With tiny precipitate particles

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With tiny precipitate particles
Why don't dislocs move thru precipitates? a.
complex structure - poorly defined slip
planes and/or b. slip planes wrongly oriented
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Solute atoms different size than solvent atoms
Crystal structure distorted slip planes less
well-defined Disloc movement restricted
Cu solid solutions
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Work hardening Solution hardening Precipitation
hardening Grain size reduction
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Oh, yeah.one more thing about dislocs
Ease of disloc motion depends on slip plane
orientation wrt applied stress direction
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Slip occurs only as a result of shear only
along slip plane in a slip direction
The greater the no. of slip systems, the greater
the probability some slip plane slip direction
correctly oriented
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Slip system slip plane slip direction
ccp - 12 slip systems hcp - 3 slip
systems
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Composition 52.5Ni 19Cr 3Mo 19Fe 0.4Al
5Nb-1Ti 0.04C
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Possibilities for strengthening 718
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