Abstract
Low cost hydride-dehydride (HDH) Ti-6Al-4V (Ti-64) alloy powder was employed to investigate the metallurgical quality and mechanical properties of laser formed samples. With appropriate control of the laser forming processing parameters and the loose density of HDH powder, two kinds of defect, i.e. porosity and ill-bonding, can be avoided. Rare earth Nd powder was added to HDH Ti-64 powder to purify laser formed alloy. The results show that with a few additive of Nd, the microstructure of laser formed alloy changes from Widmanstatten morphology to a basket weave microstructure. Accordingly an appropriate addition of Nd is effective to improve both the strength and ductility of laser formed HDH Ti-64 alloy. The values of tensile test meet the wrought specification with the content of Nd ranging from 0.1% to 0.2% (mass fraction).
| Original language | English |
|---|---|
| Pages (from-to) | 2104-2108 |
| Number of pages | 5 |
| Journal | Transactions of Nonferrous Metals Society of China (English Edition) |
| Volume | 16 |
| Issue number | SUPPL. 3 |
| State | Published - Dec 2006 |
Keywords
- Hydride-dehydride titanium alloy powder
- Laser rapid forming
- Mechanical properties
- Microstructure
- Rare earth Nd