Poster Tensile properties of TiBw/Ti6Al4V composites fabricated by powder metallurgy
A series of TiBw-Ti6Al4V composites with very low volume fraction (0.25%-2.0%) of reinforcement were successfullyfabricatedby powder metallurgy process. In the fabrication process, the TiB2 powders asboron source were adheredonto the surfaceof Ti6Al4V powders in the low energy milling process, and then, the TiB whisker reinforcement were in situ synthesized by thereaction between TiB2 and Ti. It is surprised to find that not only the tensile strength but also the ductility of the as-sintered0.25vol.% and 0.5vol.% TiBw-Ti6Al4V composites are higher than those of the as-sintered Ti6Al4V alloy. It is worth pointingout that the yield strength (787MPa), ultimatetensile strength (885MPa) and the tensile elongation (14.3%) of the Ti6Al4Valloy are certainly reasonable. However, the 0.25vol.% TiBw-Ti6Al4V composites exhibit 975MPa of ultimate tensile strengthand 22.8% of tensile elongation. In addition, it is reasonable that the tensile strength increases while the elongation decreaseswith increasing volume fractions of TiB whisker. The 2.0vol.% TiBw-Ti6Al4V composites exhibit 1070MPa of ultimate tensilestrength and 9.1% of tensile elongation. The superior tensile properties of the as-sintered TiB-Ti6Al4V compositesare related tonot only grain refinement but also novel deformation and fracture mechanisms.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).