Degarmo's Materials And Processes In Manufacturing
Degarmo's Materials And Processes In Manufacturing
13th Edition
ISBN: 9781119492825
Author: Black, J. Temple, Kohser, Ronald A., Author.
Publisher: Wiley,
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Chapter 4, Problem 14RQ

What types of changes occur upon cooling through a liquidus line? A solidus line? A solvus line?

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What are some possible defects in drawn sheet-metal parts? In blanking of a circular sheet-metal part, is the clearance applied to the punch diameter or the die diameter? What is martensite? Based on the TTT curve, what is it that should be avoided during martensitic process? What is the main condition for strengthening an alloy by precipitation?
What are the critical differences between work hardening and geometric hardening?
Q1/ In a homogeneous solidification process, assume molten metal solidifies into a spherical nucleus with a BCC structure. The given data are; lattice parameter (0.292 nm), the heat of fusion energy (1.85×10-9 J/m³), latent surface free energy (0.204 J/m²), critical radius (1-35 nm), equilibrium melting temperature (1516 K), and room temperature (27 °C). Calculate the following for this metal; (a) supercooling value temperature (b) activation tree energy (c) number of atoms in a nucleus of critical size.

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Degarmo's Materials And Processes In Manufacturing

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