Ti-3Al-8V-6Cr-4Mo-4Zr (Beta C)
About Ti-3Al-8V-6Cr-4Mo-4Zr (Beta C) Superalloy
Name and Equivalent Name
Ti-3Al-8V-6Cr-4Mo-4Zr, Beta C, conforms to UNS R58010, ASTM B348, AMS 4981, and GB/T 3621: TA23 standards. It is recognized for its exceptional performance under stress and corrosion resistance.
Ti-3Al-8V-6Cr-4Mo-4Zr (Beta C) Basic Introduction
Ti-3Al-8V-6Cr-4Mo-4Zr (Beta C) is a beta-phase titanium alloy known for its high tensile strength, excellent fatigue resistance, and corrosion protection. It provides superior mechanical properties, even in moderately high temperatures ranging from 200°C to 315°C.
This alloy is widely used in aerospace, marine, and industrial applications where strength, durability, and resistance to harsh environments are required. Its ability to maintain long-term performance under cyclic stress makes it popular for critical components in engines, chemical reactors, and structural frameworks.
Alternative Superalloys of Ti-3Al-8V-6Cr-4Mo-4Zr (Beta C)
Alternative alloys include Ti-6Al-4V, providing better weldability but slightly lower strength. Ti-5Al-2.5Sn offers improved high-temperature stability but lacks the same level of corrosion resistance.
Inconel 718 can be considered for extreme temperature applications but comes at a higher cost and added weight. Ti-10V-2Fe-3Al is another alternative, providing similar strength with slightly better machinability. These alternatives can be chosen based on specific project requirements and operating environments.
Ti-3Al-8V-6Cr-4Mo-4Zr (Beta C) Design Intention
Ti-3Al-8V-6Cr-4Mo-4Zr (Beta C) was developed to provide a titanium alloy with excellent strength, fatigue resistance, and corrosion protection. Its design ensures reliable performance in environments with repeated stress and moderate temperatures.
The alloy aims to deliver lightweight components without compromising durability, making it suitable for aerospace, marine, and chemical industries. Its high fatigue resistance ensures that it can withstand cyclic loading over extended periods, enhancing the longevity of components.
Ti-3Al-8V-6Cr-4Mo-4Zr (Beta C) Chemical Composition
The chemical composition of Ti-3Al-8V-6Cr-4Mo-4Zr ensures optimal strength, corrosion resistance, and performance under stress.
Element | Content (wt%) |
|---|---|
Aluminum (Al) | 2.5 – 4.5 |
Vanadium (V) | 7.5 – 9.0 |
Chromium (Cr) | 5.5 – 7.5 |
Molybdenum (Mo) | 3.0 – 5.0 |
Zirconium (Zr) | 3.5 – 5.0 |
Silicon (Si) | ≤ 0.10 |
Ti-3Al-8V-6Cr-4Mo-4Zr (Beta C) Physical Properties
Ti-3Al-8V-6Cr-4Mo-4Zr offers excellent thermal conductivity and high tensile strength, making it suitable for challenging industrial applications.
Property | Value |
|---|---|
Density | 4.83 g/cm³ |
Melting Point | 1670°C |
Thermal Conductivity | 7.5 W/(m·K) |
Elastic Modulus | 110 GPa |
Metallographic Structure of Ti-3Al-8V-6Cr-4Mo-4Zr (Beta C) Superalloy
Ti-3Al-8V-6Cr-4Mo-4Zr is primarily a beta-phase alloy known for its strength and flexibility. The beta-phase structure provides enhanced fatigue resistance, ensuring that components made from this alloy maintain structural integrity under cyclic loads.
The alloy can be heat-treated to modify its microstructure, enhancing properties such as tensile strength and creep resistance. The presence of zirconium further improves corrosion resistance, making it suitable for use in chemically aggressive environments.
Ti-3Al-8V-6Cr-4Mo-4Zr (Beta C) Mechanical Properties
Even at moderately high temperatures, the alloy offers superior mechanical performance, with excellent tensile and yield strength.
Property | Value |
|---|---|
Tensile Strength | 1000 – 1200 MPa |
Yield Strength | 950 – 1050 MPa |
Hardness | 36 – 38 HRC |
Elongation | 10 – 15% |
Key Features of Ti-3Al-8V-6Cr-4Mo-4Zr (Beta C) Superalloy
High Tensile Strength Ti-3Al-8V-6Cr-4Mo-4Zr offers excellent tensile strength, ensuring reliable performance under mechanical stress in aerospace and marine environments.
Exceptional Fatigue Resistance The alloy is designed to withstand cyclic loading, making it ideal for structural components that experience repetitive stress over time.
