Abstract
A number of blocks of the high-strength alpha–beta titanium alloy Ti–6Al–2Sn–4Zr–6Mo (Ti-6246) were manufactured using direct laser fabrication. Two processing methods were investigated; one of which used a high-power (18 kW) CO2 laser, the other using a (4 kW) Nd-YAG laser. Following manufacture, the blocks were sectioned and mechanically tested to compare the properties of material produced using the two processes. The mechanical assessment involved a combination of room temperature tensile testing and fracture toughness measurements.
The results revealed that the Ti-6246 produced using both processing routes exhibited a low ductility (<3% elongation). The fracture toughness figures were, however, acceptable. The low ductility was thought to be linked to the presence of a large transformed beta grain size together with the presence of grain boundary alpha.
Original language | English |
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Pages (from-to) | 268-276 |
Journal | Journal of Materials Processing Technology |
Volume | 170 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - 14 Dec 2005 |
Keywords
- manufacturing technologies
- titanium
- laser deposition