Welding: Principles and Applications (MindTap Course List)
8th Edition
ISBN: 9781305494695
Author: Larry Jeffus
Publisher: Cengage Learning
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Textbook Question
Chapter 26, Problem 41R
When do cold cracks develop?
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Chapter 26 Solutions
Welding: Principles and Applications (MindTap Course List)
Ch. 26 - What gives metals their desirable properties?Ch. 26 - What is heat?Ch. 26 - What are the basic units of measure for heat?Ch. 26 - What is sensible heat?Ch. 26 - Prob. 5RCh. 26 - What does the color of light given off from a hot...Ch. 26 - Prob. 7RCh. 26 - In steel-making, what is ore combined with in the...Ch. 26 - Prob. 9RCh. 26 - What is an alloy?
Ch. 26 - Using Figure 26-18, answer the following...Ch. 26 - What is a eutectic composition?Ch. 26 - Using Table 26-3, what are the lowest and highest...Ch. 26 - Approximately how many degrees wide is the...Ch. 26 - Referring to Figure 26-20, what color would...Ch. 26 - Referring to Figure 26-20, what is the approximate...Ch. 26 - Prob. 17RCh. 26 - Referring to Figure 26-20, above what temperature...Ch. 26 - Prob. 19RCh. 26 - What is known as the critical temperature of...Ch. 26 - Can a metal have all the mechanical properties at...Ch. 26 - What other properties can a metal's hardness...Ch. 26 - Which property, brittleness or ductility, will let...Ch. 26 - What is toughness?Ch. 26 - What are the common types of strength...Ch. 26 - Prob. 26RCh. 26 - What are the three steps in precipitation...Ch. 26 - How do ferrite and cementite work together to form...Ch. 26 - Why is brine quenching faster than water...Ch. 26 - What can be done to speed up the quenching rate in...Ch. 26 - Why is the formation of martensite a problem when...Ch. 26 - How can the effects of cold working be removed?Ch. 26 - Prob. 33RCh. 26 - Referring to Figure 26-20, what would the preheat...Ch. 26 - Why must the stress-relieving temperature be kept...Ch. 26 - What properties can annealing produce in metals?Ch. 26 - How long does it take the weld metal to go through...Ch. 26 - What are some sources of hydrogen that can...Ch. 26 - How can nitrogen get into an SMA weld?Ch. 26 - What are some of the problems that oxygen can...Ch. 26 - When do cold cracks develop?Ch. 26 - What is carbide precipitation?
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- How does point defect affects the property of a material?arrow_forwardWhy do the Brittle materials fail in tension?arrow_forwardQUESTION 1 Select from the following statements, those which describe the process and conditions required for brittle fracture. (Note: Partial credit is not available for this question. Credit will only be awarded if all correct answers, and no incorrect answers, are selected). A. Occurs along defined crystallographic planes, thus leaving smooth fracture surfaces B. Occurs due to repeated loading and unloading below the yield strength of the material OC. Occurs in materials where the bonding strength is high relative to the yield strength D. The stress concentration at the crack tip exceeds the inter-atomic bonding energy ☐ E. Involves the nucleation, growth and coalescence of voids, thus resulting in rough fracture surfaces OF. Is a slow process whereby there is warning prior to failurearrow_forward
- 2. The flow curve expresses the behavior of a metal in which of the following regions of the stress strain curve? (a) plastic region. (b) elastic region, or (c) both of them. 3. Which one of the following materials has the highest hardness? (a) high carbon steel. (b) gray cast iron, (c) hardened tool steel, (d) alumina, or (e) polystyrene. 1. Cracks are an example of which one of the following types of crystal structure defects? (a) dislocation. (b) volume defects. (c) line defects, (d) point defects, or (e) surface defects. 5. If strain measurements were made during a tensile test, which of the following would have the higher value? (a) engineering stain, (b) true strain, or (c) both are equal. 6. Identify which of the following materials is not ceramic? (a) glass, (b) diamond, (c) SiC. (d) TiC, or (e) alumina.arrow_forwardWhen does stress concentration occur?arrow_forwardWhen performing a quench to cool a product, the quench rate affects the outcome of the process. TRUE OR FALSE: 3 principal driving forces for the development of mechanical properties during heat treatment. Group of answer choices Microstructure Changes Formation of Surface Oxide Cooling Rate Ambient Temperature Heating Rate Diffusion Rate Heating Methodarrow_forward
- Plasticity induced crack closure phenomenon involves follows which of the following mechanism Residual compressive stress on the previous plastically deformed material behind the crack front helps in crack closure Phase transformation takes place ahead of crack front which help in crack closure Displacement due to mode II loading induces crack closure Oxide scale formation at the crack tip helps in crack closurearrow_forwardDuctile and brittle fracture (what are they, how do they look under microscope)arrow_forwardDiscuss the concept of stresses? State the properties could be drawn from the stress strain diagramsarrow_forward
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