Journal
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
Volume 109, Issue 1-2, Pages 579-588Publisher
SPRINGER LONDON LTD
DOI: 10.1007/s00170-020-05509-1
Keywords
Selective laser melting (SLM); Metal matrix composites (MMC); Ti-6Al-4V; Boron carbide ceramics B4C
Funding
- Russian Scientific Foundation [18-79-00052]
- Russian Science Foundation [18-79-00052] Funding Source: Russian Science Foundation
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Increasing performance requirements of advanced products demands new, versatile fabrication techniques. Additive technology represents one of the most prospective fields of future production. B4C-based composites were fabricated on titanium substrate by selective laser melting (SLM) using titanium (Ti-6Al-4V) and boron carbide (B4C) powder mixture at different weight ratio (Ti:B4C = 1:0, 9:1, 8:2, and 7:3). It was shown that the use of a powder mixture B4C + Ti-6Al-4V with ceramic concentration of more than 10% of weight led to formation of cracks. The microstructure of composites was studied by optical and electron microscopy. It was shown that a heterogeneous structure was formed with regular allocation of zones inside each layer. It was established that new chemical compounds (TiB, TiB2, TiC) absent in the initial powder mixture were formed in the new structure. A significant change in microhardness is shown (for sample without ceramics-372 HV0.3, for sample 10% B4C + 90% Ti-6Al-4V-from 548 to 4214 HV0.3). It was shown that the wear loss of B4C-free sample is approximately 4.2 times higher than that of the sample with 10 wt% B4C.
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