I want to evaluate the mechanical properties of the interface between two bonded sheet metals. the interface thickness is around 2-5 um. Is there an experimental method or a characterization procedure that can evaluate the mechanical properties of the developed interface?
I think you can try with AFM and nanoindentation. They both can work on this scale. However, for nanoindentation, to get indent on this thickness, you may have to have a good optical system accompanying the nanoindenter.
What kind of mechanical properties are you trying to get? Nanoindentation can provide you Young's modulus and hardness. And to some extent, you can predict the yield strength and strain hardening exponent.
If you want to know the interfacial strength of the interface, then something like the lap-shear test or peel test may help you.
Good luck!!
I think you can try with AFM and nanoindentation. They both can work on this scale. However, for nanoindentation, to get indent on this thickness, you may have to have a good optical system accompanying the nanoindenter.
What kind of mechanical properties are you trying to get? Nanoindentation can provide you Young's modulus and hardness. And to some extent, you can predict the yield strength and strain hardening exponent.
If you want to know the interfacial strength of the interface, then something like the lap-shear test or peel test may help you.
Good luck!!
Dear Mina,
As Soud mentioned Nanoindentation definitely can do the job. Modern systems like Hysitron nanoindenters are capable of scanning the surface with the same tip you are indenting so optical resolution is no matter any more. However, the most important challenge is a decent surface preparation. If your interface has a very different mechanical properties the mechanical polishing will induce height differences. You may think about preparing a tilted surface through your interface to increase its width.
Cheers,
Afrooz
Thank you for your answers. I already have used nanoindentation. So, I believe I am on the right track.
Nanoindentation and nanoscratch give information about the interface properties. But we need use different parameters to characterize the interface. Hardness, youngs modulus, maximum penetration depth, energy, load-displacement plots etc.
In my work, I have discussed, how to probe the interface properties.
For more details. go through below links.
http://onlinelibrary.wiley.com/doi/10.1002/app.43532/full
http://www.sciencedirect.com/science/article/pii/S0032386116301227
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