/biblio/3375949 ID - 3375949 ER -