Journal
JOURNAL OF MANUFACTURING PROCESSES
Volume 35, Issue -, Pages 651-656Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jmapro.2018.09.018
Keywords
Ti6Al4V; Boron; Direct laser deposition; Grain refinement; Microhardness
Categories
Funding
- Defence Materials Technology Centre (DMTC)
- Australian Research Council Discovery Program
- ARC Research Hub for Advanced Manufacturing of Medical Devices
- [DE160100260]
- Australian Research Council [DE160100260] Funding Source: Australian Research Council
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The variation in the metallurgical characteristics, in terms of microstructure and microhardness, of direct laser deposited Ti6A14V premixed with trace boron (0.04 wt%) was investigated. A significant improvement in the clad hardness from 390 to 450 HV in Ti6Al4V deposit to 510-600 HV in Ti6Al4V0.04B clad was observed. This was attributed to not only the fine alpha-Ti laths but also the presence of very hard TiB precipitates formed in the latter sample when compared to the martensitic alpha'-Ti formed in the former specimen. The high cooling rates experienced during deposition produced an extremely fine and even distribution of TiB.
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