REEM™ 6020
Next‑generation lightweight systems increasingly require materials that combine low density with high strength, elevated fatigue resistance, and improved ignition behavior. Conventional magnesium alloys offer mass efficiency but often suffer from limited flame resistance, coarse grain structures, and reduced corrosion performance. REEM™ 6020 is a high‑performance flame‑stabilized alloy engineered for structural applications requiring elevated strength, optimized stiffness, enhanced corrosion resistance, and exceptional ignition resistance. The alloy leverages RE‑Ca grain‑boundary stabilization and oxide‑film enhancement to achieve a fine, thermally stable microstructure with strong fatigue performance and improved environmental durability. With a density of ~1.80 g/cm³, tensile strength of ~440–462 MPa, yield strength of ~385–407 MPa, fatigue strength of ~171–204 MPa, and an ignition temperature of ~720–740 °C. REEM™ 6020provides a lightweight, flame‑resistant solution for aerospace, defense, automotive, energy, and industrial systems.
ALLOY Structure
REEM™ 6020 is a flame-stabilized, structural alloy engineered around a fine α-Mg matrix reinforced by RE–Ca–modified intermetallic phases. In the extruded condition, the alloy exhibits a refined grain structure of approximately 3–10 µm, driven by strongly active dynamic recrystallization (DRX) during hot working. Rare-earth and calcium additions intensify DRX kinetics, promoting earlier nucleation and effective grain-boundary pinning, which results in a uniform, equiaxed microstructure with enhanced thermal stability.
The alloy’s secondary phases—including Mg–RE, Mg–Ca, Zn–RE, and Mg-Zn compounds—contribute to precipitation hardening and grain-boundary reinforcement, while also improving oxidation resistance through the formation of a stabilized surface oxide film. This microstructural framework underpins REEM™ 6020’s elevated tensile and fatigue strength, dimensional stability under thermal load, and resistance to ignition at elevated temperatures. The combination of fine grain size, robust intermetallic architecture, and stabilized oxide behavior makes REEM™ 6020 well-suited for aerospace and defense applications requiring lightweight, high-strength materials with enhanced thermal durability.
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REEM™ 6020 is a flame-stabilized alloy that must be cast exclusively into feedstock form as its primary manufacturing route. Due to its reactive nature and the need to preserve its RE–Ca–modified intermetallic architecture, direct component casting is not viable. Instead, REEM™ 6020 is engineered for post-processing workflows that begin with controlled feedstock casting—typically into billets, rods, or powder precursors.
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REEM™ 6020 exhibits strong responsiveness to thermal treatment, particularly through solutionizing and aging protocols designed to optimize its mechanical performance. The alloy’s microstructure—anchored by a fine α-Mg matrix and RE–Ca–modified intermetallic phases—can be tuned via controlled heat treatment to enhance strength, ductility, and thermal stability.
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Forging of REEM™ 6020 (from cast or FAST‑consolidated billets) improves toughness, fatigue performance, and dimensional stability. Moderate strain rates help maintain primary and secondary phase stability with little to no grain coarsening. Closed‑die or open‑die forging can achieve near‑net geometries for brackets, housings, and load‑bearing components where strength and rigidity are demanded without the risk of hot cracking. Forging of REEM™ 6020 (from cast or FAST‑consolidated billets) improves toughness, fatigue performance, and dimensional stability. Moderate strain rates help maintain primary and secondary phase stability with little to no grain coarsening. Closed‑die or open‑die forging can achieve near‑net geometries for brackets, housings, and load‑bearing components where strength and rigidity are demanded without the risk of hot cracking.
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REEM™ 6020 demonstrates excellent extrusion behavior. RE additions reduce flow stress and promote uniform DRX, enabling fine grains and high strength. Extrusion processing (equipment agnostic) can be tuned to deliver optimized mechanical properties exceeding the MDS projections through high process ratios (up to 22:1, size dependent) with grain reduction and alignment at an affordable cost.
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Powder‑bed fusion (e.g., SLM) and binder jet routes are applicable but limited to REEM™ 6020 for lattices, conformal channels, and complex internal features not achievable by machining. Parameter optimization focuses on densification, microcrack suppression, and oxidation control. Post isostatic pressing and heat treatment can reduce porosity and optimize mechanical properties. Printed parts can be finish‑machined to final tolerance and surface quality.
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FAST enables rapid densification of AT 6020 powder under simultaneous electrical current and pressure, producing dense billets with refined grains and stable intermetallic phases. FAST is particularly effective as a billet‑consolidation step prior to extrusion or forging. Additive 3D designs are possible through leveraging atomic migration theory, fusing individual sections with expedient cycle times, no interfacial boundary formation, no grain growth, and no post sintering requirements.
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REEM™ 6020 machines cleanly with conventional tooling. The alloy’s inherent lattice structure supports tight tolerances and consistent surface finishes across turning, milling, drilling, and threading with feeds and speeds that drastically exceed modern aluminum machining. Standard coolant and chip‑control practices are sufficient, while post‑machining stress‑relief or peening is typically not required and thermal warpage in micron-tolerance components is nearly nonexistent.
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Weldability is limited and requires compatible filler metals and appropriate shielding gas to preserve oxidation resistance. Pre‑weld cleaning and controlled heat input reduce defect formation and microstructural softening adjacent to the fusion zone. Where practical, designers should prefer mechanical joining or weld‑free architectures; if welding is essential, procedure qualification is recommended.
