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1 what are the origins of chemical segregation in cast products2 how can microsegregation be removed3 what is
1 what is spray atomization2 homogenization of a slowly cooled cu-ni alloy having a secondary dendrite arm spacing sdas
1 what are the requirements of a matrix and precipitate for dispersion strengthening to be effective2 what is an
1 what are some of the major problems in the utilization of intermetallics for high-temperature applications2 define
a hypothetical phase diagram is shown in figure 11-25a are there any intermetallic compounds present if so identify
the cu-zn phase diagram is shown in figure 11-26a are any intermetallic compounds present if so identify them and
the al-li phase diagram is shown in figure 11-27a are any intermetallic compounds present if so identify them and
calculate the total beta and the eutectic microconstituent at room temperature for the following lead-tin alloys 10
consider an al-25 si alloy see figure 11-19 determinea if the alloy is hypoeutectic or hypereutecticb the composition
1 a pb-sn alloy contains 23 primary a and 77 eutectic microconstituent determine the composition of the alloy2 an al-si
1 what properties of the precipitate phase are needed for precipitation hardening why2 what is the principle of
1 in regards to eutectic alloys what does the term lsquolsquomodification mean how does it help properties of the
1 explain why pb-sn alloys are used for soldering2 refractories used in steel making include silica brick that contain
1 what is hot shortness how does it affect the temperature at which eutectic alloys can be used2 design a processing
1 compare and contrast eutectic and eutectoid reactions2 define the following terms ferrite austenite pearlite and
1 why are most precipitation-hardened alloys suitable only for relatively low-temperature applications2 explain the
1 in the plane flown by the wright brothers how was the alloy precipitation strengthened2 can all alloy compositions be
1 why is it that certain aluminum not nickel-based alloys strengthened using age hardening can lose their strength on
1 c2 why is precipitation hardening an attractive mechanism of strengthening for aircraft
write the eutectic reaction that occurs including the compositions of the three phases in equilibrium and calculate the
observation of a microstructure shows that there is 28 eutectic and 72 primary beta in an al-li alloy figure 11-27a
a steel microstructure contains 75 martensite and 25 ferrite the composition of the martensite is 06 c using figure
1 what is the dicurrenerence between solid-state phase transformations such as the eutectoid reaction and the
1 describe the hardness and microstructure in an eutectoid steel that has been heated to 800degc for 1 h quenched to
1 why is it that a eutectoid steel exhibits different yield strengths and elongations depending upon if it was cooled