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A boiler tube made of ASME SA-213 Grade T2 contains 0.15% C and 0.6% Cr. The tube failed in operation with a fishmouth fracture typical of overheating. The tube had been operating normally for three years at a steam temperature of 420°C before failure occurred. A metallographic examination at various locations revealed the following microstructures: (a) At a distance of 5000 mm from the fracture: Ferritic/pearlitic micro- structure with lightly spheroidized pearlite (heat degraded)(b) At the thinned lip of the fishmouth: 100% martensite/bainite(c) At a location 200 mm away from the fracture: 50% martensite/bainite with 50% heavily heat-degraded ferrite/pearlite Explain how the microstructures above had formed. Assume that the eutectoid diagram has the following coordinates: (i) At C = 0%, A3 = 900°C(ii) Eutectoid point is at T = 750°C and C = 0.7%(iii) Maximum solubility of 0.02 wt% carbon in ferrite
1. For the PROM realization shown below, determine the corresponding Boolean expressions for outputs f1, f2 and f3.
Design a tube and shell heat exchanger for the fluids and duty given for you and complete Project Management tasks -
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Determine the number of steps required in the starter and the value of the resistors in each step
Is it a positive or negative correlation? How did you determine this to be the case?
Consider the sinusoidal voltage and current v(t) = 120 sin(120πt) V and i(t) = 20sin(120πt + 60o) A.
The following describes a mineral deposit. For the deposit the candidate is required to select a suitable mining method for the deposit based on the information given and to describe the mining system in detail. The candidate should include in their ..
A uniform sphere of radius r is placed at corner A and is given a slight clockwise motion. Assuming that the corner is sharp and becomes slightly embedded in the sphere, so that the coefficient of static friction at A is very large, determine
question 1a pool of newly qualified doctors are not satisfied with their existing revenue and decide to set up an
Questions based on Block Diagram, System Performance and Responses.
What is the nature of digital signals, binary, and other multilevel signal types
Remember that you studied several methods in class to break a complicated rational function of S into simpler rational functions of S. You can use any of these methods or a combination of them here. Also note that Matlab is good in solving a set..
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