Assessment of Residual Stress in Ultrasonically Welded Single Lap Shear Coupons as a function of material crystallinity

NASA’s National Space Science Center (NSSC) seeks capability statements from qualified firms to assess residual stress in ultrasonically welded single‑lap shear coupons as a function of material crystallinity. The effort will be performed at NASA’s Glenn Research Center, where the selected vendor will conduct ultrasonic welding of NASA‑supplied composite adherends, record process parameters, and deliver welded coupons along with detailed reports. Although RTX Corporation is identified as the sole‑source candidate, the agency is evaluating market interest to determine if a competitive procurement is possible. • Perform up to 12 process‑development ultrasonic welds, then 36‑plus‑60 production welds on NASA‑provided T1100/LM‑PAEK, IM7/PEKK, and film materials. • Record energy, pressure, cycle time, and material behavior for each weld; submit weekly remote review meetings and monthly progress reports. • Deliver welded coupons to NASA Glenn (or optionally to Cornell’s CHESS facility) and provide all associated documentation.