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Question 1. Why are nanocrystalline materials stronger? Explain answer based on dislocation activity.
Question 2. What are the five important factors that affect the recrystallization process in metals?
Question 3. Consider casting a cube and a sphere on the same volume from same metal. Which one would solidify faster? Why?
Question 4. Why is it difficult to improve both strength and ductility simultaneously? 5 points
Bonus questions:
Question 1. Why are cast metal sheet ingots hot rolled first instead of being cold rolled?
Question 2. Why does slip in metals usually take place on closed packed planes and in closed packed directions?
Question 1.(a) Explain the three stages of annealing treatment in 2-3 sentences each. (b) Explain any five properties that we can measure using a stress-strain curve under uniaxial tensile loading.
Question 2. What are the 4 strengthening mechanisms of metals? Explain each mechanism in 4-5 sentences. 10
Analyze a drier that reduces the moisture content of bentonite from 11% (bone dry basis) to 4% bdb. Assume the plant processes 100 tons/day is a gas fired rotary kiln (8 ft ID x 120 ft long).
Design the folded-cascode circuit of Fig. to provide voltage gain of 80 dB and a unity-gain frequency of 20 MHz when CL = 10 pF. Design for IB = I, and operate all devices at the same / VOV / Utilize transistors with 1-μm channel length for which..
For the truss shown, find the forces in each member, using method of joint
Design a "FIFO" memory system with following characteristics. Compare the performance of your designs with the FIFO that can be generated using the FIFO WIZARD.
Discuss the points you would consider when selecting an underground production method or methods for a particular ore body.
Describe how negative feedback works, and explain some of its advantages.
Calculate the value of RB necessary to operate the NPN transistor in saturation, stating all assumptions made.
EEN 1200- Follow steps of part A-1 to hook up the 7408 of Quad 2-Input AND gate, then connect input A to SW7 and input B to SW6 then generate a truth table below by measuring output Z using voltmeter. Draw both cases on the graph below.
POWDER PROCESSING AND CERAMIC SHAPING - Discuss the advantages and limitations of chemical reduction for metal powder production
A set of uniform laws, consistently adopted and applied by most states that governs commercial transactions including commercial paper
The total ramp density for this freeway segment is 2.33 ramps per mile. If the peak hour factor is 0.90 and all of the drivers are regular users, what is the level of service of compound grade freeway segment?
Assuming that the impact is perfectly plastic, determine the angular velocity of the crate and the velocity of its mass center immediately after the cable becomestaut.
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