ME 3752 : Old Final Exams (Test #2) From 2002 - 2011 (Answered)
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2) quench cracks produced in a quench-required steel are prevented by: nickel-base superalloys acquire high strength and creep resistance at high, an engineering ceramic used in mechanical system is: a) silica b) silicon nitride c) Ii) give the proper answer to the following: (10 pts. : hydrogen embrittlement the process by which various metals, like high strength steel, become brittle and fracture following exposure to hydrogen. It"s usually the result of unintentional introduction of hydrogen in to susceptible metals during forming or finishing operations. load is higher lubricant coating or heat treating______________________ specific steel) steel sae1050. Iii) identify the optimum material for the following applications and explain why you would choose those. Ni-base superalloy since it has good thermal properties and deals well with corrosion. Fatigue strength is lower than some super alloys: compressor blades in a gas turbine engine closer to the combustion zone. Ti-4al-4mo-2sn since its lightweight, strong, and resists corrosion.
