subject
Engineering, 27.12.2019 00:31 katiepotter

Which one of the following statements is true? explain whether each is true or false.

a] pearlite and bainite are examples of phases that can be formed by austenite if the cooling rate
is controlled appropriately.
(b)
when austenite containing 1.2 percent carbon by weight (and no significant amounts of anyother alloying elements) is cooled slowly, hypereutectic fe3c will form above 727�c.
(c)1040 plain carbon steel cannot be spheroidized.
(d)when a metal exhibits a single, well defined freezing temperature, all the crystals formed on cooling will have the same composition.
(e)the hardenability of 1060 plain carbon steeldoes not depend on the hardness of the sample at room temperature prior to heat treatment.

ansver
Answers: 3

Other questions on the subject: Engineering

image
Engineering, 04.07.2019 18:10, katelynn73
Atmospheric air has a temperature (dry bulb) of 80° f and a wet bulb temperature of 60° f when the barometric pressure is 14.696 psia. determine the specific humidity, grains/lb dry air. a. 11.4 c. 55.8 d. 22.5 b. 44.1
Answers: 1
image
Engineering, 04.07.2019 18:10, wyattlb97
Water at the rate of 1 kg/s is forced through a tube with a 2.5 cm inner diameter. the inlet water temperature is 15°c, and the outlet water temperature is 50°c. the tube wall temperature is 14°c higher than the local water temperature all along the length of the tube. what is the length of the tube?
Answers: 3
image
Engineering, 04.07.2019 18:20, maciemarklin79981
A3-mm-thick panel of aluminum alloy (k 177 w/m-k, c 875 j/kg-k and ? = 2770 kg/m) is finished on both sides with an epoxy coating that must be cured at or above t,-150°c for at least 5 min. the production line for the curing operation involves two steps: (1) heating in a large oven with air at ts,0-175°c and a convection coefficient of h, 40 w/m2. k, and (2) cooling in a large chamber with air at 25°c and a con- vection coefficient of he 10 w/m2.k. the heating portion of the process is conducted over a time interval te which exceeds the ime required to reach 150°c by 5 min (h = r + 300 s). the coating has an emissivity of ? = 0.8, and the temperatures of the oven and chamber walls are 175 and 25°c, respectively. if the panel is placed in the oven at an initial temperature of 25°c and removed from the chamber at a safe-to-touch tempera ture of 37°c, what is the total elapsed time for the two-step curing operation?
Answers: 3
image
Engineering, 04.07.2019 19:10, gabigalvis1091
What is the main objective of using reheat rankine cycle?
Answers: 3
You know the right answer?
Which one of the following statements is true? explain whether each is true or false.

a...

Questions in other subjects: