Ch. 6. Mechanical Properties of Metals
Differences between tensile, compressive and shear stress.
Hooke's law and the limits of applicability (equation).
Poisson's ratio for tension and compression.
How to obtain from a stress-strain diagram:
a) the Young modulus (elastic modulus)
Changes that occur to an object under stress until it fractures.
How is hardness measured and to what other property it is related.
What is elastic recovery
b) the yield strength
c) the tensile strength
Ch. 7. Dislocation and strengthening mechanisms
What are edge and screw dislocations.
What is the Burgess vector and the angle it makes with the dislocation line.
Plastic deformation from dislocation slips.
What are slip planes and slip directions.
Relation between slip and packing directions.
How to relate yield stress and critical resolved shear stress (equation).
How grains are deformed during plastic deformation.
Why slip is blocked by grain boundaries, defects, impurities
What is solid-solution strengthening.
What is strain hardening (cold work), how % cold work relates to permanent strain,
and and how it affects hardening.
What are recovery, recrystallization and grain growth and at what temperatures they
Ch. 8. Failure
What is fracture and how it starts
How crack propagate.
Why the strength of brittle materials is much lower than expected by theory.
How fracture toughness is defined.
How stress concentrates at a crack and how it depends on crack tip and length
How does the concentration factor depend on whether the crack is at the surface or in
How fatigue is defined and the conditions under which it occurs.
Determine from a plot the fatigue lifetime and fatigue stress.
How creep is defined and how it happens.
Determine creep rate and rupture lifetime from a creep plot.
Ch. 9. Phase diagrams
What is a phase diagram and what information does it give.
How to identify in a phase diagram which phases are present and which are the solidus,
liquidus and solvus lines.
What is an eutectic and an eutectoid.
What are the eutectic and eutectoid reactions.
How to use a tie line to determine composition of each phase in a binary phase diagram.
How to use the lever rule to determine the fraction of each phase in a mixed phase
What are hypoeutectoid and hypereutectoid Fe-C alloys.
What are the different phases in a Fe-C diagram.
What is perlite and how it is formed.
What is the proeutectoid phase in both hyper- and hypoeutectoid alloys.
Describe the microstructure of a binary alloy at different points in the phase diagram.