What two general competing processes control the creep rate of a metal? What is the relative strength (or rate) of the two processes during Stage I and Stage II creep behavior?

What is the effect of strain hardening on the material?

How does the resilience of this material compare to its toughness?

Is the Paris power law (Eq. 10-3) relevant for all conditions of fatigue crack growth?

Why are pairs of materials more likely to experience thermal stress problems when they represent two different material classes?

How are the materials classified as ductile or brittle?

Is the maximum normal stress theory useful to predict the accurate failure of brittle material?

In order to find out the effects of the grain sizes on the mechanical strength of a metal, three different grain sizes of 10 µm, 500 nm and 10 nm were produced. What will be the yield stresses of these same metals at different average grain sizes? The yield strength for a grain or reference point is 78 MPa, while the material proportional constant is 29.2 MPa-mm1/2.

(b) (i) Describe the stages of cracking in brittle materials with reference to applied stress. staronoo to dionile lliw eresnigna adalé no Honove

When does fatigue occur in metals?