I am working on crack propagation for calculation fracture toughness using indentation technique on Titanium Alloy. If anyone has a paper regarding that, kindly provide to me. It can be any alloy of titanium. I need experimental results also. Thanks
Steve is most definitely right. You will be totally out of luck with this. The indentation toughness test was developed for brittle materials, specifically ceramics, and is at best approximate. In theory, it is based on the residual tensile field (formed when the indenter is removed) in creating cracks which emanate from the corners of the indent. Akin to most metals, the inherent ductility of Ti-6Al-4V will relax those fields and no indentation cracks will form.
Dear Abdul these are some articles. They may give you some idea at least what is going on in this field.
Best Regards.
I think you'll be out of luck with this: Ti alloys are too tough for indentation cracks to be produced at all.
Dear Abdul, Steve has made very important comment on the indentation test concerning Ti alloys. Theoretical value may be calculated from the following definition of the fracture toughness KC = SQR ( E GC ) where GC is called the total work of fracture and it is given by GC = 2 Gama, here Gama is the surface free energy, which may be estimated from Gama = a E/ 20 , a is the lattice parameter. E is the Young's modulus. Theoretical value is found about 6.8 MPa. On the other hand the reported experimental value is about two orders of magnitude larger than this figure.1 This is due to the fact that there is a large plastic zone created at the crack tip, which enhances the fracture energy denoted as GC by 4 orders of magnitude(See: ibid. p.285 Table 8-4).
1) Principles of Engineering Material by C. R. Barrett, W. D. Nix and A. S, Tetelman,
Steve is most definitely right. You will be totally out of luck with this. The indentation toughness test was developed for brittle materials, specifically ceramics, and is at best approximate. In theory, it is based on the residual tensile field (formed when the indenter is removed) in creating cracks which emanate from the corners of the indent. Akin to most metals, the inherent ductility of Ti-6Al-4V will relax those fields and no indentation cracks will form.
- Badges
- Science topic
- Similar topics
- Engineering
- Materials Engineering
- Annealing
- Metallurgy