Aluminum alloy 4220 is a high-strength aluminum alloy with aluminum and silicon as the main alloying elements. Due to its high strength, good heat resistance, and comprehensive performance, it is widely used in aerospace, automotive, and machinery industries. This article mainly shares the additive manufacturing capability analysis of aluminum alloy 4220 using arc additive manufacturing.
01. Material Information
Material Form: Wire
Material Specification: φ1.2 mm
Model: ZL4220A
Features Overview: It possesses good mechanical properties, high strength, corrosion resistance, and heat resistance, meeting the high requirements of additive manufacturing processes and performance.
02. Performance Indicators
| Condition | Direction | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Vickers Hardness |
| AD-As Deposited | TD-Transverse | 137 | 78 | 19.3 | 60 |
| AD-As Deposited | BD-Longitudinal | 132 | 74 | 15.5 | 60 |
| HT-Heat Treated | TD-Transverse | 327 | 281 | 9.4 | 114 |
| HT-Heat Treated | BD-Longitudinal | 327 | 278 | 9.9 | 114 |
03. Microstructure
04. Composition Analysis
| Component Name | Pre-deposition Content (%) | Component Name | Post-deposition Content (%) |
| Si | 6.5-7.5 | Si | 6.96 |
| Fe | 0.2 | Fe | 0.15 |
| Cu | 0.2 | Cu | 0.003 |
| Mn | 0.1 | Mn | 0.001 |
| Mg | 0.45-0.8 | Mg | 0.41 |
| Ti | 0.1-0.2 | Ti | 0.1 |
| V | - | V | 0.018 |
| Be | 0-0.07 | Zr | 0.001 |
| Al | Rem (Remainder) | Al | Rem (Remainder) |
05. Additive Manufacturing Capability Analysis
Porosity Tendency: ZL4220 wire has high porosity sensitivity, easily generating porosity during the additive manufacturing process, requiring strict control of ambient temperature and humidity.
Crack Sensitivity: Low crack sensitivity, not prone to crack formation.
Flowability: Good flowability, not prone to incomplete fusion.
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