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Flashcards in DENT 1.2 Deck (19):
1

When stress is even around most of the plane, but raises suddenly near a groove or imperfectoion, what is this called

Stress Raiser

2

what allows water to penetrate between polymer chains

Weak secondary bonds

3

_______ _______ forms more nucei per unit volume and _______ the grain size

Rapid Cooling, Deacreases

4

Ductility and Maleability

the ability of atomic centers to slide against each other into new positions within the same crystal latice

5

Finer grain size can raise the _____ ______, increase the ________, and raise the ______ _______.

Yield strength, ductility, Ultimate strength

6

changes in Yield strength, ductility, and ultimate strength, with grain size, are related to what

Plastic defromation and fracture

7

are fractures more likely or occur in large grain or small grain metals

Large grain, grains can not be slipped into adjacent grains

8

what is the mechanism of plastic deformation called

Dislocation motion

9

what does cold working cause to happen

Plastic deformation, many dislocations that can not slip easily through each other.

10

what occurs when 2 metals are soluble as luquids but nearly insoluble as solids

eutectic alloys

11

Au and Cu are ________in each other at any_________

Soluble, combination

12

At a certain % of Au they form an ______ ______ - Au and Cu occupy specific position in the F-C cubic

ordered solution

13

Ordered solution impart higher ________ and ______ to alloys

hardness and strength

14

The Pure eutectic has a _______ ____ that is________ then either of the pure components

Melting point, Lower

15

what Is the lower limit of Noble metals by weight

25% of noble metal content

16

what occurs thw 10% Cu is added to Au

-Tensil strength Increases significantly
- BHN (hardness) Increases significantly

17

what constitutes a high noble metal

at least 60% noble metal, and 40% Gold

18

what constitutes a noble metal

at least 25% noble metal

19

what constitutes a base metal

less then 25% noble metal