Welding: Principles and Applications (MindTap Course List)
8th Edition
ISBN: 9781305494695
Author: Larry Jeffus
Publisher: Cengage Learning
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Textbook Question
Chapter 33, Problem 8R
What are the three primary functions that a flux must perform?
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what happened with the 10 in the first equation?
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.
b) An I-beam made of 4140 steel is heat treated to form tempered martensite. It is then welded to a 4140 steel plate and cooled rapidly back to room temperature. During use, the I-beam and the plate experience an impact load, but it is the weld which breaks. What happened?
Chapter 33 Solutions
Welding: Principles and Applications (MindTap Course List)
Ch. 33 - Explain the difference between brazing and...Ch. 33 - How does capillary action separate brazing from...Ch. 33 - Why can brazing be both a permanent and a...Ch. 33 - Why is it less likely that a part would be damaged...Ch. 33 - What is the effect of joint spacing on joint...Ch. 33 - Why are braze joints subject to fatigue failure?Ch. 33 - Do all braze joints resist corrosion? Give an...Ch. 33 - What are the three primary functions that a flux...Ch. 33 - In what forms are fluxes available?Ch. 33 - How can liquid fluxes be delivered to the joint...
Ch. 33 - How do fluxes react with the base metal?Ch. 33 - How are brazing and soldering methods grouped?Ch. 33 - What are the advantages of torch soldering?Ch. 33 - What are the advantages of furnace brazing?Ch. 33 - How does the induction brazing method heat the...Ch. 33 - What soldering process can be used to join parts...Ch. 33 - What brazing or soldering process uses a machine...Ch. 33 - What is a metal alloy?Ch. 33 - Why must parts not be moved as they cool through...Ch. 33 - Why must you not use tin-lead solders on water...Ch. 33 - Using Table 33-3, determine the approximate...Ch. 33 - What is a major use of tin-antimony solder?Ch. 33 - What solder alloy can retain its strength at...Ch. 33 - Why do brazing alloys use letters such as CuZn to...Ch. 33 - What is the white smoke that can be given off from...Ch. 33 - Which copper-zinc brazing alloy could be used to...Ch. 33 - Why should copper-phosphorus not be used on...Ch. 33 - Silver-copper alloys can be used to join which...Ch. 33 - Which nickel alloy would be best for joining the...Ch. 33 - Why does BCu-2 brazing alloy use an organic...Ch. 33 - Using Table 33-6, determine the ideal joint...Ch. 33 - What indicates that you have overheated the solder...Ch. 33 - How can the size of a braze bead be controlled?Ch. 33 - Why is brazing a better process than welding to...
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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
- Why are alloying elements added to the flux?arrow_forwardIn the pulsed-arc metal transfer current cycle, what is the term used to describe how the electric current in a transformer takes a few milliseconds to build up the magnetic field to full strength once the coil is energized?arrow_forwardWhat functions regarding tungsten heat do the collet and torch play?arrow_forward
- When the molten metal is transferred from the electrode to the weld zone, it can be shielded from the atmosphere by: a. the heating of heat affected zone b. the burning of coatings of the welding electrode C. the fusion of base metal d. the flow of a shielding gas around the arc e. maintaining the arc beneath flux powdersarrow_forwardWhich of the following does not belong to the group? force stress time velocityarrow_forwardChoose the bestarrow_forward
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