0
-273k
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
What is intercritical annealing?
Intercritical annealing is where the metal is heated to between its lower and upper critical temperature point to allow partial transformation of the matrix into austenite followed by slow cooling or holding below the lower critical temperature point.
What the definition of critical cooling rate in a context of austenite transformation?
The slowest rate of cooling from the hardening temperature which will produce the fully hardened martensitic condition.
What is critical thickness during heat treatment?
In iron materials ,during the critical thickness of it the ironoxide grows inside the material. This thickness where it happens is called critical thickness.
What is steady heat flow?
In most realistic situations heat flow can be said to occur from a region of higher temperature to one of lower temperature. As the region of higher temperature loses heat and the other region gains heat their temperatures become closer and the rate of heat flow diminishes. If, however, it can be contrived to maintain the source of heat at a constant temperature and the destination of the heat also at a constant temperature, then the heat will flow between the two at a constant rate, called steady heat flow.
What is the cooling system of gas turbine blade?
In order to enhance creep life of gas turbine blade, it is required to keep blade at lower temperature, hence internal cooling of blade is done.
Why critical temperature is lower than melting temperature?
the critical temperature is for the phase stability? When the phase changes,the energy needed is smaller than the material melton,
What is intercritical annealing?
Intercritical annealing is where the metal is heated to between its lower and upper critical temperature point to allow partial transformation of the matrix into austenite followed by slow cooling or holding below the lower critical temperature point.
What is the critical temparature?
The temperature at which all the physical states of matter are coexists is called critical temperature. The temperature above that the gas can not be liquefied is called critical temperature of that gas.Gases with high critical temperature are liquefied easily.
What are the critical temperatures of iron -carbon equilibrium diagram?
At the time I'm writing this answer, I'm astudent of BSc Metallurgical & Materials Engineering and I've had a brief study of Iron-Carbon diagram recently. I hope my answer helps. The Lower Critical Temperature is 1333o F. The Upper Critical Temperature is 2066o F.
What is the critical temperature of oxygen?
the critical temperature of oxygen is -118.6 C/ -155 F
What is the upper and lower critical temperature of steel?
upper critical temp. means 273k and lower temp. means -273k.now 50 deg cent. above upper cri. temp means 273+50 deg cent.(=273+323)kelvin
The lowest temperature a superconducter can work at?
0oK, or absolute zero is the lowest temperature. Superconductors have a critical temperature at which they begin to work, but it is the highest temperature, and they function as superconductors at any temperature lower, down to as close to absolute zero as they can be made to be (absolute zero is unachievable).
What is Spheroidising?
Spheroidising Heat to just below Lower Critical Temperature. (about 650-700 deg C) Cool very slowly in the furnace
What is the importance of critical pressure?
The critical pressure of a substance is the pressure required to liquefy a gas at its critical temperature. Some examples are shown below.
What is critical temperature of gasoline?
The critical temperature of gasoline is the temperature at which it becomes combustible and varies according to the pressure the gas is under. On average this temperature is 241 degrees Celsius.
What is pseudo critical pressure and temperature?
A pseudo-critical substance is a mixture of two or more fluids at their joint critical pressures. A critical fluid is a fluid at its critical pressure and temperature. At this point, it is no longer possible to distinguish between gas and liquid, due to the high pressure and temperature.
What is the definition of critical Temperature of a Refrigerant?
the temperature which occupied to liquefy the gas at its critical pressure and critical volume ,it is represented by Tc. --------------------------------------------------------------------------------------------- Rafaelrz. The Critical Temperature of a fluid is the maximum temperature at which it's vapor form can be liquefied by increasing pressure. The pressure required in this case is the Critical Pressure of the fluid. At the same time the Critical Pressure of a fluid is the maximum pressure at which you can liquefy a gas by reducing it's temperature. The Critical Point of a fluid is the state of the fluid at it's critical temperature and pressure (The Critical State of the fluid), and the specific volume (m3/kg) or molar volume (m3/kmol) observed, is the Critical Volume (mass or molar). An interesting fact is that at the Critical State, the liquid phase and vapor phase at equilibrium show similar properties.
