What are the possible modes of crack propagation? What are the differences between them? Which is most effective mode?
How are stress amplitude, mean stress, stress range, and stress ratio of cyclic stresses calculated?
What is Paris Equation?
17.Do you know how to use the fracture toughness equation for failure analysis and material selection in design? What’s yinthe equation? What controls the value of y?
What’s creep of material? What are the stages? What is creep rate?
What major factors have effects onthe creep rate?
What’s Larsen-Miller parameter? How can it be used to analyze creep failure?
What is Gibbs phase rule? Do you know how to use it?
You should know how to read and use phase diagrams.
Given alloycomposition and temperature, you should know how to determine (
a) phases present in the material,
(b) composition of each phase, and
(c) amount or weight fraction of each phase.
Can you identify invariant points and associated reactions on cooling (or heating)?
Can you write the reaction of eutectic and eutectoid reactions?
Why do eutectic and eutectoid transformations produce layered microstructure?
.Do you know important phases such as austenite, ferrite, and cementite in steel?
How is pearlite made?
What is the carbon concentration in the cementite (iron carbide)?
How much do you about pearlite, bainite, and martensite? How are they made?
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