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) | ksi | 20°C · annealed 704 °C · XZ (horizontal) | ||
| ↳ | Curve (23 pts) | ksi | 20°C · annealed 704 °C · Z (vertical) | ||
| ↳ | Curve (22 pts) | ksi | 20°C · annealed 704 °C · 45° to Z | ||
| ↳ | Curve (19 pts) | ksi | 20°C · specimen ASTM E8, machined after heat treatment · annealed 704 °C, 2 h · Z (vertical cylinder | ||
Ultimate Tensile Strength(σUTS)4 entries | 153.6 range 153.3–153.9 | ksi | 20°C · annealed 704 °C · XZ (horizontal) | ||
| ↳ | 151.3 range 149.2–153.3 | ksi | 20°C · annealed 704 °C · Z (vertical) | ||
| ↳ | 148.2 range 146.8–149.7 | ksi | 20°C · annealed 704 °C · 45° to Z | ||
| ↳ | 176.5 range 174.6–178.4 | ksi | 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 | 144.6 range 141.6–147.6 | ksi | 20°C · annealed 704 °C · XZ (horizontal) | ||
| ↳ | 141.3 range 140–142.6 | ksi | 20°C · annealed 704 °C · Z (vertical) | ||
| ↳ | 137.6 range 134.4–140.8 | ksi | 20°C · annealed 704 °C · 45° to Z | ||
| ↳ | 171.9 range 169.7–174 | ksi | 20°C · specimen ASTM E8, machined after heat treatment · annealed 704 °C, 2 h · Z (vertical cylinder |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.1586 range 0.1585–0.1587 | lb/in³ | 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