2.Final notes - h 2. If the dispersed phase were continuous...

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Sheet1 Page 1 Eutectic reaction- A solidification transformation by which a liquid freezes to simultaneously form two solid phases -In eutectic reactions the two components dissolve each other without limits in the liquid phase -the components do not dissolve each other at all in solid state This kind of reaction is very important in dispersion strengthening, cast irons and many aluminum alloys Two phases: 1. Soft phase- (The matrix) present in larger amounts, softer and continuous 2. Hard phase- (dispersed phase, precipitate) discontinuous General considerations of the matrix and dispersed phase and how they affect overall properties 1. The matrix should be soft and the dispersed phase should be hard. The dispersed phase particles interfere with slip while t
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Unformatted text preview: h 2. If the dispersed phase were continuous cracks could propagate throughout the entire surface 3. Dispersed particles should be small and numerous 4. Dispersed particles should be round because it is less likely to initiate cracks or act as a notch 5. Higher concentrations of dispersed phase increase the strength of the alloy but decrease ductility For eutectic diagrams the ductility/conductivity decreases as the percentage approaches the > V& Tensile strength/yield strength/hardness increases as the percentage approaches the “ V& Sheet1 Page 2 this allows for more interference with the slip process since the area of the interphase interface is increased significantly...
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This note was uploaded on 09/06/2011 for the course EMA 3010 taught by Professor Unknown during the Fall '08 term at University of Florida.

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2.Final notes - h 2. If the dispersed phase were continuous...

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