Welding: Principles and Applications (MindTap Course List)
8th Edition
ISBN: 9781305494695
Author: Larry Jeffus
Publisher: Cengage Learning
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Textbook Question
Chapter 17, Problem 3R
What can cause tungsten contamination?
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what should the amperage and voltage range be using 98% Ac+2% to weld 1/4-in metal with 0.045-in wire?
If you need narrow deep penetration weld for heavv base metal, which type of current polarity
you will use with DC current?
The strength in the weld zone of an age-hardening aluminium alloy is often higher than in the heat affect zone (HAZ). Which of the following is NOT a reason for this?
O The maximum temperature is higher in the weld pushing more of the hardening phase into solution.
O Particles that don't dissolve might transform into equilibrium phases instead. This is more likely in the HAZ.
O The greater dissolution of particles in the weld leads to greater solid solution strengthening.
O The increase in solute in the matrix allows more subsequent natural aging to occur in the weld zone.
O Particles in the HAZ tend to dissolve, while those in the weld coarsen. The increase in particle size and spacing reduces the strength of HAZ.
Chapter 17 Solutions
Welding: Principles and Applications (MindTap Course List)
Ch. 17 - What effect does torch angle have on the shielding...Ch. 17 - Why must the end of the filler rod be kept in the...Ch. 17 - What can cause tungsten contamination?Ch. 17 - What determines the correct current setting for a...Ch. 17 - What is the lowest acceptable amperage setting for...Ch. 17 - List the factors that affect the gas flow setting...Ch. 17 - When should the minimum gas flow rates be...Ch. 17 - What is the minimum gas flow rate for a nozzle...Ch. 17 - What is the maximum gas flow rate for a nozzle...Ch. 17 - Which incorrect welding parameters does stainless...
Ch. 17 - Using Table 17-4, determine the approximate...Ch. 17 - Using Table 17-3, Table 17-5, and Table 17-6, list...Ch. 17 - Why is it possible to control a large aluminum...Ch. 17 - What may happen to the end of the aluminum welding...Ch. 17 - What should be done if someone comes in contact...Ch. 17 - Using Table 17-7, determine the suggested setting...Ch. 17 - What can be done to limit oxide formation on...Ch. 17 - How should the filler metal be added to the molten...Ch. 17 - How can the rod be freed if it sticks to the...Ch. 17 - How is an outside corner joint assembled?Ch. 17 - What must be done with the weld craters when back...Ch. 17 - What can prevent both sides of a stainless steel...Ch. 17 - How is the filler metal added for a 3F weld?Ch. 17 - What can cause undercutting on a 3F tee joint?Ch. 17 - What helps hold the weld in place on a 2F lap...Ch. 17 - What helps hold the weld in place on a 4G weld?
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