Expansion of Metal Additive Manufacturing: Technologies, Markets and Future Prospects
Metal additive manufacturing is undergoing a phase of significant expansion, characterized by technological innovations that drastically increase deposition rates and by growing confidence in the application of these technologies in critical sectors such as aerospace, defense, and energy. In 2026, the sector is at a turning point, with processes capable of producing multi-ton components and advanced materials that overcome the challenges of extreme environments.
Current Technological Landscape of Metal Additive Manufacturing
Researchers at Oak Ridge National Laboratory, in collaboration with ARC Specialties, have developed Electroslag Additive Manufacturing (ESAM), a high-productivity process for large metal components. This technique combines electroslag strip cladding (ESC) with wire arc additive manufacturing (WAAM), achieving deposition rates three to six times higher than conventional wire-based processes.
The ESAM process uses gas tungsten arc welding (GTAW) to build containment walls that confine the ESC deposition region, combining the high productivity of ESC with the geometric control of WAAM. During tests with alloy 625, the system demonstrated deposition rates of approximately 22.7 kg/h in ESC-only configurations and 11.3 kg/h for ESC filling in the convergent configuration, while maintaining mechanical properties comparable to the fused material.
A British research initiative led by the University of Nottingham and the UK Atomic Energy Authority is exploring Multi-Metal Laser Powder Bed Fusion (MM-LPBF) to create metamaterials intended for nuclear fusion machines. The DIADEM project aims to fuse different metals such as tungsten and copper, which have drastically different thermal properties, for applications in extreme environments.
Innovative Materials and Processes in 2026
Microstructural analysis of the ESAM process revealed a strong texture in the build direction in both stacking strategies tested. Mechanical testing showed that direct stacking produces slightly higher yield and tensile strength, while staggered stacking results in significantly greater ductility, differences attributed mainly to variations in iron dilution.
When ESC filling was combined with GTAW containment walls in the full ESAM configuration, microstructural analysis and nanoindentation indicated that the presence of the GTAW walls did not negatively affect the material properties. Hardness and elastic modulus remained constant in the GTAW, ESC, and interface regions.
The AMPP (Advanced Materials Production & Processing Center), operating at the LIFT facility in Detroit, focuses on the production and development of materials in powder, wire, and bar form for additive processes. The center produces materials such as aluminum, titanium, various nickel alloys, C103 niobium, and stainless steel, offering experimental quantities of custom alloys for customers' operational needs.
Industrial Applications and High-Growth Sectors
The DIADEM project will support critical technologies for nuclear fusion programs, including STEP, the British prototype fusion power plant aiming for operation by 2040. Future applications of multi-metallic metamaterials will extend to sectors such as aerospace, defense, and healthcare, where high-performance multi-metallic components are required.
In the aerospace sector, metal additive manufacturing is moving from niche applications to an essential tool for creating lighter and more efficient components. The growing availability of real-world data on the performance of additively manufactured components in flight has generated new confidence in applying this technology to aircraft design.
Heat exchangers produced with AM technology enable the creation of highly efficient, lightweight, and conformal structures that can follow the natural curves of a fuselage or engine manifold. Defense programs, with tighter development cycles and greater acceptance of technical risk when performance benefits are clear, are adopting metal additive manufacturing more rapidly than civil aviation.
Technical Challenges and Production Scaling Solutions
The Oak Ridge National Laboratory research team is developing a fully robotic ESAM work cell that integrates coordinated ESC and GMAW systems, with the goal of advancing the process from laboratory-scale demonstrations to an automated production platform. Future work will focus on larger test articles, full-scale mechanical testing, and advanced capabilities such as in situ alloying and functionally graded materials.
Variability in additive manufacturing represents a deterrent for manufacturers. LIFT is addressing this monumental problem by leveraging integrated computational materials engineering (ICME) tools, which include modeling and simulation software used to develop materials and their respective processes. The automation and integration of these tools will accelerate materials processes and enable simulation-based testing, reducing the physical testing required.
A significant role of the AMPP center extends beyond materials development to defining process parameters for AM. Using 3D printing and laboratory equipment at LIFT, the AMPP initiative develops ideal printing parameters and processing windows for new materials.
