Ti-6Al-2Sn-4Zr-6Mo
About Ti-6Al-2Sn-4Zr-6Mo Superalloy
Name and Equivalent Name
Ti-6Al-2Sn-4Zr-6Mo, known as Titanium Grade 6Al-2Sn-4Zr-6Mo, conforms to UNS R56620, ASTM B348, B265, F468, DIN/EN 3.7175, ISO 5832-6, AMS 4965, and NACE MR0175 standards. It is widely used in aerospace and industrial applications due to its high mechanical strength and resistance to fatigue at high temperatures.
Ti-6Al-2Sn-4Zr-6Mo Basic Introduction
Ti-6Al-2Sn-4Zr-6Mo is a titanium alloy used in high-stress environments, offering excellent fatigue resistance, mechanical strength, and thermal stability. The alloy performs reliably at elevated temperatures, maintaining its properties up to 500°C, making it ideal for aerospace components and other applications exposed to cyclic thermal loads.
With high tensile strength and excellent resistance to creep, this alloy is used in engines, airframes, and structural components. Its corrosion resistance and fatigue performance make it a preferred choice in demanding applications, ensuring long-lasting durability under continuous stress.
Alternative Superalloys of Ti-6Al-2Sn-4Zr-6Mo
Alternatives include Ti-6Al-4V, which offers improved weldability but slightly lower high-temperature performance. Ti-5Al-5V-5Mo-3Cr (Ti5553) provides enhanced fatigue resistance but may be more challenging to process.
Inconel 718 is used for extreme temperature environments but adds weight and complexity. Ti-10V-2Fe-3Al offers better machinability with high strength but is more suited for lower-temperature applications than Ti-6Al-2Sn-4Zr-6Mo.
Ti-6Al-2Sn-4Zr-6Mo Design Intention
Ti-6Al-2Sn-4Zr-6Mo was designed to perform exceptionally in high-temperature environments, maintaining strength and fatigue resistance under cyclic thermal loads. Its development aimed to meet the needs of aerospace and high-performance industries, ensuring long-term reliability in challenging applications.
The design balances weight, strength, and corrosion resistance, making it ideal for critical aerospace components such as engine parts and airframes. Its high-temperature capabilities allow it to withstand operating conditions where other materials may degrade over time.
Ti-6Al-2Sn-4Zr-6Mo Chemical Composition
The carefully formulated chemical composition of Ti-6Al-2Sn-4Zr-6Mo enhances its mechanical properties and resistance to high-temperature fatigue.
Element | Content (wt%) |
|---|---|
Aluminum (Al) | 5.5 – 6.75 |
Tin (Sn) | 1.75 – 2.25 |
Zirconium (Zr) | 3.5 – 5.0 |
Molybdenum (Mo) | 5.0 – 6.0 |
Iron (Fe) | ≤ 0.20 |
Ti-6Al-2Sn-4Zr-6Mo Physical Properties
Ti-6Al-2Sn-4Zr-6Mo’s physical properties ensure reliability in demanding environments, particularly at elevated temperatures.
Property | Value |
|---|---|
Density | 4.55 g/cm³ |
Melting Point | 1660°C |
Thermal Conductivity | 7 W/(m·K) |
Elastic Modulus | 110 – 115 GPa |
Metallographic Structure of Ti-6Al-2Sn-4Zr-6Mo Superalloy
Ti-6Al-2Sn-4Zr-6Mo is a near-alpha titanium alloy, offering a stable microstructure that ensures excellent high-temperature performance. The alloy's metallographic structure allows it to maintain strength and fatigue resistance at temperatures up to 500°C, making it suitable for critical aerospace applications.
Adding zirconium and molybdenum enhances the alloy’s resistance to creep, while the aluminum and tin improve its oxidation resistance. This microstructural composition ensures durability and performance in cyclic loading conditions.
Ti-6Al-2Sn-4Zr-6Mo Mechanical Properties
The mechanical properties of Ti-6Al-2Sn-4Zr-6Mo make it a reliable choice for high-stress and high-temperature applications.
Property | Value |
|---|---|
Tensile Strength | ~1050 MPa |
Yield Strength | 950 MPa |
Hardness | 35 – 40 HRC |
Elongation | ~10% |
Key Features of Ti-6Al-2Sn-4Zr-6Mo Superalloy
High-Temperature Fatigue Resistance Ti-6Al-2Sn-4Zr-6Mo maintains excellent fatigue resistance up to 500°C, ensuring reliability under cyclic loading conditions.
Superior Creep Resistance The alloy offers outstanding resistance to creep, making it ideal for aerospace engine components subjected to high stress and temperatures.
