Fracture mechanics relates the following parameters except s

Fracture mechanics relates the following parameters except: sample size crack length resistance to cracking applied stress The following metals are considered a refractory metal EXCEPT: Al Nb W Ta How can you improve fatigue life of a steel EXCEPT? by removing stress concentrators by imposing a tensile surface stress by carburizing the surface by applying the shot peening on the surface What is K_IC? fracture toughness that depends on specimen size critical value of stress intensity factor in mode II ductility parameter toughness under plane strain condition Which of the following phenomena is attributed to non-equilibrium nature of casting? coring eutectic reaction forming a primary phase precipitation To obtain molten steel, iron ore, coke, and limestone are all added to blast furnace. What is the role of limestone? reduction of iron ore melting purification heat generation In order to increase a strength of the metal, you can do the following EXCEPT? cold-work disperse fine precipitated particles make the metal into a single crystal make the alloy Shape memory alloys have the following characteristics EXCEPT: martensite transformation original shape can be restored when heated above A_s (austenite start temperature) deformation must occur below M_f (martensite finish temperature) deformation occurs by migration of twin boundaries

Solution

5.11 (a) All are related except sample size.

Fracture mechanics is the field of mechanics concerned with the study of the propagation of cracks in materials.

5.12 (a) Refractory metals: Niobium and Molybdenum, Tantalum, Tungsten, and Rhenium

5.13 (b) rest other will increase fatigue life.

(b) the option is just opposite to shot peening. Short peening creates compressive stress on the surface.

5.14 (a)

The K_IC tests used to determine the fracture toughness of metallic materials.

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