Corrosion Resistance With the addition of zirconium, Ti-3Al-8V-6Cr-4Mo-4Zr provides enhanced resistance to corrosion, making it suitable for chemical processing and marine applications.
Thermal Stability The alloy maintains its mechanical properties at temperatures up to 315°C, ensuring long-term reliability in moderate-temperature environments.
Versatility Across Industries Ti-3Al-8V-6Cr-4Mo-4Zr is used in aerospace, marine, chemical, and industrial applications due to its strength, fatigue resistance, and corrosion protection.
Ti-3Al-8V-6Cr-4Mo-4Zr (Beta C) Superalloy’s Machinability
Vacuum Investment Casting: Ti-3Al-8V-6Cr-4Mo-4Zr (Beta C) is generally unsuitable for Vacuum Investment Casting due to its high beta-phase content, which reduces castability and increases the risk of defects during solidification.
Single Crystal Casting: Single Crystal Casting does not apply to Beta C alloy, as it is not intended for single-crystal structures but equiaxed and beta-rich microstructures for enhanced fatigue resistance.
Equiaxed Crystal Casting: Equiaxed Crystal casting suits Beta C, ensuring uniform grain structures and contributing to excellent fatigue resistance and mechanical performance.
Superalloy Directional Casting: Superalloy Directional Casting is less practical for this alloy, as Ti-3Al-8V-6Cr-4Mo-4Zr performs best with equiaxed microstructures rather than oriented grains for high creep resistance.
Powder Metallurgy Turbine Disc: Ti-3Al-8V-6Cr-4Mo-4Zr is not widely used in Powder Metallurgy Turbine Disc production, as the alloy is optimized for fatigue-critical applications rather than extreme high-temperature environments.
Superalloy Precision Forging: Superalloy Precision Forging is effective for Beta C, enhancing its mechanical properties through controlled grain refinement and being ideal for aerospace and industrial applications.
Superalloy 3D Printing: Ti-3Al-8V-6Cr-4Mo-4Zr (Beta C) can be used in Superalloy 3D Printing but requires advanced printing techniques to manage residual stress and achieve optimal properties.
CNC Machining: CNC Machining of Beta C is achievable with proper tooling and cooling techniques, making it suitable for producing high-precision components.
Superalloy Welding: Superalloy Welding is feasible with Ti-3Al-8V-6Cr-4Mo-4Zr, but careful control of heat input is required to avoid cracking and maintain mechanical integrity.
Hot Isostatic Pressing (HIP): Hot Isostatic Pressing (HIP) improves the fatigue strength of Beta C alloy by eliminating internal porosity and refining the microstructure.
Ti-3Al-8V-6Cr-4Mo-4Zr (Beta C) Superalloy Applications
Aerospace and Aviation: In Aerospace and Aviation, Beta C alloy is used for landing gear, fasteners, and structural components due to its high strength and fatigue resistance.
Power Generation: In power generation, it is applied to turbine casings and high-pressure components, offering mechanical stability under cyclic thermal loads.
Oil and Gas: The Oil and Gas industry uses Beta C in pipelines, valves, and offshore components for its corrosion resistance and mechanical strength under pressure.
Energy: In Energy applications, it supports structural components in renewable energy systems such as wind turbines, ensuring durability under continuous stress.
Marine: The marine sector benefits from Beta C’s corrosion resistance, which is used in propeller shafts and other submerged components.
Mining: In Mining, Beta C is used for wear-resistant components like drill bits and pump housings, ensuring long-term performance in abrasive environments.
Automotive: Automotive applications include connecting rods, fasteners, and suspension components, where strength-to-weight ratio is critical for performance.
Chemical Processing: Chemical Processing is employed in reactors and heat exchangers, offering resistance to aggressive chemicals and mechanical stress.
Pharmaceutical and Food: Due to its corrosion resistance, the Pharmaceutical and Food industries use Beta C alloy for hygienic processing equipment, such as mixers and valves.
Military and Defense: In Military and Defense, Beta C is used for lightweight armor plating and structural components, ensuring durability under extreme conditions.
Nuclear: The Nuclear sector employs Beta C in reactor components and radiation-resistant structures, benefiting from its mechanical stability and corrosion resistance.
When to Choose Ti-3Al-8V-6Cr-4Mo-4Zr (Beta C) Superalloy
Custom superalloy parts made from Ti-3Al-8V-6Cr-4Mo-4Zr (Beta C) are ideal when high strength, fatigue, and corrosion resistance are essential. This alloy is best suited for aerospace, automotive, and industrial applications where long-term performance under cyclic loads is critical. Beta C’s ability to maintain mechanical stability at moderate temperatures makes it an excellent choice for marine and chemical processing environments. Additionally, its weldability and compatibility with precision forging allow it to be used in complex components, ensuring reliability in demanding operations.
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