DeGarmo's Materials and Processes in Manufacturing
12th Edition
ISBN: 9781118987674
Author: J. T. Black, Ronald A. Kohser
Publisher: WILEY
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Textbook Question
Chapter 32, Problem 3CS
What effect would abrupt surface changes, such as tool marks or surface flaws, have on fatigue life?
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Which three of the following are names given to the three regions in the typical wear growth curve: (Choose three answers)
temperature region
diffusion region
failure region
0000000
accelerated wear region
break-in period
steady-state wear
abrasion region
6
Fatigue cracks may happen due to weakening of surface layer in hot working.
Select one:
True
False
)
Given your understanding of what initiates and controls failure in materials, which of the following will increase the failure strength or lifetime
of a test piece or component and why?
a. Polishing to reduce surface defects
b. Decreasing the temperature below the brittle-ductile transition temperature, to make it harder
C. Increasing its volume, to give a larger cross sectional area
d. Increasing the grain size so there are less grain boundaries to initiate failure
e. Decreasing the difference between the maximum and minimum stress values, as this effects the stress concentration factor
Chapter 32 Solutions
DeGarmo's Materials and Processes in Manufacturing
Ch. 32 - Why are surface processes so important?Ch. 32 - What are some of the factors that should be...Ch. 32 - How is the surface and its integrity altered by...Ch. 32 - Two surfaces can have the same microinch roughness...Ch. 32 - What limits the resolution of a stylus-type...Ch. 32 - Prob. 6RQCh. 32 - Prob. 7RQCh. 32 - What are some common abrasive media used in...Ch. 32 - Prob. 9RQCh. 32 - Why might there be an optimum fill level in barrel...
Ch. 32 - Prob. 11RQCh. 32 - Prob. 12RQCh. 32 - Prob. 13RQCh. 32 - What are some of the mechanisms of alkaline...Ch. 32 - Prob. 15RQCh. 32 - In view of its many attractive features, why has...Ch. 32 - Prob. 17RQCh. 32 - Prob. 18RQCh. 32 - Prob. 19RQCh. 32 - What are some of the functions of a prime coat in...Ch. 32 - Prob. 21RQCh. 32 - Prob. 22RQCh. 32 - What are some of the attractive features of...Ch. 32 - Prob. 24RQCh. 32 - Prob. 25RQCh. 32 - Prob. 26RQCh. 32 - Prob. 27RQCh. 32 - What are the attractive properties of hard chrome...Ch. 32 - Prob. 29RQCh. 32 - Prob. 30RQCh. 32 - Prob. 31RQCh. 32 - When anodizing aluminum, what features determine...Ch. 32 - Prob. 33RQCh. 32 - Prob. 34RQCh. 32 - What types of particulate composites can be...Ch. 32 - Prob. 36RQCh. 32 - Prob. 37RQCh. 32 - How and why are burrs made by the milling process?...Ch. 32 - Prob. 39RQCh. 32 - What are the effects of stress level, surface...Ch. 32 - What effect would abrupt surface changes, such as...Ch. 32 - Prob. 4CSCh. 32 - Prob. 5CS
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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
- Given your understanding of what initiates and controls failure in materials, which of the following will increase the failure strength or lifetime of a test piece or component and why? a. Increasing the grain size so there are less grain boundaries to initiate failure b. Decreasing the temperature below the brittle-ductile transition temperature, to make it harder c. Decreasing the difference between the maximum and minimum stress values, as this effects the stress concentration factor d. Polishing to reduce surface defects e. Increasing its volume, to give a larger cross sectional areaarrow_forwardWhat are ratchet lines, and how are they arranged with respect to the fatigue crack front and any clamshell marks that may also be present?arrow_forwardWhat exactly is stress testing, and how does it help?arrow_forward
- List three general categories of surface treatment that can increase fatigue life, and provide one example of a specific process for each category.arrow_forwardHow does point defect affects the property of a material?arrow_forwardIf the number of fatigue is smaller than the number of yield, would that be safe or not? and why? (In shaft) Prove this through explanation and calculationsPlease, I want a wonderful, correct and detailed reportarrow_forward
- I. List the importance of the impact test and limitations. II. Which material (i.e., C1045-CF, Cast Iron, AL7075-T6) was more ductile? Explain the effect of carbon content and finishing process on ductility. II. How did temperature affect the toughness of the specimens? IV. Based on these results, which material would be better to use for constructing an earthquake resistant structure? Explain. V. The following picture shows Charpy fracture surfaces of a material with different initial temperatures, after testing. Which of these figures, i.e., (a) to (e), is related to the lowest temperature? Explain. (d)arrow_forwardWhat are two differences between clamshell/beach markings and fatigue striations?arrow_forwardWhich metal often does not have a well-defined yield point and which procedure is suitable to yield its strength?arrow_forward
- How can we determine the deformation of an axially loaded member?arrow_forwardWhat is Residual Stress?arrow_forwardGiven that the 106-cycle fatigue limit is often approximately half of the tensile strength of a metal, it would appear to be good design practice to use a material with as high a tensile strength as possible to maximize fatigue resistance. What is the potential shortcoming of this approach?arrow_forward
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