Abstract
The laser metal deposition (LMD) process is an additive manufacturing process that can produce three-dimensional parts through material addition. LMD is still fairly new and some of the physics of the process is not fully understood. The experiment was conducted on the ytterbium laser system (YLS) with a maximum power of 3 kW. However, in this study, the influence of process parameters on the laser metal-deposited titanium alloy grade 5 with 10 wt. %molybdenum (Ti-6Al-4V-Mo) on titanium alloy substrate was carefully investigated through the microstructural analysis and microhardness profiling. The scanning speed used for the deposition process was varied from 0.5 m/min to 1.5 m/min while other parameters remain constant. In the microstructural analysis, elongated grains were observed in the entire deposits as a result of the density of the Mo stabilizer. Some unmelted Mo was also observed in the deposited alloy due to the high melting point of Mo. In the microhardness analysis, sample 1 deposited at a scanning speed of 0.5 m/min exhibited the lowest hardness value with the standard deviation of HV 327 ± 26, and this has contributed to the improvement in the ductility of the deposited Ti-6Al-4V-Mo alloy.
| Original language | English |
|---|---|
| Title of host publication | Advanced Composites in Aerospace Engineering Applications |
| Editors | Norkhairunnisa Mazlan, S.M. Sapuan, R.A. Ilyas |
| Place of Publication | Cham, Switzerland |
| Publisher | Springer |
| Chapter | 22 |
| Pages | 435-443 |
| Number of pages | 9 |
| Edition | 1st |
| ISBN (Electronic) | 9783030881924 |
| ISBN (Print) | 9783030881917, 9783030881948 |
| DOIs | |
| Publication status | Published - 22 Feb 2022 |
| Externally published | Yes |
Keywords
- Microhardness
- Microstructure
- Molybdenum
- Surface response analysis
- Titanium alloy