Compound Analysis vs. Elemental Analysis

[mpeck1982]

I am trying to determine fatigue failure for superheater tube sample. What are the big differences between Compound Analysis and Elemental Analysis? What are the differences between them? Which would be a better tool to find out if fatigue indicators are present?

 

[dhengr]

Mpeck1982:
What is your definition and understanding of the “differences between Compound Analysis and Elemental Analysis?” I’m not sure that I understand what those terms mean. As often as not, pitting, corrosion, erosion, geometry, mechanical properties and metallurgy of the materials, fabricating methods and/or defects cause fatigue failures, as the exact stresses and cycling. And, all of these things have to be taken into account, based on long experience with them and the product you are dealing with.

 

[rb1957]

i was waiting in case someone replied with knowledge of those terms. i'm sure they refer to something we're familiar with (like component tests or detail "element" tests) but till then i'm scatching my head.

 

[swall]

If you are talking about chemical analysis, elemental is taken to mean one of the elements (like iron) from the periodic table. Compound would mean a chemical compound, such as iron oxide.

 

[mpeck1982]

Compound Analysis via X Ray Powder Diffraction vs. Elemental analysis via Microscopy/Spectrometry. Would determining fracture failure be better suited for Compound Analysis via X Ray Powder Diffraction? Any suggestions? This is a new realm for me.

 

[swall]

I would recommend that you find a qualified metallurgical engineer to perform the analysis for you. I would start by contacting metallurgical labs in your area.

 

[GregLocock]

neither will be much help, the chemistry is not affected by the fatigue process, directly.

Cheers

Greg Locock


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