High Strength-to-Weight Ratio Ti-6Al-2Sn-4Zr-6Mo provides significant strength without adding unnecessary weight, enhancing performance in aerospace applications.
Thermal Stability Its metallurgical composition ensures stability and performance in high-temperature environments, making it ideal for engines and structural frameworks.
Corrosion Resistance The alloy offers excellent resistance to oxidation and corrosion, ensuring durability in harsh environments and reducing maintenance requirements.
Ti-6Al-2Sn-4Zr-6Mo Superalloy’s Machinability
Vacuum Investment Casting: Ti-6Al-2Sn-4Zr-6Mo is generally not ideal for Vacuum Investment Casting due to its tendency to form alpha-case contamination during casting, impacting surface quality and mechanical properties.
Single Crystal Casting: Single Crystal Casting does not apply to Ti-6Al-2Sn-4Zr-6Mo as it is optimized for near-alpha phase structures rather than single-crystal formations.
Equiaxed Crystal Casting: Equiaxed Crystal casting is suitable for this alloy, producing uniform grains that enhance fatigue resistance and mechanical stability.
Superalloy Directional Casting: Superalloy Directional Casting is less favored for Ti-6Al-2Sn-4Zr-6Mo as the alloy’s primary benefits are achieved through equiaxed or near-alpha microstructures.
Powder Metallurgy Turbine Disc: Ti-6Al-2Sn-4Zr-6Mo is not typically employed in Powder Metallurgy Turbine Disc production since it performs better in forged or machined forms for fatigue-critical aerospace components.
Superalloy Precision Forging: Superalloy Precision Forging enhances the mechanical properties of Ti-6Al-2Sn-4Zr-6Mo, making it an excellent choice for aerospace applications requiring high strength and fatigue resistance.
Superalloy 3D Printing: Superalloy 3D Printing is feasible but challenging for Ti-6Al-2Sn-4Zr-6Mo due to the need for precise control of residual stresses to prevent microstructural defects.
CNC Machining: CNC Machining of Ti-6Al-2Sn-4Zr-6Mo is efficient with appropriate cooling techniques, producing precise aerospace components.
Superalloy Welding: Superalloy Welding of Ti-6Al-2Sn-4Zr-6Mo requires careful control to prevent cracking due to its sensitivity to heat input, though feasible with proper procedures.
Hot Isostatic Pressing (HIP): Hot Isostatic Pressing (HIP) enhances the alloy’s fatigue life and mechanical performance by eliminating internal porosities.
Ti-6Al-2Sn-4Zr-6Mo Superalloy Applications
Aerospace and Aviation: In Aerospace and Aviation, this alloy is used for airframe structures and engine components due to its high strength and fatigue resistance at elevated temperatures.
Power Generation: In Power Generation, Ti-6Al-2Sn-4Zr-6Mo finds applications in turbines and heat exchangers, providing mechanical stability under high-temperature conditions.
Oil and Gas: Oil and Gas industries use this alloy for pipelines, valves, and other equipment that demands corrosion resistance and durability under pressure.
Energy: In Energy systems, Ti-6Al-2Sn-4Zr-6Mo supports components exposed to high temperatures and cyclic stress, ensuring operational reliability.
Marine: The marine sector benefits from the alloy’s corrosion resistance, which is used in propeller shafts and submerged components for long-term durability.
Mining: In Mining, Ti-6Al-2Sn-4Zr-6Mo is used for high-wear components like drill bits and pump housings, ensuring excellent mechanical performance.
Automotive: Automotive industries leverage the alloy’s high strength-to-weight ratio for critical parts such as suspension systems and engine components.
Chemical Processing: In Chemical Processing, this alloy is applied in reactors and pipelines to resist aggressive chemicals and high temperatures.
Pharmaceutical and Food: Due to its corrosion resistance, the Pharmaceutical and Food sectors utilize the alloy for hygienic processing equipment, including valves and mixers.
Military and Defense: In Military and Defense, Ti-6Al-2Sn-4Zr-6Mo is used in lightweight armor and aerospace components, providing durability under extreme conditions.
Nuclear: The Nuclear sector employs this alloy in radiation-resistant components and reactor parts for its mechanical stability and corrosion resistance.
When to Choose Ti-6Al-2Sn-4Zr-6Mo Superalloy
Custom superalloy parts made from Ti-6Al-2Sn-4Zr-6Mo are essential for aerospace and power generation industries where fatigue resistance and high-temperature performance are critical. It is instrumental in engine components and airframe structures exposed to cyclic stress and elevated temperatures. The alloy's corrosion resistance also makes it ideal for marine and chemical processing applications. CNC machining and precision forging are recommended fabrication methods for applications requiring precision and high strength to ensure optimal performance.
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