hi dear homayoun, I work ECAP process in my MSC thesis. I remember that has been application in Ti6Al4V alloy for bio application.

Soroush Bakhshi

Hi dear Bakhshi,

Thank you so much, That's right but I want to know about relationships between the nanostructure of SPD processes and Bio application of being nanostructure.

I know that SPD processes such as ECAP already used to produce dental implants but I don't know why?

Best regards

Hi,

The grain size may influence the biocompatibility, so the alloys co-exist better with human tissue. Also, strength is always important for the implants. SPD may give rise to better properties on those aspects.

Yi Wang

Hi,

Ok, The grain size and strength of SPD products are very important. Can you give me more information about biocompatibility? As I know Ti alloys were used to produce dental implants, Do you know about other materials which are using as implant, and their main production methods?

Here is a paper from my Ph.D supervisor's team: Article Nanolamellar Tantalum Interfaces in the Osteoblast Adhesion

Hi

Severe Plastic Deformation processes improves the strength of the material by grain refinement from low angle grain boundary to high angle grain boundary. It is because of this reason they have extensive industrial applications. Materials such as Ti alloys have better formability after subjecting to SPD process and post annealing. The other important property is the corrosion behaviour of SPD processed materials (most common Ti alloy- Ti6Al4V for biomedical application). In the UFG materials there will be excess grain boundary energy which makes an effort to form a passive film over the surface which attempts to reduce the corrosion rate. But the study of corrosion behaviour of UFG materials is a very vast domain and it varies depending on the alloy (since corrosion is not only dependent on the grain boundaries).

Best regards