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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
1 a steel is heated until 85 austenite with a carbon content of 105 forms estimate the temperature and the overall
1 a steel contains 55 alpha and 45 gamma at 750degc estimate the carbon content of the steel2 a steel contains 96 gamma
1 a steel contains 8 cementite and 92 ferrite at room temperature estimate the carbon content of the steel is the steel
for an fe-115 c alloy determinea the temperature at which austenite first begins to transform on coolingb the primary
1 what is the dicurrenerence between cast iron and steels2 what do a1 a3 and acm temperatures refer to are these
you use an arc-welding process to join an eutectoid steel cooling rates may be very high following the joining process
an age-hardened al-cu bracket is used to hold a heavy electrical-sensing device on the outside of a steel-making
1 describe the changes in properties that occur upon the tempering of an eutectoid steel2 you wish to attach aluminum
1 fine pearlite and a small amount of martensite are found in a quenched 1080 steel what microstructure would be
1 you would like to produce a gray iron casting that freezes with no primary austenite or graphite if the carbon