I had a query regarding identifying phases and other components formed within the joined interface. I have read some papers from the SEM analysis, but the procedure for how they will finally analyze the results is not mentioned. Please don't be too harsh on me.
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The classic method is to cut a cross-section of the joint, polish it to optical flatness, and apply a grain boundary etch- then photograph the developed microstructure in a metallographic microscope or wafer inspection microscope at 50x to 100x power.
Different grain boundary etches exist for different alloy systems (iron, copper, aluminum, magnesium, titanium, etc.)
A handbook of materials science specializing in metallography will furnish you all the details.
niels nielsen
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