Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Textbook Question
Chapter 1, Problem 42QTP
How many grains are there on the surface of the head of a pin? Assume that the head of a pin is spherical with a 1-mm diameter and has an ASTM grain size of 12.
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Chapter 1 Solutions
Manufacturing Engineering & Technology
Ch. 1 - What is the difference between an atom and a...Ch. 1 - Prob. 2RQCh. 1 - Prob. 3RQCh. 1 - Prob. 4RQCh. 1 - Define anisotropy. What is its significance?Ch. 1 - What effects does recrystallization have on the...Ch. 1 - What is strain hardening, and what effects does it...Ch. 1 - Explain what is meant by structure-sensitive and...Ch. 1 - Prob. 9RQCh. 1 - What influence does grain size have on the...
Ch. 1 - What is the relationship between the nucleation...Ch. 1 - What is a slip system, and what is its...Ch. 1 - Explain the difference between recovery and...Ch. 1 - What is hot shortness, and what is its...Ch. 1 - Explain the advantages and limitations of cold,...Ch. 1 - Describe what the orange peel effect is. Explain...Ch. 1 - Some metals, such as lead, do not become stronger...Ch. 1 - Describe the difference between preferred...Ch. 1 - Differentiate between stress relaxation and stress...Ch. 1 - What is twinning? How does it differ from slip?Ch. 1 - Prob. 21QLPCh. 1 - What is the significance of the fact that some...Ch. 1 - Is it possible for two pieces of the same metal to...Ch. 1 - Prob. 24QLPCh. 1 - A cold-worked piece of metal has been...Ch. 1 - What materials and structures can you think of...Ch. 1 - Two parts have been made of the same material, but...Ch. 1 - Do you think it might be important to know whether...Ch. 1 - Explain why the strength of a polycrystalline...Ch. 1 - Describe the technique you would use to reduce the...Ch. 1 - What is the significance of the fact that such...Ch. 1 - Prob. 32QLPCh. 1 - It has been noted that the more a metal has been...Ch. 1 - Is it possible to cold work a metal at...Ch. 1 - Comment on your observations regarding Fig. 1.14.Ch. 1 - Is it possible for a metal to be completely...Ch. 1 - Prob. 37QTPCh. 1 - Prob. 38QTPCh. 1 - Plot the data given in Table 1.1 in terms of...Ch. 1 - A strip of metal is reduced from 30 mm in...Ch. 1 - Prob. 41QTPCh. 1 - How many grains are there on the surface of the...Ch. 1 - Prob. 43QTPCh. 1 - Prob. 44QTPCh. 1 - Prob. 45QTPCh. 1 - A technician determines that the grain size of a...Ch. 1 - If the diameter of the aluminum atom is 0.28 nm,...Ch. 1 - The following data are obtained in tension tests...Ch. 1 - Prob. 50QTPCh. 1 - Prob. 51QTPCh. 1 - Prob. 52QTPCh. 1 - Same as Prob. 1.39, but ASTM no. versus...Ch. 1 - By stretching a thin strip of polished metal, as...Ch. 1 - Draw some analogies to mechanical fiberingfor...Ch. 1 - Draw some analogies to the phenomenon of hot...Ch. 1 - Take a deck of playing cards, place a rubber band...Ch. 1 - Give examples in which anisotropy is scale...Ch. 1 - The movement of an edge dislocation was described...
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- The ASTM grain size for a metal was 3. Determine the number of grains at a section from its surface with an area of 1 in? at magnification of 1x (life size)? Answer:arrow_forwardSamples 1 and 2 are identical except for the grain size. Which sample has the smaller grains (clearly mention 1 or 2)?arrow_forwardIn an measurement with 100× magnification factor on metal specimen, 65 grains per square inch are observed. Determine the ASTM grain size number of the specimen.arrow_forward
- 4.48 Determine the ASTM grain-size number if 30 grains per square inch are measured at a mag- nification of 250X.arrow_forwardDetermine the ASTM grain size number of a metal specimen if 25 grains per square inch are measured at a magnification of 100x Solution please. Thankyouarrow_forwardBriefly explain the ASTM grain-size standardarrow_forward
- For an ASTM grain size of 6, approximately how many grains would there be per square inch under each of the following conditions? (i) At a magnification of 100X (ii) Without any magnificationarrow_forwardThe diagram below shows a microscopic metal rod with a single crystal structure whose orientation is indicated by the inset. A force of F = 15.7 N is applied to the rod. The cross-sectional area is 1.3 mm2. Calculate the shear stress along the close-packed direction.arrow_forwardIf 32 grains per square inch are measured at a magnification of 800x in a hypothetical metal's micrograph, Determine the ASTM grain size number. Round-off to the nearest whole number. How many grains would there be per square inch if the magnification is 200x? Round-off to the nearest whole number.arrow_forward
- In hot working of metals, the distorted grains are completely removed and fresh new grains are formed. Select one: True Falsearrow_forwarddiscuss the thermal conductivity of grains, including the different methods of measurement and their applications.arrow_forward9. Consider a metal rod, whose grain size can be adjusted by different processing techniques. The graph below shows how the yield stress changes with grain size d; the x-axis is logarithmic. The curve reaches a limiting value of 60 MPa as indicated by the horizontal dashed line on the y-axis, for very large grain sizes. Also, you are given the information that at d = 25 microns (vertical dashed line), the yield stress is 100 MPa. Using this information, what will be the yield stress at d = 5 microns? Select the closest numerical value. Use the Hall-Petch relation in working out your answer. Yield stress (MPa) ● ● 228882S 130 120 110 100 60 10⁰ 10¹ 10² Grain size d (microns) 132.4 MPa 149.4 MPa 165.2 MPa 156.3 MPa 10arrow_forward
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