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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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physical basis for melting-points of alloys?
In article , Tim Williams says...
And so on and so forth; the eutectic layers interact through contact, diffusion, and mutual solubility on melting to once again form an homogenous liquid. This is the realm of solid-solution chemistry. It's really very, very complicated. There are folks who make entire careers out of understanding things exactly like this. The details of how this stuff works is of considerable technological interest. There are books just full of nothing but phase diagrams for different alloy compositions. The original question I think was looking for a very basic intuitive answer. I didn't reply because I thought he did not want to hear about phase diagrams, etc. Also because it was a 'why' question and I'm not very good at those - better at "how" questions. Jim -- ================================================== please reply to: JRR(zero) at pkmfgvm4 (dot) vnet (dot) ibm (dot) com ================================================== |
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"jim rozen" wrote in message
... The original question I think was looking for a very basic intuitive answer. I didn't reply because I thought he did not want to hear about phase diagrams, etc. Also because it was a 'why' question and I'm not very good at those - better at "how" questions. Yeah, amazing how such simple questions about things some of us encounter every day have such complicated and deep answers. Just the kind of thing Richard Feynman loved, I'm sure. Tim P.S. Thanks for the kudos Ed and BS... it's amazing what you can find on the internet! -- "California is the breakfast state: fruits, nuts and flakes." Website: http://webpages.charter.net/dawill/tmoranwms |
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Uncle Al wrote:
Hey stooopid, shove it back up yer arse. Whoa, where did that come from? From the sci.chem,.physics, .etc groups, I guess. That's where "Uncle Al" posts most often and where this thread was cross posted. Once again we're reminded of how civil RCM is compared to the rest of the usenet jungle. Bob |
#4
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In article , Tim Williams says...
but what is an eutectic? Eutectics don't have to have specific phases at the point. "Eutectic point" is generally defined as "the lowest melting point for any alloy." Jim -- ================================================== please reply to: JRR(zero) at pkmfgvm4 (dot) vnet (dot) ibm (dot) com ================================================== |
#5
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"jim rozen" wrote in message ... In article , Tim Williams says... but what is an eutectic? Eutectics don't have to have specific phases at the point. "Eutectic point" is generally defined as "the lowest melting point for any alloy." Jim A eutectic alloy is an alloy of a composition that has the lowest melting point of related alloys. This composition is the eutectic composition. The temperature at which it solidifies is the eutectic temperature. The combination of composition and temperature is the eutectic point. |
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