Thank you for your help and for providing the necessary references.

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The discussion clarifies the distinctions between precipitates, dispersoids, and intermetallics in materials science. Intermetallics are defined as stoichiometric constituents in alloys that differ structurally from the base alloy and are often considered a type of precipitate. Precipitates are components that form during the melting phase of materials. Dispersoids are finely divided particles of one substance dispersed within another, playing a crucial role in enhancing recrystallization resistance by pinning growing subgrains. Key elements that form dispersoids include manganese, zirconium, scandium, and hafnium. The conversation also references several articles that provide further insights into the formation and effects of dispersoids in magnesium alloys and their tribological properties.
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Hi,

Could anyone please give me a definite difference between precipitates, dispersoids and intermetallics? I would appreciate any references to descriptions and definitions.

Thank you so much
 
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Intermetallics are stoichiometric constituents in alloys the usually differ structurally from the alloy, and they tend to be precipitates.

Precipitates are simply those components that 'precipitate' during the melting phase.

Generally dispersoids are finely divided particles of one substance dispersed in another, but see the following -

Dispersoids are components that "pin the growing subgrains (recrystallisation nuclei), and consequently leads to an improved recrystallisation resistance. Examples of dispersoid forming elements are manganese, zirconium, scandium and hafnium."
http://www.sintef.no/static/mt/norlight/ProjectPortfolio/HeatTreatmentFundamentals/dispersoids.htm

Materials and Processing Designs for Magnesium Alloys - Grain Refining by Repeated Plastic Working and Solid-State Synthesis of Mg2Si (Review)
http://www.azom.com/details.asp?ArticleID=3011

Tribological Properties of Magnesium Matrix Composite Alloys Dispersed with Mg2Si Particles
http://www.azom.com/details.asp?ArticleID=3059
 
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I need to anneal 5052 aluminum for a home project. Google has given me mixed results on how to do this. Short version is that I'm doing some heavy forming on a piece of 5052-H32 and I'm running into issues with it work hardening. I've tried the Sharpie trick with a propane torch. But I'm not sure this is doing anything. I'm also seeing conflicting opinions whether to quench or air cool. So I'm looking for some expert opinions. (Oven heating is not an option due to size.) Thanks. edit: The...

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