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REEM™ 6020 is compatible with anodizing, electrophoretic coatings, conversion coatings, and metal plating to enhance corrosion resistance and wear durability. Anodizing improves surface hardness and corrosion resistance; e‑coats offer uniform coverage on complex geometries; conversion coatings promote paint/adhesive bond strength; and nickel, copper, zinc, tin, or chrome plating provides additional wear and corrosion protection. In marine or galvanically aggressive environments, coatings and isolation strategies are recommended to manage corrosion risk.
Forward Avionics Bay Equipment Bracket
A forward avionics‑bay equipment bracket is an ideal aerospace component for REEM™ 6020, combining the need for high structural efficiency, thermal robustness, and flame‑resistant behavior in a compact load‑bearing geometry. These brackets are typically mounted adjacent to environmental control system (ECS) ducts, bleed‑air manifolds, or auxiliary power unit (APU) enclosures, where radiant and convective heat exposure can elevate local temperatures well beyond what conventional magnesium alloys can safely tolerate. REEM™ 6020’s high tensile and yield strengths, paired with its optimized 52–56 GPa elastic modulus, allow designers to reduce wall thickness while maintaining stiffness and dimensional stability under vibration and sustained loading. Its 720–740 °C ignition temperature—significantly higher than standard Mg alloys—provides a critical safety margin in thermally stressed zones, while its RE‑Ca–stabilized oxide film resists oxidation and surface degradation during long‑duration service. Together, these attributes make REEM™ 6020 a compelling choice for next‑generation avionics‑bay brackets where lightweight construction, thermal proximity tolerance, and structural reliability directly influence aircraft performance and maintainability.
Forward Sensor-Suite ElectronicHousing
A forward sensor‑suite electronics housing is an ideal defense component for REEM™ 6020, combining the need for lightweight structural rigidity, thermal robustness, and flame‑resistant behavior in a compact protective enclosure. These housings are typically mounted near power‑distribution modules, targeting processors, or high‑current actuator clusters, where localized heating and continuous vibration can degrade conventional magnesium alloys. REEM™ 6020’s elevated tensile and yield strengths allow designers to reduce wall thickness while maintaining stiffness and dimensional stability under shock, vibration, and sustained mechanical loading. Its 720–740 °C ignition temperature provides a critical safety margin in thermally stressed defense environments, while the RE‑Ca–stabilized oxide film resists oxidation and surface degradation during long‑duration field operation. The alloy’s excellent machinability supports the creation of thin‑wall geometries, integrated mounting rails, and precision‑fit interfaces for gaskets, connectors, and EMI‑shielding features. Together, these attributes make REEM™ 6020 a compelling choice for next‑generation lightweight electronics housings where mass efficiency, thermal tolerance, and structural reliability directly influence system survivability and mission performance.
Front Lower Control Arm Pivot Node
A front lower control‑arm pivot node is an ideal high‑performance automotive component for REEM™ 6020, combining the need for elevated stiffness‑to‑weight efficiency, fatigue resistance, and thermal robustness in a compact structural junction. This node—typically located where the control arm interfaces with the subframe—must withstand high multiaxial loads from braking, cornering, and road impacts while maintaining precise suspension geometry. REEM™ 6020’s high tensile and yield strengths, paired with its optimized 52–56 GPa elastic modulus, allow engineers to reduce wall thickness and mass without compromising rigidity or alignment stability. Its fatigue strength of 171–204 MPa supports long‑duration cyclic loading in performance vehicles, while the alloy’s 720–740 °C ignition temperature and RE‑Ca–stabilized oxide film provide enhanced safety and oxidation resistance near exhaust routing or brake‑heat zones. The alloy’s excellent extrudability and machinability enable thin‑wall, rib‑reinforced node geometries with integrated bushing seats, mounting tabs, and precision‑machined alignment surfaces. Together, these attributes make REEM™ 6020 a compelling material for next‑generation lightweight suspension nodes where stiffness, durability, and mass efficiency directly influence handling performance and vehicle responsiveness.
ElectronicCooling Plate Manifold
A high‑density power‑electronics cooling‑plate manifold is an ideal energy‑sector component for REEM™ 6020, combining the need for lightweight structural rigidity, thermal stability, and flame‑resistant behavior in a heat‑adjacent environment. These manifolds are typically mounted directly beneath insulated‑gate bipolar transistor (IGBT) modules, DC‑fast‑charging converters, or high‑current inverter assemblies, where continuous thermal cycling and localized hot‑spot formation can degrade conventional magnesium alloys. REEM™ 6020’s elevated tensile and yield strengths support thin‑wall, rib‑reinforced geometries that maintain dimensional stability under mechanical clamping loads and vibratory excitation. Its 720–740 °C ignition temperature and RE‑Ca–stabilized oxide film provide a critical safety margin in environments where coolant temperatures, power‑device junction heat, or transient thermal spikes can elevate surface temperatures. The alloy’s thermal conductivity of 100–110 W/m·K enables efficient heat spreading across the manifold body, reducing thermal gradients and improving system reliability. REEM™ 6020’s excellent machinability further supports the creation of precision‑milled coolant channels, manifold ports, and sealing interfaces. Together, these attributes make REEM™ 6020 a compelling material for next‑generation cooling‑plate manifolds where thermal robustness, mass efficiency, and structural reliability directly influence power‑electronics performance and service life