Welding: Principles and Applications (MindTap Course List)
8th Edition
ISBN: 9781305494695
Author: Larry Jeffus
Publisher: Cengage Learning
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Chapter 18, Problem 27R
Why are stringer beads in the 6G position kept small?
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Qu 3 Nickel (Ni) single crystal turbine blades burn less fuel at higher temperatures because blades are grown on [110] closed packed direction. Nickel (Ni) at 20°C is FCC, and has an atomic radius, R, of 0.125 nm. Draw a reduced-sphere unit cell for this crystal and draw and label the vector [I 10], starting from the origin (0, 0, 0).
a) Calculate the length of the vector [| 10] in nanometers. Express your answer in nanometers to one significant figure.
b) Calculate the linear density of Nickel in the [| 1 0] direction in [atom/nm]. Express your answer in atoms/nm to one significant figure.
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Chapter 18 Solutions
Welding: Principles and Applications (MindTap Course List)
Ch. 18 - What types of industries require GTAW-quality pipe...Ch. 18 - What are the grooves most often used for welding...Ch. 18 - What condition must the prepared edges of a pipe...Ch. 18 - How is the depth of root penetration measured?Ch. 18 - What problem can incomplete fusion cause?Ch. 18 - What are the common causes of a concave root...Ch. 18 - What problems can excessive root reinforcement...Ch. 18 - Prob. 8RCh. 18 - What gases are used as backing gases?Ch. 18 - How long would it take to purge a 15-ft section of...
Ch. 18 - How long would it take to purge a 10-mm section of...Ch. 18 - How can filler metal be added to make a root pass?Ch. 18 - Prob. 13RCh. 18 - How is the tack weld ended so that it will not...Ch. 18 - What is the 1G pipe position?Ch. 18 - After the weld is set up and ready to begin, how...Ch. 18 - What type of weld can be made using the nozzle...Ch. 18 - What two problems can be corrected by a hot pass?Ch. 18 - Why must you brace yourself when making a weld?Ch. 18 - What can happen to the weld pool if the torch...Ch. 18 - What technique should be used when stopping a...Ch. 18 - What is the maximum width that a weave pattern...Ch. 18 - Why should the filler pass penetration be limited...Ch. 18 - How much filler metal should be added to a filler...Ch. 18 - What is the 5G pipe position?Ch. 18 - How should the torch be held to allow good...Ch. 18 - Why are stringer beads in the 6G position kept...
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- handwritten-solutions, please!arrow_forwardRequired information An eccentric force P is applied as shown to a steel bar of 25 × 90-mm cross section. The strains at A and B have been measured and found to be εΑ = +490 μ εB=-70 μ Know that E = 200 GPa. 25 mm 30 mm 90 mm 45 mm B Determine the distance d. The distance dis 15 mm mm.arrow_forwardhandwritten-solutions, please!arrow_forward
- handwritten-solutions, please!arrow_forward! Required information Assume that the couple shown acts in a vertical plane. Take M = 25 kip.in. r = 0.75 in. A B 4.8 in. M 1.2 in. [1.2 in. Determine the stress at point B. The stress at point B is ksi.arrow_forwardhandwritten-solutions, please!arrow_forward
- handwritten-solutions, please!arrow_forwardNo use chatgptarrow_forwardProblem 6 (Optional, extra 6 points) 150 mm 150 mm 120 mm 80 mm 60 mm PROBLEM 18.103 A 2.5 kg homogeneous disk of radius 80 mm rotates with an angular velocity ₁ with respect to arm ABC, which is welded to a shaft DCE rotating as shown at the constant rate w212 rad/s. Friction in the bearing at A causes ₁ to decrease at the rate of 15 rad/s². Determine the dynamic reactions at D and E at a time when ₁ has decreased to 50 rad/s. Answer: 5=-22.01 +26.8} N E=-21.2-5.20Ĵ Narrow_forward
- Problem 1. Two uniform rods AB and CE, each of weight 3 lb and length 2 ft, are welded to each other at their midpoints. Knowing that this assembly has an angular velocity of constant magnitude c = 12 rad/s, determine: (1). the magnitude and direction of the angular momentum HD of the assembly about D. (2). the dynamic reactions (ignore mg) at the bearings at A and B. 9 in. 3 in. 03 9 in. 3 in. Answers: HD = 0.162 i +0.184 j slug-ft²/s HG = 2.21 k Ay =-1.1 lb; Az = 0; By = 1.1 lb; B₂ = 0.arrow_forwardProblem 5 (Optional, extra 6 points) A 6-lb homogeneous disk of radius 3 in. spins as shown at the constant rate w₁ = 60 rad/s. The disk is supported by the fork-ended rod AB, which is welded to the vertical shaft CBD. The system is at rest when a couple Mo= (0.25ft-lb)j is applied to the shaft for 2 s and then removed. Determine the dynamic reactions at C and D before and after the couple has been removed at 2 s. 4 in. C B Mo 5 in 4 in. Note: 2 rotating around CD induced by Mo is NOT constant before Mo is removed. and ₂ (two unknowns) are related by the equation: ₂ =0+ w₂t 3 in. Partial Answer (after Mo has been removed): C-7.81+7.43k lb D -7.81 7.43 lbarrow_forwardProblem 4. A homogeneous disk with radius and mass m is mounted on an axle OG with length L and a negligible mass. The axle is pivoted at the fixed-point O, and the disk is constrained to roll on a horizontal surface. The disk rotates counterclockwise at the constant rate o₁ about the axle. (mg must be included into your calculation) (a). Calculate the linear velocity of G and indicate it on the figure. (b). Calculate ₂ (constant), which is the angular velocity of the axle OG around the vertical axis. (c). Calculate the linear acceleration ā of G and indicate it on the figure. (d). Determine the force (assumed vertical) exerted by the floor on the disk (e). Determine the reaction at the pivot O. 1 Answers: N = mg +mr(r/L)² @² |j mr w IIG C R L i+ 2L =arrow_forward
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