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Ensuring the safety and reliability of C103 in space additive manufacturing
The safety and reliability assurance system of C103 niobium-hafnium alloy in space additive manufacturing includes the following key technical links:
1. Full process control
| Control stage | Key technical measures | Implementation standards |
| Powder preparation | - Oxygen content control <300ppm - Sphericity >95% |
ASTM B964 |
| Forming process | - Laser power fluctuation ±1.5% - Layer thickness error <5μm |
TNASA-STD-6032 |
| Post-processing | NHIP densification (1,150°C/100MPa/4h) Electrolytic polishing Ra <0.8μm |
AMS 4999A |
• Multi-physics simulation: By integrating the thermal-structural-fluid coupling model, the deformation behavior of the component under vacuum thermal cycle (-150°C to 1,200°C) is predicted with an accuracy of ±3%1
• Process digital twin: Establish a dynamic monitoring system for laser molten pool, collect 300+ parameters such as molten pool temperature (sampling rate 1MHz), number of spatter particles, etc. in real time
3. Advanced detection technology
Key quality indicator detection:
• X-ray CT detection: resolution of 5μm, can identify internal defects
• Laser ultrasonic detection: surface crack detection rate > 99.9%
• Residual stress analysis: neutron diffraction method measures stress distribution in depth
4. Extreme environment verification
Typical verification projects:
1. Thermal vacuum test:
• Simulate GEO orbit environment (10-6 Pa, ±150°C cycle)
• Pass standard: 500 cycles without performance degradation
2. Atomic oxygen erosion test:
• Flow rate 2×1015 atoms/cm2·s, cumulative exposure 1,000 hours
• Mass loss rate <0.1mg/cm2
3. Vibration fatigue test:
• Random vibration spectrum 20-2000Hz, total RMS acceleration 15Grms
• Pass standard: 5 minutes on each of the 3 axes with no structural damage