Aluminium-dysprosium Master Alloy，Aluminium dysprosium Alloy，Aldy Alloy，E FORU

**Product Datasheet: Aluminium-Dysprosium Master Alloy (Al-Dy Alloy)** **Version:** 1.0 | **Date:** 2025-04-02 --- ### **1. General Overview** Aluminium-Dysprosium Master Alloy (Al-Dy Alloy) is a specialized rare earth-containing master alloy used to introduce dysprosium into aluminium alloy systems. Dysprosium, as a heavy rare earth element, provides unique properties including enhanced high-temperature strength, improved corrosion resistance, and neutron absorption capabilities. This master alloy finds applications in specialized nuclear, aerospace, and high-performance engineering sectors. --- ### **2. International Standards** Al-Dy master alloys are referenced in several international specifications: - **ASTM:** ASTM B928 (High Magnesium Aluminum-Alloy Products) - **AMS:** AMS 4459 (Aluminum-Dysprosium Alloy Sheet) - **GB/T:** GB/T 27677 (Aluminium-rare earth master alloys) - **AWS:** A5.10 (Aluminum Alloy Filler Metals) - **Typical Master Alloy Grades:** Al-5%Dy, Al-10%Dy, Al-15%Dy --- ### **3. Chemical Composition (Weight %)** Typical composition ranges for Al-Dy master alloy: | Element | Content (%) | Role & Remarks | |------------------|-------------------|------------------------------------------| | Dysprosium (Dy) | 2.0 – 20.0 | Primary rare earth element | | Other RE Elements| ≤ 2.0 | May include Y, Gd, Er | | Iron (Fe) | ≤ 0.20 | Impurity control | | Silicon (Si) | ≤ 0.15 | Impurity control | | Copper (Cu) | ≤ 0.05 | Impurity control | | Other Impurities | ≤ 0.10 total | — | | Aluminium (Al) | Balance | Base metal | --- ### **4. Physical Properties** | Property | Value / Range | |---------------------------|-----------------------------------| | Density | 2.8 – 3.5 g/cm³ | | Melting Range | 650 – 850°C | | Intermetallic Phases | Al₃Dy, Al₄Dy | | Thermal Neutron Cross Section | 950 barns | | Thermal Conductivity | 90 – 130 W/m·K | | Electrical Conductivity | 25 – 40 % IACS | --- ### **5. Key Characteristics & Advantages** - **Neutron Absorption:** High thermal neutron capture cross-section for nuclear applications - **High-Temperature Stability:** Maintains strength at elevated temperatures - **Corrosion Resistance:** Enhances resistance to various corrosive environments - **Grain Refinement:** Improves microstructure through intermetallic formation - **Magnetic Properties:** Can impart specific magnetic characteristics --- ### **6. Product Applications** - **Nuclear Industry:** Neutron shielding components, control rod alloys - **Aerospace:** High-temperature structural components - **Military:** Radiation shielding for specialized equipment - **Research:** Neutron scattering experiments and nuclear research - **Additive Manufacturing:** Specialty powders for high-performance 3D printing - **Magnetic Alloys:** Components requiring specific magnetic properties --- ### **7. Available Forms** - **Master Alloy:** Ingots, notch bars, granules - **Special Forms:** Powder for additive manufacturing, custom shapes - **Standard Sizes:** 2–10 kg ingots (limited production volumes) --- ### **8. Technical Guidelines for Use** - **Addition Rate:** 0.1–2.0% Dy to the melt (depending on application) - **Melt Temperature:** 730–800°C - **Holding Time:** 30–60 minutes for complete dissolution - **Stirring:** Requires thorough mechanical stirring - **Atmosphere:** Preferable under protective atmosphere --- ### **9. Metallurgical Effects** - Forms stable Al₃Dy intermetallic compounds - Provides dispersion strengthening at elevated temperatures - Refines grain structure through heterogeneous nucleation - Enhances recrystallization temperature - Improves high-temperature creep resistance --- ### **10. Nuclear Properties** | Property | Value | |---------------------------|---------------------------| | Thermal Neutron Cross Section | 950 barns | | Resonance Integral | 1200 barns | | Half-Life | Stable isotope | | Decay Mode | Not applicable | --- ### **11. Quality Control Parameters** - Dysprosium content consistency (±0.5%) - Low gas content certification - Homogeneous microstructure - Trace element analysis - Radioactivity verification --- ### **12. Health, Safety & Handling** - **Low Radioactivity:** Naturally occurring dysprosium has low radioactivity - **Dust Precautions:** Avoid inhalation of fine particles - **Personal Protection:** Standard foundry PPE required - **Storage:** Dry, controlled environment - **Disposal:** Follow standard metal disposal protocols --- ### **13. Supply Considerations** - **Limited Availability:** Dysprosium is a critical rare earth element - **Cost Factors:** Higher cost compared to common master alloys - **Strategic Material:** Subject to supply chain considerations - **Recycling:** Important to recover and recycle from scrap --- ### **14. Performance Advantages** | Application Area | Benefit | Key Advantage | |------------------|---------|---------------| | **Nuclear Shielding** | High neutron absorption | Weight efficiency | | **High-Temperature** | Thermal stability | Strength retention | | **Corrosion Service** | Oxide film enhancement | Long-term durability | | **Research** | Neutron interaction | Experimental flexibility | --- ### **Disclaimer** This information is provided for technical reference only. Properties and performance may vary based on specific application conditions. Due to the specialized nature and cost of dysprosium-containing alloys, users are advised to conduct thorough testing and economic evaluation before implementation. Always follow appropriate safety guidelines and regulatory requirements for rare earth materials.

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 2290 gallon liquid totes Special package is available on request.