Abstract
• Epoxy can be well bonded to electron beam powder bed fusion (EBPBF) Ti6Al4V. • Effect of micro-interlocking due to partially melted powder is shown. • Anodised EBPBF Ti6Al4V further provides a strong interlocking effect. • Meshed surface provides interlocking effect, but meshed structure is week. Many applications of Ti6Al4V parts manufactured by electron powder bed fusion (EBPBF) require the parts to adhesively bond to other parts. Thus, how the surface morphology affects bond strength has been studied using an adhesive epoxy. Samples include polished (P) surface, top/horizontal as-built (H) surface and side/vertical as-built surfaces which included nonmeshed (V), nonmeshed plus anodised (VA), and trabecular meshed (M) surfaces. Bond strength between epoxy and EBPBF Ti6Al4V increased in order: P, M, H, V, and then VA surfaces. Good strength in V samples was predominantly contributed by the mechanical effect through micro-interlocking in the partially melted powder. A further increase in bond strength has been obtained through anodising (VA samples), due to the adhesive having infused into the ultrafine and nano-pores. Finally, it has been found that a good interlocking effect but a strength reduction of porous Ti6Al4V have resulted in a strength level being relatively low in M samples.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call