Ti-6Al-4V made by laser powder bed fusion and annealed at 704 °C is the alpha-beta titanium alloy in a stress-relieved condition. As printed, the rapid melting and cooling leave a fine acicular martensitic microstructure, high residual stress, some anisotropy between build directions, and a rough surface, with supports needed. The anneal relieves most of the residual stress and starts to break down the martensite into an alpha-beta structure, improving ductility and dimensional stability. It does not close porosity or smooth the surface, so hot isostatic pressing or machining is often added for fatigue-critical parts. Typical uses are aerospace brackets and lightweight structural parts.
Compliance & Regulations
4 interactive curves for this material
Stress-strain, S-N fatigue and environmental knockdown curves are free with an account.
Create free account| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Elongation at Break(εf)4 entries | 11.00 range 9.000–13.00 | % | 20°C · annealed 704 °C · XZ (horizontal) | ||
| ↳ | 11.00 range 10.00–12.00 | % | 20°C · annealed 704 °C · Z (vertical) | ||
| ↳ | 11.00 range 10.00–12.00 | % | 20°C · annealed 704 °C · 45° to Z | ||
| ↳ | 8.700 range 7.400–10.00 | % | 20°C · specimen ASTM E8, machined after heat treatment · annealed 704 °C, 2 h · Z (vertical cylinder | ||
Stress–Strain Curve(σ–ε)4 entries | Curve (23 pts) | Pa | 20°C · annealed 704 °C · XZ (horizontal) | ||
| ↳ | Curve (23 pts) | Pa | 20°C · annealed 704 °C · Z (vertical) | ||
| ↳ | Curve (22 pts) | Pa | 20°C · annealed 704 °C · 45° to Z | ||
| ↳ | Curve (19 pts) | Pa | 20°C · specimen ASTM E8, machined after heat treatment · annealed 704 °C, 2 h · Z (vertical cylinder | ||
Ultimate Tensile Strength(σUTS)4 entries | 1.059 range 1.057–1.061 | GPa | 20°C · annealed 704 °C · XZ (horizontal) | ||
| ↳ | 1.043 range 1.029–1.057 | GPa | 20°C · annealed 704 °C · Z (vertical) | ||
| ↳ | 1.022 range 1.012–1.032 | GPa | 20°C · annealed 704 °C · 45° to Z | ||
| ↳ | 1.217 range 1.204–1.230 | GPa | 20°C · specimen ASTM E8, machined after heat treatment · annealed 704 °C, 2 h · Z (vertical cylinder | ||
Yield Strength (0.2% offset)(σy)4 entries | 997.0 range 976.0–1018 | MPa | 20°C · annealed 704 °C · XZ (horizontal) | ||
| ↳ | 974.0 range 965.0–983.0 | MPa | 20°C · annealed 704 °C · Z (vertical) | ||
| ↳ | 949.0 range 927.0–971.0 | MPa | 20°C · annealed 704 °C · 45° to Z | ||
| ↳ | 1.185 range 1.170–1.200 | GPa | 20°C · specimen ASTM E8, machined after heat treatment · annealed 704 °C, 2 h · Z (vertical cylinder |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 4.390 range 4.386–4.394 | kg/m³ | 20°C · specimen ASTM E8, machined after heat treatment · annealed 704 °C, 2 h · Z (vertical cylinder |
Reference data from cited sources. Not verified or certified by MatWorld Inc. Verify against the source before use in design. Terms: engineering data