Microstructural control in a Ti-based alloy by changing laser processing mode and power during direct laser deposition
Research output: Contribution to journal › Article › peer-review
Authors
Colleges, School and Institutes
Abstract
Ti-6Al-4V samples have been fabricated by direct laser deposition using different laser powers and two different laser processing modes, continuous wave (CW) mode and CW+PW (pulsed wave) mode. The as-fabricated microstructure was investigated using photography, optical microscopy and secondary electron microscopy. It was found that both laser mode and laser power show significant influence on grain structure. The CW mode generally leads to well-developed large columnar grains whereas the CW+PW mode tends to give rise to much finer equiaxed grains. Higher laser power was found to result in larger grains and coarser microstructure.
Details
Original language | English |
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Pages (from-to) | 104-108 |
Number of pages | 5 |
Journal | Materials Letters |
Volume | 179 |
Early online date | 12 May 2016 |
Publication status | Published - 15 Sep 2016 |
Keywords
- Direct Laser Deposition, Laser Mode, Microstructure, Ti-6Al-4V