KOMA Omtenta - ord

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• S/N-plot Stress amplitude and Number of cycles
• austenite > martensite rapid quench
• austenite > bainite moderate cooling
• austenite > pearlite + a proeutectoid phase slow cooling
• Ef, Vf fiber phase
• Em, Vm matrix phase
• Vp particulate phase
• sigma_f* fiber tensile strength
• sigma_m matrix at fiber failure
• austenite FCC
• Fe - Draw schematically and compare atom atoms, Ni, Cu, Al
• ZnS - Draw schematically and compare atom ions, BeO, ZnTe, SiC
• CaF2 - Draw schematically and compare atom ions, PuO2, ThO2, UO2
• zincblende ZnS
• Fluorite CaF2
• PPF atoms in plane * area atoms / area plane
• martensite > tempered martensite reheat
• covalent bond CdTe, rubber
• wan der waals xenon
• ions CaF2
• metallic bronze, tungsten
• interstitial atoms H, B, C, N
• congruent transformation H2O
• incongruent transformation change in composition
• Is brittle or ductile fracture (or both) associated with intergranular crack propagation? Why? brittle, along grain boundaries
• natural aging process occur at room temperature
• artificial aging occur at elevated temperature
• crystal structure FCC, BCC, HCP
• Polymer molecules large molecular chains with O and Cl
• Point defects vacancies and self-interstitials
• Diffusion mechanisms Vacancy and interstitial
• Strain hardening cold work
• Eutectoid reaction from one solid to two
• Glass-ceramics glasses to polycrystalline
• Hydrogen Bond secondary, bonding between H2O molecules
• Dislocation Generator shear force
• Homopolymer single repeat unit
• Transient diffusion initial stages of diffusion
• secondary creep creep rate
• Intermetallic Compounds metals, ionic and covalent
• Annealiing of a cold work material - Recovery residual stresses decrease strongly
• Annealiing of a cold work material - Recrystallization UTS and grain size decrease strongly
• Annealiing of a cold work material - Grain growth increase in grain size
• Equiaxed grains observed after recrystallization
• Pressure die casting method gives precision metal castings.
• White Cast Iron obtained when molten cast iron solidifies
• Ni-based Superalloys High temperature alloys
• Large Particle composites big hard particles
• Embodied Energy Etot, producing a raw material
• pearlite ferrite + cementite
• composite is loaded in the longitudinal direction epf=epm
• parabolic oxidation metal oxide, k*t = x^2
• How can the oxidation of a metal continue even after a dense oxide layer covers its surface completely? wagner´s theory, slower rate
• oxidation rate for copper at 900C relative to the oxidation rate at 600C. 900/600
• Electronegativity large difference lead to ionic
• Slip System slip plane + a slip direction
• Tacticity order in polymer chain
• Tacticity example atactic (random), isotactic (same side), syndiotactic (symmetric)
• Isomorphous System 100% mixing of solid and liquid
• Superplasticity ability to plastically deform
• Steady-state diffusion diffusion under a constant concentration
• Fatigue Limit largest stress amplitude
• Dendrites tree like structures
• Heterogeneous Nucleation occurs on existing solid surfaces, easier nucleation
• Malleable Iron carbon is present as graphite in rosette form
• Light Metallic alloys Mg, Ti, Al
• Intercrystalline Corrosion intergranular corrosion, grain boundaries are attacked first
• Particle composites Hard particles in a soft matrix
• quenching temperature for steel leaving austenite
• Explain the differences in mechanical properties of W-particles and W-fibers. P are less dense compared to F
• sketches Rock salt (NaCl), Cesium Chloride (CsCl), Zinc blende (ZnS), Perovskite (BaTiO3)
• Two molecular characteristics essential for elastomers amorphous and crosslinking
• linear density of atoms number of atoms / length of direction

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