Materials Science And Engineering Properties
Materials Science And Engineering Properties
1st Edition
ISBN: 9781111988609
Author: Charles Gilmore
Publisher: Cengage Learning
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Chapter 4, Problem 4.6P
To determine

The mold cavity length of the yellow brass casting.

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Using the isothermal transformation diagram for a 0.45 wt% C steel alloy (Figure 10.40), determine the final microstructure (in terms of just the microconstituents present) AND approximate percentages of the microconstituents that form in a small specimen that has been subjected to the following time-temperature treatments. In each case assume that the specimen begins at 845°C (1550°F), and that it has been held at this temperature long enough to have achieved a complete and homogeneous austenitic structure. (a) Rapidly cool to 250°C (480°F), hold for 10^3 s, then quench to room temperature. (b) Rapidly cool to 700°C (1290°F), hold for 30 s, then quench to room temperature. (c) Rapidly cool to 700°C (1290°F), hold at this temperature for 10^5 s, then quench to room temperature.  (d) Rapidly cool to 400°C (750°F), hold for 500 s, then quench to room temperature.
View Policies Current Attempt in Progress Using the Animated Figure 10.40, the isothermal transformation diagram for a 0.45 wt% C steel alloy, specify the nature of the final microstructure (in terms of the microconstituents present) of a small specimen that has been subjected to the following temperature treatments. In each case assume that the specimen begins at 845 °C and that it has been held at this temperature long enough to have achieved a complete and homogeneous austenitic structure. a) Rapidly cool to 700 degrees C, hold for 100,000 s, then quench to room temperature. b) Rapidly cool to 450 degrees C, hold for 10 s, then quench to room temperature. proeutectoid ferrite + pearlite proeutectoid ferrite + martensite proeutectoid ferrite + pearlite + martensite eT proeutectoid ferrite + pearlite + bainite + martensite all spheroidite Save all bainite Attempts: 0 of 5 used Submit Answer all martensite bainite + martensite
A sufficient amount of pure copper is(4 to be heated for casting a large plate in an open mold. The plate has dimensions: length = 20 in, width=D10 in, and thickness =3 in. Compute the amount of heat that must be added to the metal to heat it to a temperature of 21500F for pouring. Assume that the amount of metal heated will be 10% more than what is needed to fill the mold cavity. Properties of the metal are: density=0.324 Ibm/in3, melting point = 19810F, specific heat of the %3D metal=0.093Btu/lbm-F in the solid state and 0.090 Btu/lbm-F in the liquid * .state, and heat of fusion = 80 Btu/lbm
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Materials Science And Engineering Properties
Civil Engineering
ISBN:9781111988609
Author:Charles Gilmore
Publisher:Cengage Learning