EBK MANUFACTURING ENGINEERING & TECHNOL
7th Edition
ISBN: 9780100793439
Author: KALPAKJIAN
Publisher: YUZU
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Chapter 1, Problem 41QTP
To determine
The ball of a ballpoint pen is
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In the appendices, the modulus of elasticity for silicon nitride is 304 GPa
(that of steel is 207 GPa). How much porosity could be present in the
round bar of silicon nitride such that it equals the reported value for steel?
If 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.
5.Fill in the blank with the following:
[grain boundary, dislocation, coarse, stronger]
A fine-grained material (one that has small grains) is harder and
that is
than one
-grained, because the former has a greater total
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area to impede
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Chapter 1 Solutions
EBK MANUFACTURING ENGINEERING & TECHNOL
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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- 4.48 Determine the ASTM grain-size number if 30 grains per square inch are measured at a mag- nification of 250X.arrow_forwardThe effect of temperature on the crystallization of a material is given below. Calculate the transformation rate (min-1) at 130°C . Round your result to 2 decimal place.arrow_forwardYou work as an engineer in a glass manufacturing plant. During that day's shift, you noticed that the defect in melting glass (Fig.1). What could be the reason for this ? (give three reasons). Which precations would you take to solve this problem ? Please write down three precations, and explain in detail ?arrow_forward
- b- An ASTM grain size determination is being made from a photomicrograph of a metal which has a magnification of 500X. What is the ASTM grain size number of the metal if there are 64 grains per square inch?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_forwardAssume that 16 grains per square inch are counted in a micrograph taken at 250X.What is the ASTM number for grain size?arrow_forward
- Strength of metals and their alloys increases as grain size decreases. Find out the amount of increase in strength if total area of grain boundaries doublesarrow_forwardFor an ASTM grain size of 5, approximately how many grains would there be per square inch (a) at a magnification of 100? N = i (b) without any magnification? N = i grains/in.² grains/in.²arrow_forwardThe following are methods used for grain size determination (Choose all that apply) Linear analysis ASTM method Point counting Intercept methodarrow_forward
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