Dear ResearchGate Community,
I am currently working on nanoindentation experiments using a Berkovich indenter on MG-WE43 alloy samples. My primary objective is to determine the hardness and elastic modulus of the material using the Oliver-Pharr method. However, I have encountered some issues in my analysis code, and I am seeking technical guidance to overcome these challenges.
Here is a brief overview of my experimental setup and the problems I am facing:
- Setup: Indenter Geometry: Berkovich, Material: Mg-WE43 alloy.
- Challenges: I have implemented the Oliver-Pharr method to calculate hardness and elastic modulus, but I am uncertain about the correctness of my code. I would appreciate guidance on the code implementation and any potential pitfalls specific to MG-WE43 alloy. I am unsure about the appropriate values for Poisson's ratio and elastic modulus of MG-WE43 alloy. Should I rely on literature values, or is there a way to experimentally determine these parameters? Are there any specific considerations or corrections needed when analyzing nanoindentation data?
If any of you have experience with nanoindentation on similar materials or with the Oliver-Pharr method, I would greatly appreciate your insights and recommendations. Additionally, if you could share any MATLAB or Python code snippets tailored to this specific analysis, it would be immensely helpful.
Thank you in advance for your assistance.
Poisson and elastic modulus can be calculated by the ultrasonic pulse-echo method. Article Measurement of Elastic Properties of Brittle Materials by Ul...
Hi Ganesh, I suggest that you take the poisson value from literature (0.27 its a reasonable value) to implement it in your code as it is quite difficult to measure it experimentally but I dont understand why do you need the elastic modulus if the goal of your nanoindentation experiments is to measure the elastic modulus itself... is it for comparison reasons?
Thank you for your Response Mr. Enrico Corniani , I did consider the Poisson value since it has been established with the calculation for the Oliver-Pharr method. The experiment has multiple level of coatings associated with it, i would like to analyse the modulus changes associated with it.
Thank you for your response Mr. Leonardo Fanton, I have some limitations with trying out other methods of indentation.
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