Differentiate Primary Al & Eutectic Al in Al-17Si Alloys

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SUMMARY

The discussion focuses on differentiating between primary aluminum and eutectic aluminum in Al-17Si alloys. The user observed aluminum dendrites in their castings and seeks methods to identify their composition. A key method mentioned is using an electron microscope equipped with Energy Dispersive X-ray Spectroscopy (EDX) to analyze the silicon content in the dendrites. The suggestion to conduct EDX analysis at IISc highlights a practical approach for accurate differentiation.

PREREQUISITES
  • Understanding of Al-17Si alloy composition
  • Familiarity with microstructural analysis techniques
  • Knowledge of electron microscopy and EDX
  • Basic principles of dendritic solidification in alloys
NEXT STEPS
  • Research EDX analysis techniques for alloy composition
  • Learn about the microstructural characteristics of Al-17Si alloys
  • Explore the role of silicon in aluminum alloy solidification
  • Investigate advanced electron microscopy methods for material analysis
USEFUL FOR

Materials scientists, metallurgists, and engineers working with aluminum alloys, particularly those involved in casting and microstructural analysis.

pukb
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Hello,

I am working on Al-17Si alloys. I have done some castings and in micro-structure I saw formation of Aluminium dendrites. I am unable to find out whether it is primary Al or eutectic Al. One way to find that is to find out Percentage of Si in the dendrites. But how do I do that?
Is there any other way to differentiate? Thanks in advance for any suggestions.
 
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Put it into the electron microscope that can do EDX. Look at the Xrays.
 
Thank you it was really useful
looking to do edx at iisc
 

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