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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Textbook Question
Chapter 3, Problem 35RQ
What is the difference between an edge dislocation and a screw dislocation?
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Which can cross-slip––an edge dislocation, a screw dislocation, or a mixed dislocation? Why?
Dislocation movement is hindered by:
(This question has more than one correct answer)
a. Increase in impurity atom concentration
b. Reduced grain size
c. High angles of misalignment between grains
d. Plastic deformation during loading
The following figure displays both an Edge Dislocation and a Screw Dislocation. Answer the
following questions regarding the characteristics of each Dislocation
Edge dislocation
Screw dislocation
Chapter 3 Solutions
Degarmo's Materials And Processes In Manufacturing
Ch. 3 - What enables us to control the properties and...Ch. 3 - Â What are the next levels of structure that are...Ch. 3 - Prob. 3RQCh. 3 - Prob. 4RQCh. 3 - Prob. 5RQCh. 3 - Prob. 6RQCh. 3 - What are the three types of primary bonds, and...Ch. 3 - What are some general characteristics of...Ch. 3 - Prob. 9RQCh. 3 - Prob. 10RQ
Ch. 3 - Prob. 11RQCh. 3 - Prob. 12RQCh. 3 - Prob. 13RQCh. 3 - What are some unique property features of...Ch. 3 - Prob. 15RQCh. 3 - Prob. 16RQCh. 3 - Prob. 17RQCh. 3 - What are some of the general characteristics of...Ch. 3 - Prob. 19RQCh. 3 - Prob. 20RQCh. 3 - Prob. 21RQCh. 3 - Prob. 22RQCh. 3 - Prob. 23RQCh. 3 - Prob. 24RQCh. 3 - What is a grain? A grain boundary?Ch. 3 - Prob. 26RQCh. 3 - What is implied by a low ASTM grain�size number?...Ch. 3 - Prob. 28RQCh. 3 - What is Poissons ratio, and under what conditions...Ch. 3 - What is plastic deformation?Ch. 3 - Why do metals retain their strength during plastic...Ch. 3 - Prob. 32RQCh. 3 - Prob. 33RQCh. 3 - What is a dislocation? Using the carpet analogy,...Ch. 3 - What is the difference between an edge dislocation...Ch. 3 - What are some of the common barriers to...Ch. 3 - Prob. 37RQCh. 3 - What is the mechanism (or mechanisms) responsible...Ch. 3 - Why is a fine grain size often desired in an...Ch. 3 - What is an anisotropic property? Why might...Ch. 3 - What is the difference between brittle fracture...Ch. 3 - How does a metal increase its internal energy...Ch. 3 - What is required in order to drive the...Ch. 3 - How might the lowest recrystallization temperature...Ch. 3 - In what ways can recrystallization be used to...Ch. 3 - What is the major distinguishing feature between...Ch. 3 - What is warm working?Ch. 3 - How can deformation and recrystallization improve...Ch. 3 - Why is grain growth usually undesirable?Ch. 3 - Prob. 50RQCh. 3 - As a result of their ionic or covalent bonding,...Ch. 3 - Prob. 52RQCh. 3 - Prob. 53RQCh. 3 - What is the difference between an intrinsic...Ch. 3 - What is required for electrical conductivity in...Ch. 3 - What is required for electrical conductivity in...Ch. 3 - Brass is an alloy of copper with a certain amount...Ch. 3 - It is not uncommon for processing operations to...Ch. 3 - Polyethylene consists of fibrous molecules of...Ch. 3 - Prob. 5P
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Sketch following modes of dislocation motion and name conditions that help them occur: 1. Cross slip 2. Climb up & climb downarrow_forwardIf a series of dislocations produced by a single FrankRead source encounter an impassible barrier, a back stress is created. What is the reason for this back stress, and why is it very effective for dislocations produced by a single F-R source?arrow_forwardDraw a simple sketch and explain the dislocation climb mechanism. How does temperature affect the climbing mechanism?arrow_forward
- For each of edge, screw, and mixed dislocations, cite the relationship between the direction of the applied shear stress and the direction of dislocation line motion.arrow_forwardWhen a cold-worked metal is heat-treated below its melting point over a period of time, which of the following phenomena occur? (This question has more than one correct answer) a. Strength is increased b. Dislocation density decreases c. Grain size increases d. Internal lattice strains decrease e. Ductility is reducedarrow_forwardIn figure 2 there is no chance for dislocation Is the strength in this case high and the ductility low?arrow_forward
- Nonearrow_forwardA hypothetical face-centred cubic metal has a lattice parameter a = 0.400 nm. A singlecrystalline bar made from the metal has a length of 20 mm and a diameter of 2 mm. TheBurgers vector of dislocations in the metal is <110>/2. Assuming only one slip system isactivated during uniform tensile straining and the angle between the direction of the Burgersvector of the dislocations and the tensile direction is 60°. Calculate the number of dislocationsneeded to achieve an engineering plastic strain of 10%. (pls give full handwritten solution to this)arrow_forwardA hypothetical face-centred cubic metal has a lattice parameter a = 0.400 nm. A singlecrystalline bar made from the metal has a length of 20 mm and a diameter of 2 mm. TheBurgers vector of dislocations in the metal is <110>/2. Assuming only one slip system isactivated during uniform tensile straining and the angle between the direction of the Burgersvector of the dislocations and the tensile direction is 60°. Calculate the number of dislocationsneeded to achieve an engineering plastic strain of 10%. (pls provide full calculations)arrow_forward
- 2. Sketch: a. 3 stages of single crystal stress-strain curve under uniaxial stress b. Frank-Reed mechanism for dislocation multiplication.arrow_forwardFigure 1 shows the schematic representation of how a metal atom moves under an applied force during deformation. Select the reasons why metallic bonding that occurs between metal atoms generally has good ductility. I. Sharing of the electron that forms strong electrostatic attraction between the atoms. II. Capability to break and reform bonding between atoms. III. Dipole moment attraction between atoms. IV. Free electrons in the electron cloud between atoms. A. I and II B. I and III C. I and IV D. I and IV E. All the answer is incorrect Direction Figure 1: Schematic representation of deformation in metal 000 000000arrow_forwardHow do dislocationjunctions contributeto strengthening?arrow_forward
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Dislocations and Plastic Deformation; Author: LearnChemE;https://www.youtube.com/watch?v=cpvTwYAUeA8;License: Standard Youtube License