Additive Manufacturing and HIP Rewire Pathways for Large Metal Components
Securing reliable sources of large metal components has become a strategic priority for energy and power generation infrastructure. Traditional casting and forging supply chains are increasingly strained, driving interest in large format metal 3D printing as an alternative route to production. Researchers at Oak Ridge National Laboratory (ORNL) are at the center of this shift, combining additive manufacturing with the hot isostatic pressing (HIP) process to create very large, structurally demanding parts. ORNL has demonstrated a 2,000-pound canister produced with multiple 3D printing methods and then consolidated via powder metallurgical HIP, yielding a component resembling a turbine blade. This additive manufacturing HIP process bypasses conventional foundry capacity while exploiting the geometric freedom of 3D printing and ORNL’s deep materials science expertise. The work, described internally as laying the foundation for a transformative shift in PM-HIP for large-scale components, specifically targets hydropower and next-generation nuclear applications.
From Prototypes to Production in Defense Supply Chain Manufacturing
Defense agencies are moving beyond one-off demonstrators toward production-scale use of large format metal 3D printing. A key catalyst is the Joint Additive Qualification for Sustainment – Supplier Qualification (JAQS-SQ) program, managed by America Makes and the National Center for Defense Manufacturing and Machining. Under Group 1 of this initiative, six suppliers have been awarded a total of USD 1.7 million (approx. RM7.9 million) to advance laser powder bed fusion capabilities for the defense industrial base. The selected companies are tasked with implementing process control documents and participating in new training and audit frameworks tailored to government acquisition requirements. By standardizing quality and accelerating qualification, the program directly tackles bottlenecks that have limited confidence in defense supply chain manufacturing using additive processes. The focus on laser powder bed fusion underscores a broader transition: additive is no longer just for prototypes but is being systematically integrated into qualified production of complex metal parts.
Armored Vehicle Suspension 3D Printing Proves Production-Scale Potential
A recent project by NP Aerospace shows how large format metal 3D printing is already delivering production-grade hardware. Working within a defense-focused additive initiative and partnering with the Digital Manufacturing Centre, the company produced a 110 kg suspension and differential carrier for an armored patrol vehicle using Caracol’s VIPRA XP system. The WAAM-based large-format platform, equipped with a 9-axis robotic arm and cold metal transfer technology, printed the ER100 steel assembly in about 60 hours. The result was a near-net-shape component incorporating extreme overhangs and organic geometries that would challenge conventional fixed-axis systems. After heat treatment and machining, the part met performance requirements for a structurally critical, shock-resistant suspension assembly. Compared with casting and forging, or multi-stage fabrication, this armored vehicle suspension 3D printing route removed tooling, cut lead time by roughly half, and enabled flexible, low-volume production—clear evidence that metal AM can meet stringent defense demands at scale.
Closing Vulnerability Gaps in Energy and Defense Supply Chains
The convergence of ORNL’s additive manufacturing HIP process, standardized laser powder bed fusion qualification efforts, and real-world defense applications signals a structural change in how large metal parts are sourced. For energy infrastructure, the ability to 3D print PM-HIP canisters and complex turbine or reactor components offers a way around fragile casting and forging networks, while unlocking design freedom that can improve performance and extend asset life. In defense, programs like JAQS-SQ create a framework to bring non-traditional suppliers into qualified production, broadening the industrial base. Case studies such as NP Aerospace’s suspension assembly highlight how large format metal 3D printing can respond quickly to urgent demands, reduce dependence on long, inflexible supply chains, and support iterative design updates. Together, these developments mark a shift from experimental prototyping toward resilient, production-scale manufacturing of mission-critical metal assemblies for both defense and energy systems.
