Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Chapter 6, Problem 7RQ
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What are metallic glasses? Why is the word “glass” used for these materials?
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How different of the properties of BCC vs FCC? Discuss mechanical, electrical, thermal properties.
1. Is there a difference in packing (coordination number) between these two types (FCC and HCP) of structures?
2. Look at the two structures. A small difference in arrangement of atoms causes a dramatic difference in the properties of FCC ductile metals and HCP brittle metals. Can you see it? Try to draw the differences (You can draw the 3-layers separately):
What is "Tin Disease"? The crystal Structure of Zinc (Zn) is Hexagonal Closed Packed
(HCP). Show that for HCP structure c/a ratio is 1.633 with necessary neat sketches.
Chapter 6 Solutions
Manufacturing Engineering & Technology
Ch. 6 - Given the abundance of aluminum in the Earths...Ch. 6 - Prob. 2RQCh. 6 - What are the major uses of copper? What arc the...Ch. 6 - What are superalloys? Why are they so named?Ch. 6 - What properties of titanium make it attractive for...Ch. 6 - Which properties of each of the major refractory...Ch. 6 - Prob. 7RQCh. 6 - What it the composition of (a) babbitts, (b)...Ch. 6 - Name the materials described in this chapter that...Ch. 6 - What are the major uses of gold and silver, other...
Ch. 6 - Describe the advantages to using zinc as a coating...Ch. 6 - Prob. 12RQCh. 6 - Why are aircraft fuselages made of aluminum...Ch. 6 - How is metal foam produced?Ch. 6 - What metals have the lowest melting points? What...Ch. 6 - Explain why cooking utensils generally are made of...Ch. 6 - Would it be advantageous to plot the data in Table...Ch. 6 - Compare the contents of Table 6.3 with those in...Ch. 6 - What factors other than mechanical strength should...Ch. 6 - Prob. 20QLPCh. 6 - If aircraft, such as a Boeing 757, are made of 79%...Ch. 6 - Prob. 22QLPCh. 6 - Most household wiring is made of copper wire. By...Ch. 6 - The example in this chapter showed the benefits of...Ch. 6 - If tungsten is the highest melting-point metal,...Ch. 6 - A simply supported rectangular beam is 25 mm wide...Ch. 6 - Obtain a few aluminum beverage cans, cut them, and...Ch. 6 - Beverage cans usually are stacked on top of each...Ch. 6 - Using strength and density data, determine the...Ch. 6 - Plot the following for the materials described in...Ch. 6 - Prob. 33SDPCh. 6 - Give some applications for (a) amorphous metals,...Ch. 6 - Describe the advantages of making products with...Ch. 6 - In the text, magnesium was described as the...Ch. 6 - Prob. 38SDPCh. 6 - Review the technical literature, and write a...
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- Suppose we introduce one carbon atom for every 100 iron atoms in an interstitial position in BCC iron, giving a lattice parameter of 0.2867 nm. For this steel, find the density and the packing factorarrow_forward1. Why does a metal generally have a higher electrical conductivity than a ceramic? 2. Give 2 reasons why fluorine has the highest electronegativity of any element. 3. Why does ice have a lower density than liquid water? 4. Why do FCC and HCP have identical atomic packing factors (0.74) if they have different crystal structures? 5. Why are Pearson symbols not sufficient to precisely describe all crystal structures?arrow_forwardHow can we calculate structure factor for "tetragonal, hexagonal and orthorhombic"?arrow_forward
- The crystalline density of polypropyleneis 0.946 g>cm3, and its amorphous densityis 0.855 g>cm3. What is the weight percentof the structure that is crystalline ina polypropylene that has a density of0.9 g>cm3?arrow_forwardQuestion-5 How many atoms per unit cell are there in the HCP crystal structure (give details)? What is the coordination number for the atoms in the HCP crystal structure?arrow_forwardWhat is packing factor at the atomic level? What is the worth of its face-centered cubic crystal?arrow_forward
- Answer part carrow_forwardWe need a material that is optically transparent but electrically conductive. Such materials are used fortouch screen displays. What kind of materials can be used for this application? (Hint: Think about coatingsof materials that can provide electronic or ionic conductivity; the substrate has to be transparent for thisapplication.)arrow_forwardwhat microstructure is this ASTM A128 materialarrow_forward
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