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1. What is a stainless steel? Why are stainless steels stainless?
2. We wish to produce a martensitic stainless steel containing 17% Cr. Recommend a carbon content and austenitizing temperature that would permit us to obtain 100% martensite during the quench. What microstructure would be produced if the martensite were then tempered until the equilibrium phases formed?
an axial flow compressor stage has blade rootmean and tip velocities of 150200 and 250 ms. the stage is to be designed
Then, compute the energy loss over a length of 1.80 m. Assume that the surface roughness is similar to that of commercial steel pipe.
A hot-air balloon of mass m is used to lift a load, Mg, by means of 12 equally spaced elastic ropes, each of stiffness k (see Fig. 5.60). Find the natural frequencies of vibration of the balloon in vertical direction. State the assumptions made in..
In the an ideal turbo jet, the engine is designed such that the turbine work is divided equally between the compressor and the propeller. The gas from the turbine discharges to a nozzle for additional thrust.
The vertical clearance available for ductwork is 12 in. Identify a cost-effective rectangular duct section that meets these clearance and equivalent diameter requirements. Assume the duct is not lined.
For a control volume enclosing the nozzle only, determine the heat transfer, in kJ, and the change in specific entropy, in kJ/K, each per kg of carbon monoxide flowing through the nozzle. What additional information would be required to evaluate ..
Air enters a turbine operating at a steady state at 8 bar, 1400K and expands to 0.8 bar. This turbine is well insulated and kinetic and potential effects can be neglected. Assuming ideal gas behavior for the air, what is the maximum theoretical work ..
a long trough is supported by a continous hinge along its lower edge and by a series of horizontal cables attached to
1.25 kg of a gas within a piston-cylinder assembly undergoes an expansion from a volume of v10.1m3 to a volume of
air enters a 0.8 cm i.d tube at 20 degree c with an average velocity of 0.8 ms. the tube wall is kept at 40 degree c.
the vertical load on the hook is 1000 lb. draw the appropriate free-body diagrams and determine the maximum average
a 4ft concrete post is reinforced with four steel bars each with a 34in diameter. knowing the es29x106 psi and ec
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