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a 15-cm-diameter metal bar with a 3-cm gage length l0 is subjected to a tensile test the following measurements are
we want a cu-30 zn brass plate originally 12-in thick to have a yield strength greater than 50000 psi and a elongation
a 3105 aluminum plate previously cold worked 20 is 2-in thick it is then cold worked further to 13 in calculate the
1 what is a heat-affected zone why do some welding processes result in a joint where the material in the heat-affected
1 the amount of plastic deformation that can be performed during hot working is almost unlimited justify this
we plan to join two sheets of cold-worked copper by soldering soldering involves heating the metal to a high enough
we wish to produce a 1-mm-diameter copper wire having a minimum yield strength of 60000 psi and a minimum elongation
a 2-in cube solidifies in 46 min calculatea the mold constant in chvorinovs rule andb the solidification time for a 05
1 sketch a cooling curve for a pure metal and label different regions carefully2 a cooling curve is shown in figure
figure 9-24 shows a cylindrical riser attached to a casting compare the solidification times for each casting section
a 2 in times 8 in times 10 in iron casting is produced and after cooling to room temperature is found to weigh 439 lb
liquid magnesium is poured into a 2 cm times 2 cm times 24 cm mold and as a result of directional solidification all of
design an efficient risering system for the casting shown in figure 9-26 be sure to include a sketch of the system
1 write down the gibbs phase rule assuming temperature and pressure are allowed to change explain clearly the meaning
1 define the terms brazing and soldering2 what is the difference between fusion welding brazing and soldering3 what is
a liquid cast iron has a density of 765 gcm3 immediately after solidification the density of the solid cast iron is
1 what is a riser why should it be designed so as to freeze after the casting2 calculate the volume diameter and height
1 calculate the volume diameter and height of the cylindrical riser required to prevent shrinkage in a 4 in times 10 in
a cooling curve is shown in figure 9-22 determinea the pouring temperatureb the solidification temperaturec the
1 how can solid solutions form in ceramic systems2 do we need 100 solid solubility to form a solid solution of one
1 how many grams of nickel must be added to 500 grams of copper to produce an alloy that has a liquidus temperature of
suppose 1 at of the following elements is added to copper forming a separate alloy with each element without exceeding
a fiber-reinforced composite material is produced in which tungsten fibers are embedded in a nb matrix the composite is
1 what is brass explain which element strengthens the matrix for this alloy2 what is the composition of monel alloy3
1 briefly state the hume-rothery rules and explain the rationale2 based on hume-rotherys conditions which of the