DENT 1.2 Flashcards
When stress is even around most of the plane, but raises suddenly near a groove or imperfectoion, what is this called
Stress Raiser
what allows water to penetrate between polymer chains
Weak secondary bonds
_______ _______ forms more nucei per unit volume and _______ the grain size
Rapid Cooling, Deacreases
Ductility and Maleability
the ability of atomic centers to slide against each other into new positions within the same crystal latice
Finer grain size can raise the _____ ______, increase the ________, and raise the ______ _______.
Yield strength, ductility, Ultimate strength
changes in Yield strength, ductility, and ultimate strength, with grain size, are related to what
Plastic defromation and fracture
are fractures more likely or occur in large grain or small grain metals
Large grain, grains can not be slipped into adjacent grains
what is the mechanism of plastic deformation called
Dislocation motion
what does cold working cause to happen
Plastic deformation, many dislocations that can not slip easily through each other.
what occurs when 2 metals are soluble as luquids but nearly insoluble as solids
eutectic alloys
Au and Cu are ________in each other at any_________
Soluble, combination
At a certain % of Au they form an ______ ______ - Au and Cu occupy specific position in the F-C cubic
ordered solution
Ordered solution impart higher ________ and ______ to alloys
hardness and strength
The Pure eutectic has a _______ ____ that is________ then either of the pure components
Melting point, Lower
what Is the lower limit of Noble metals by weight
25% of noble metal content
