This case highlights a strategic aerospace forging engagement with a leading U.S.-based Tier-1 aerospace supplier specializing in propulsion systems for commercial and defense aircraft. The project involved the design, material qualification, and serial production of high-integrity titanium alloy turbine disks — critical rotating components operating under extreme thermal and mechanical loads. Spanning 18 months, the initiative covered engineering collaboration, ASTM/AMS-compliant process development, and AS9100-certified manufacturing across 3 production batches totaling 472 precision-forged units. The scope included full traceability (heat lot, die ID, NDT records), dimensional validation per NAS970, and delivery to ITAR-controlled facilities in Ohio and California.
The customer faced mounting pressure to localize critical forging capacity amid supply chain volatility and tightening U.S. Department of Defense sourcing mandates. Their existing offshore supplier struggled with inconsistent grain flow uniformity, occasional subsurface discontinuities detected during ultrasonic inspection (per AMS 2631), and noncompliance with required titanium alloy Ti-6Al-4V ELI (Extra Low Interstitial) chemistry tolerances — particularly oxygen and iron content. Additionally, lead times exceeded 24 weeks, jeopardizing engine assembly schedules for a next-generation turbofan program. The Tier-1 supplier urgently needed a domestic-capable partner with proven expertise in aerospace-grade titanium forging, rigorous process control, and rapid response to engineering change orders without compromising certification integrity.
We deployed a dedicated aerospace forging cell equipped with a 5,000-ton hydraulic press, vacuum atmosphere heating furnaces, and real-time thermal profiling systems calibrated to ±1°C. Working closely with the customer’s metallurgical team, we optimized the multi-stage closed-die forging sequence — including preform design, controlled strain-rate deformation, and post-forging air-cooling ramp profiles — to achieve uniform equiaxed microstructure (ASTM E112 Grade 5–6) and eliminate flow-line interruptions. All billets were sourced from certified U.S. mill stock meeting AMS 4911 requirements, with full mill test reports and PMI verification. Each forging underwent 100% automated ultrasonic scanning (per AMS 2631 Class A), dye penetrant inspection (AMS 2644), and dimensional CMM verification against GD&T-controlled CAD models. We implemented a digital batch record system integrated with the customer’s MRP platform, enabling real-time status updates and instant access to PPAP documentation, including FAI reports and process capability studies (Cpk ≥ 1.67 across key dimensions).
The project achieved 99.4% first-pass yield across all 472 forgings, with zero non-conformances related to metallurgical integrity or dimensional compliance. Average lead time was reduced to 11.2 weeks — a 53% improvement over prior performance — enabling the Tier-1 supplier to accelerate prototype engine builds by two calendar quarters. Ultrasonic inspection results showed <0.1% indication rate above reference standard sensitivity, well below the 1.5% contractual threshold. Crucially, all delivered turbine disks passed subsequent customer heat treatment, machining, and final spin testing without rejection. The success led to a three-year framework agreement covering five additional titanium and nickel-based superalloy components, expanding our footprint in the US aerospace market.
‘Their deep understanding of titanium forging physics — not just equipment operation — made the difference,’ stated the supplier’s Director of Advanced Manufacturing. ‘They treated our engineering constraints as non-negotiable design inputs, not production hurdles. This partnership has strengthened our Tier-1 resilience and supports our commitment to DoD Trusted Supplier status.’ This aerospace forging project underscores our capability to serve demanding Tier-1 aerospace suppliers with mission-critical components — combining metallurgical rigor, regulatory discipline, and responsive execution in the highly regulated US aerospace market.
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