Foundations of Materials Science and Engineering
6th Edition
ISBN: 9781259696558
Author: SMITH
Publisher: MCG
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Chapter 4.8, Problem 66SEP
To determine
In the figure 4.34, the dislocations are highlighted with arrows and the letter “d.”, verify that what the scientist designates as an edge dislocation is in fact an edge dislocation and also, discuss how the scientist knows that a stacking fault exists at the top of the image.
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WHAT is meant by dislocation? State different types of dislocation with neat sketches .
1. Dislocations: What Are They? What makes them significant in metals and alloys? By drawing a 2D ball and stick model, you can highlight the key characteristics of an edge dislocation, including the extra-half plane, dislocation center, slip plane, sense vector, and Burgers vector.
2.What are the Burgers and sensation (dislocation line) vectors used for?
Please answer all with full detail
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 4 Solutions
Foundations of Materials Science and Engineering
Ch. 4.8 - Prob. 1KCPCh. 4.8 - Define the homogeneous nucleation process for the...Ch. 4.8 - In the solidification of a pure metal, what are...Ch. 4.8 - In the solidification of a metal, what is the...Ch. 4.8 - During solidification, how does the degree of...Ch. 4.8 - Distinguish between homogeneous and heterogeneous...Ch. 4.8 - Describe the grain structure of a metal ingot that...Ch. 4.8 - Distinguish between equiaxed and columnar grains...Ch. 4.8 - How can the grain size of a cast ingot be refined?...Ch. 4.8 - Prob. 10KCP
Ch. 4.8 - Prob. 11KCPCh. 4.8 - Prob. 12KCPCh. 4.8 - Distinguish between a substitutional solid...Ch. 4.8 - What are the conditions that are favorable for...Ch. 4.8 - Prob. 15KCPCh. 4.8 - Prob. 16KCPCh. 4.8 - Prob. 17KCPCh. 4.8 - Prob. 18KCPCh. 4.8 - Describe the structure of a grain boundary. Why...Ch. 4.8 - Describe and illustrate the following planar...Ch. 4.8 - Prob. 21KCPCh. 4.8 - Describe the optical metallography technique. What...Ch. 4.8 - Prob. 23KCPCh. 4.8 - Prob. 24KCPCh. 4.8 - Prob. 25KCPCh. 4.8 - Prob. 26KCPCh. 4.8 - Prob. 27KCPCh. 4.8 - Prob. 28KCPCh. 4.8 - Prob. 29KCPCh. 4.8 - Prob. 30KCPCh. 4.8 - Prob. 31KCPCh. 4.8 - Calculate the size (radius) of the critically...Ch. 4.8 - Prob. 33AAPCh. 4.8 - Prob. 34AAPCh. 4.8 - Calculate the number of atoms in a critically...Ch. 4.8 - Prob. 36AAPCh. 4.8 - Prob. 37AAPCh. 4.8 - Prob. 38AAPCh. 4.8 - Prob. 39AAPCh. 4.8 - Prob. 40AAPCh. 4.8 - Prob. 41AAPCh. 4.8 - Prob. 42AAPCh. 4.8 - Determine, by counting, the ASTM grain-size number...Ch. 4.8 - Prob. 44AAPCh. 4.8 - For the grain structure in Problem 4.43, estimate...Ch. 4.8 - Prob. 46AAPCh. 4.8 - Prob. 47SEPCh. 4.8 - Prob. 48SEPCh. 4.8 - Prob. 49SEPCh. 4.8 - Prob. 50SEPCh. 4.8 - In Chapter 3 (Example Problem 3.11), we calculated...Ch. 4.8 - Prob. 52SEPCh. 4.8 - Prob. 53SEPCh. 4.8 - Prob. 54SEPCh. 4.8 - Prob. 55SEPCh. 4.8 - Prob. 56SEPCh. 4.8 - Prob. 57SEPCh. 4.8 - Prob. 58SEPCh. 4.8 - Prob. 59SEPCh. 4.8 - Prob. 60SEPCh. 4.8 - Prob. 61SEPCh. 4.8 - Prob. 62SEPCh. 4.8 - Prob. 63SEPCh. 4.8 - Prob. 64SEPCh. 4.8 - Prob. 65SEPCh. 4.8 - Prob. 66SEP
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- The crystal shown in below figure contains two dislocations A and B. If a shear stress isapplied to the crystal as shown, what will happen to dislocations A and B? Demonstratewith proper illustration.arrow_forwardQ-1) Suppose you would like to introduce an interstitial or large substitutional atom into the crystal near a dislocation. Would the atom fit more easily above or below the dislocation line shown in Figure? Explain. Shear stressarrow_forwarddislocation theory in following figures calculate applied Force from dislocation A(b) to dislocation B(b') using relation Peach-Koehler الف( la B (b') | A (b) F, (5 B (b') b' A (b)arrow_forward
- 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 loadingarrow_forwardConsider an aluminum polycrystal with a grain size of 10 μm. If a dislocationsource at the center of a grain emits dislocations under an appliedshear stress of 50 MPa that pile up at the grain boundaries, what is the stressexperienced by a grain boundary? Take G = 26 GPa and b = 0.3 nm.arrow_forward...to the dislocation In mixed dislocation, the slip vector is O A. Nether parallel nor normal O B. Parallel O C. Both parallel and Normal O D. Normalarrow_forward
- 6. Sketch how two edge dislocations of opposite sign on the same slip plane can anihilate each other C. two screw dislocations of opposite sign also annihilate each other?arrow_forwardDraw a simple sketch and explain the dislocation climb mechanism. How does temperature affect the climbing mechanism?arrow_forwardFor austenitic stainless steel, Cu, and Al (all FCC metals): a. Calculate the actual magnitudes of the full and partial dislocations, assuming that the lattice parameters are 0.365 nm, 0.362 nm, and 0.405 nm, respectively. b. Calculate the equilibrium partial dislocation separation distance d for all three materials. c. Put the numbers from part (b) in context by comparing them to the atomic size (diameter) and lattice parameter for each material. d. In which of the three material(s) is wavy glide very likely to be observed?arrow_forward
- Silver Ag has the fcc crystal structure as shown in the figure below. Determine its atomic packing factor APF? Given: The radius of Germanium: r(Ag)= 0.144 nm.  Select one: a. 0.14 b. 0.34 c. 0.68 d. 0.12 e. 0.4 f. 0.51 g. 0.74 h. 0.21arrow_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_forwardExplain the following, using dislocation theory: metal strengthening by: (a) grain size (b) solid solution strengthening (c) strain hardening (d) quenching in cold water following heating close to melting pt ( hint: Nv = Nexp(-Qv/kT)arrow_forward
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Dislocations and Plastic Deformation; Author: LearnChemE;https://www.youtube.com/watch?v=cpvTwYAUeA8;License: Standard Youtube License