Basic physical properties of titanium alloys
Density
1. Quantitative indicator: 4.40-4.50 g/cm ³
2. Application scenario: In the aerospace field, low density helps to reduce the structural weight of aircraft and spacecraft.
Elastic Modulus
1. Quantitative indicator: 110-120 GPa
2. Application scenario: In applications that require elastic response, such as springs and structural components, a moderate elastic modulus can provide good stress-strain response.
Yield Strength and Tensile Strength
1. Quantitative indicators: yield strength 380-1100 MPa, tensile strength 900-1400 MPa
2. Application scenario: The high-strength characteristics make titanium alloy suitable for mechanical components that can withstand high loads, such as engine components and high-strength fasteners.
Hardness
1. Quantitative indicator: Vickers hardness 200-500 HV
2. Application scenario: Wear resistant components such as bearings and gears require high surface hardness to resist wear.
Resilience
1. Quantitative indicator: Charpy impact value of 20-100 J/cm ²
2. Application scenario: In applications that require materials to absorb impact energy, such as automotive collision energy absorbing components.
Thermal Conductivity
1. Quantitative indicator: 6-22 W/m · K
2. Application scenario: In components that require control of heat transfer, such as heat sinks in electronic devices.
Coefficient of Thermal Expansion
1. Quantitative indicators: 8-12 × 10 ⁻⁶ K ⁻¹
2. Application scenario: In precision instruments and equipment, low thermal expansion coefficient helps maintain dimensional stability.
Melting Point
1. Quantitative indicator: Pure titanium is approximately 1668 ° C
2. Application scenario: In components that require high-temperature processing or use, such as heating elements for certain furnaces.
Specific Heat Capacity
1. Quantitative indicator: 520-700 J/kg · K
2. Application scenario: In thermal energy storage and transmission systems, specific heat capacity affects the ability of materials to absorb and release heat.
Electrical Conductivity
1. Quantitative indicator: approximately 1.2 × 10 ⁻⁷ S/m
2. Application scenario: Although titanium alloys are not good electrical conductors, they may be sufficient for certain electromagnetic shielding applications.
Fatigue Limit
1. Quantitative indicator: able to withstand cyclic stress up to 70-80% tensile strength
2. Application scenario: In applications that undergo repeated loading and unloading, such as aircraft wing beams and automotive suspension systems.
Superplasticity
1. Quantitative indicator: Under specific conditions, it can achieve extremely high scalability
2. Application scenario: In applications that require complex shape forming, such as net forming of aerospace components.
From lightweight and high-strength aerospace components to highly corrosion-resistant chemical equipment, the diversity and performance advantages of titanium alloys make them an important material for many high-end applications. With the development of technology, the application scope of titanium alloys is expected to further expand.