Global Market Analysis and Forecasts to 2030
The ESAM process provides a potential pathway to accelerate the adoption of additive manufacturing in applications requiring large, near-net-shape metal components, particularly where build rate and supply chain resilience are critical considerations. According to researchers, the approach could support the production of multi-ton components currently manufactured by casting and forging, particularly in energy sector applications.
The primary goal of the AMPP center is to integrate a multi-filament supply chain specifically in the AM sector, preventing customers from depending on a single supplier for all their needs. The center also focuses on collecting U.S.-sourced materials for consulting clients, in order to simplify processes through domestic partnerships.
The long-term potential in civil aviation is enormous. Lighter and more efficient engines and airframes could significantly reduce emissions and fuel consumption. Additive manufacturing also makes it possible to produce low-volume spare parts for aircraft that have been in service for decades, without the need to restart entire production lines.
Regulations, Standardization and Quality
Before additive components can be used in flight, they must pass a very rigorous certification process. Engineers define “allowables,” statistical limits that describe the behavior of a material. Traditionally, this has required producing and testing thousands of small samples over many years, often at a cost of millions of dollars.
For metal additive parts, this process is even more complex, since each machine and parameter set can create different material properties, and a single component can include both thick sections and very thin internal walls. Demonstrating the reliability of such geometries requires new testing methods and a deeper statistical understanding.
Inspection technology is improving. Engineers can now use CT scanning and other advanced techniques to examine the interior of printed parts and understand their behavior in detail. Collaboration with facilities such as the Australian Synchrotron provides access to world-class beamline facilities, enabling the examination of metal components at a microscopic level, providing detailed data essential for developing reliable statistical allowables.
Development Outlook and Future Roadmap
With the design freedom offered by additive manufacturing, it is now possible to create parts 30 to 40 percent smaller and lighter while maintaining or even improving performance. Conformal designs could also support entirely new aircraft architectures, with shapes and configurations previously impossible to build.
Collaboration is essential to advancing this technology. Qualification and certification of additive parts require strong collaboration between large manufacturers, smaller technology specialists, research institutions, and governments. Once a process or part is proven, that knowledge can be shared across the entire industry, allowing the whole supply chain to move faster.
As technology continues to mature, metal additive manufacturing will not only improve the way we produce components, but also transform the way we design them. Lighter, faster, and more efficient aircraft will define the next generation of aviation, and additive manufacturing will play a central role in making that future possible.
article written with the help of artificial intelligence systems
Q&A
What is the main innovation introduced by the ESAM process and what advantages does it offer over conventional technologies?
ESAM (Electroslag Additive Manufacturing) combines electroslag strip cladding and wire arc additive manufacturing, achieving deposition rates 3 to 6 times higher than traditional wire processes. In the alloy 625 test it recorded 22.7 kg/h in pure ESC mode, maintaining mechanical properties comparable to cast material.
For which specific applications is the DIADEM project developing multi-metallic metamaterials?
DIADEM aims to produce metamaterials for nuclear fusion machines, fusing metals with very different thermal properties such as tungsten and copper. Future applications will extend to aerospace, defense and healthcare, where high-performance multi-metallic components are needed in extreme environments.
How does the AMPP center contribute to reducing variability in metal additive manufacturing?
AMPP uses ICME (Integrated Computational Materials Engineering) tools to model and simulate materials and processes, accelerating development and reducing physical testing. It also defines optimal printing parameters for new materials, integrating a multi-filament supply chain to avoid dependence on single suppliers.
What are the main challenges for certifying additive components in the aerospace field?
Every machine and parameter set can produce different properties; a component can have thick sections and thin walls. Demonstrating reliability requires new test methods, CT scans and synchrotron data to build statistical allowables, as the traditional process would require thousands of samples and millions of dollars.
How can metal additive manufacturing influence the life cycle of existing aircraft?
It enables low-volume spare parts production for obsolete aircraft without reactivating entire production lines, reducing costs and lead times. In the long term, lighter and more efficient engines and airframes obtained with AM could reduce emissions and fuel consumption, extending the operational life of fleets.
