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Effect of boron on the structure and mechanical properties of Ti–6Al and Ti–6Al–4V

✍ Scribed by O.O. Bilous; L.V. Artyukh; A.A. Bondar; T.Ya. Velikanova; M.P. Burka; M.P. Brodnikovskyi; O.S. Fomichov; N.I. Tsyganenko; S.O. Firstov

Publisher
Elsevier Science
Year
2005
Tongue
English
Weight
768 KB
Volume
402
Category
Article
ISSN
0921-5093

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✦ Synopsis

Boron alloying was found to have a beneficial effect on the plasticity of Ti-6Al and Ti-6Al-4V (wt.%) as-cast alloys for contents within the solubility limits (up to around 0.05 wt.%) and to enhance their strength and hardness HV in the range of the existence of metal-boride eutectic (up to 2.0 and 2.5 wt.% B studied, respectively). The boride reinforcement contributes much to the hardness and strength of the Ti-6Al and Ti-6Al-4V alloys, increasing them by 1.5-2 times at room temperature to 400 • C. Monovariant eutectics (Ti 88.8 Al 11.2 ) + TiB and (Ti 84.9 Al 11.4 V 3.7 ) + (Ti 96.9 V 3.1 )B were found to solidify at compositions Ti-6Al-1.8B and Ti-6Al-4V-2B (wt.%) and at temperatures of 1530 and 1515 • C, respectively.

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