Degarmo's Materials And Processes In Manufacturing
13th Edition
ISBN: 9781119492825
Author: Black, J. Temple, Kohser, Ronald A., Author.
Publisher: Wiley,
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Chapter 16, Problem 1P
To determine
The characteristics of starting powder for the success of powder metallurgy and the similarity and differences between these characteristics and casting and forming process.
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Manufacturing Processes
A flat plate is to be cast in an open mold whose bottom has a square shape of 12.5 cm by 12.5 cm. The
mold is 7.0 cm deep. A total of 350 cm³ of molten aluminum is poured into the mold. Solidification
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lists the linear shrinkage due to thermal contraction after solidification. If the availability of molten
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solidification is completed, determine the final dimensions (width and height) of the plate.
A riser in the shape of a sphere is to be designed for a sand casting mold. The casting is a rectangular plate,
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itself is known to be 2.5 min, determine the diameter of the riser so that it will take 20% longer for the riser
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Chapter 16 Solutions
Degarmo's Materials And Processes In Manufacturing
Ch. 16 - What type of product would be considered to be a...Ch. 16 - What were some of the earliest powder metallurgy...Ch. 16 - Prob. 3RQCh. 16 - Why might the term particulate processing be a...Ch. 16 - What are some of the primary market areas for P/M...Ch. 16 - Prob. 6RQCh. 16 - What are the four basic steps that are usually...Ch. 16 - Prob. 8RQCh. 16 - Prob. 9RQCh. 16 - Prob. 10RQ
Ch. 16 - Which of the powder manufacturing processes are...Ch. 16 - Why might the powdered material be heat�treated...Ch. 16 - Prob. 13RQCh. 16 - Prob. 14RQCh. 16 - Prob. 15RQCh. 16 - Prob. 16RQCh. 16 - Prob. 17RQCh. 16 - Prob. 18RQCh. 16 - Prob. 19RQCh. 16 - Prob. 20RQCh. 16 - Prob. 21RQCh. 16 - What is the benefit of a removable die set in a...Ch. 16 - What limits the cross�sectional area of most P/M...Ch. 16 - Prob. 24RQCh. 16 - Prob. 25RQCh. 16 - Prob. 26RQCh. 16 - Prob. 27RQCh. 16 - Prob. 28RQCh. 16 - Prob. 29RQCh. 16 - Prob. 30RQCh. 16 - Prob. 31RQCh. 16 - Prob. 32RQCh. 16 - Prob. 33RQCh. 16 - Prob. 34RQCh. 16 - Prob. 35RQCh. 16 - What types of atmospheres are used during...Ch. 16 - Prob. 37RQCh. 16 - What is the purpose of the sinter brazing process?Ch. 16 - Prob. 39RQCh. 16 - Prob. 40RQCh. 16 - Prob. 41RQCh. 16 - Prob. 42RQCh. 16 - Prob. 43RQCh. 16 - What is canning and decanning, and how do these...Ch. 16 - Prob. 45RQCh. 16 - Prob. 46RQCh. 16 - Prob. 47RQCh. 16 - Prob. 48RQCh. 16 - Prob. 49RQCh. 16 - Prob. 50RQCh. 16 - How is the metal powder used in metal injection...Ch. 16 - Prob. 52RQCh. 16 - Prob. 53RQCh. 16 - Prob. 54RQCh. 16 - Prob. 55RQCh. 16 - Prob. 56RQCh. 16 - Prob. 57RQCh. 16 - Prob. 58RQCh. 16 - Prob. 59RQCh. 16 - Prob. 60RQCh. 16 - Prob. 61RQCh. 16 - Prob. 62RQCh. 16 - Prob. 63RQCh. 16 - Prob. 64RQCh. 16 - Prob. 65RQCh. 16 - Prob. 66RQCh. 16 - Prob. 67RQCh. 16 - Give an example of a product where two or more...Ch. 16 - What are the primary assets or advantages of the...Ch. 16 - Prob. 70RQCh. 16 - Prob. 71RQCh. 16 - Prob. 72RQCh. 16 - Prob. 73RQCh. 16 - Prob. 74RQCh. 16 - Prob. 75RQCh. 16 - Prob. 76RQCh. 16 - Prob. 1PCh. 16 - Prob. 2PCh. 16 - Prob. 3PCh. 16 - Prob. 4PCh. 16 - Prob. 5PCh. 16 - Particulate materials can be made by a variety of...Ch. 16 - Prob. 7PCh. 16 - Briefly discuss the properties and characteristics...Ch. 16 - Based on the size, shape, and reasonable precision...Ch. 16 - Prob. 1.8CSCh. 16 - Prob. 1.9CSCh. 16 - Prob. 1.10CSCh. 16 - Prob. 2.1CSCh. 16 - Prob. 2.3CS
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- Which of these factors causes more porosity to form toward the interior of a casting rather than toward the outside? (a) Gasses are less soluble in the solid metal than the liquid, so solidified areas push dissolved gasses toward the interior. (b) Casting under a vacuum causes gasses near the liquid metal surface to be drawn out of the liquid during solidification. (c) The feeding structures of the mold are designed to force entrapped air into the center of the casting. (d) Draft on the mold wall forces air bubbles toward the interior of the solidifying metal. (e) None of the above Non-eutectic alloys (most commercial alloys) solidify over a temperature range. Which of the following statements explains how this affects the casting process. (a) Solidified non-eutectic alloys are especially difficult to remove from metal dies (b) Non-eutectic alloys have significantly less fluidity than pure metals or eutectic alloys. (c) Non-eutectic alloys solidify starting from the outside of the…arrow_forwardParvinbhaiarrow_forward12.Silica sand has which one of the following compositions: (a) A12O3, (b) SiO, (c) SiO2, or (d) SISO4? 13.A misrun is which one of the following defects in casting: (a) globules of metal becoming entrapped in the casting, (b) metal is not properly poured into the downsprue, (c) metal solidifies before filling the cavity, (d) microporosity, and (e) "pipe" formation?arrow_forward
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- Describe the stages involved in the contraction of metals during casting.(a) Contraction of the molten metals as it cools prior to its solidification.(b) Contraction of the metal during phase change from liquid to solid.(c) Contraction of the solidified metals as its temperature drops to ambient temperature.(d) All of above.(e) None of above.2. What kinds of defects in castings?(a) Hot tear.(b) Surface scar.(c) Plastic deformation.(d) Ductile flow.3. How does porosity have detrimental effects on the mechanical and physical properties ofcastings?(a) Pores in castings are resulted from internal discontinuities when that are prone topropagate under external stresses.(b) The toughness of a material will decrease as a result of porosity.(c) Physical properties, such as thermal and electrical conductivity, also be adverselyaffected by porosity.(d) Pores increase the strength and elastic modulus.(e) Porosity increases both the thermal and electrical conductivity4. Thermosetting plastics can…arrow_forward3. (Slow or Fast, which one? – Circle one) cooling rates results in coarse dendritic structures. 4. The higher the viscosity of the melt, the . its fluidity? 5. Name 3 defects in casting: 6. Internal or external are an effective means of reducing shrinkage porosity during solidification. 7. Is green-sand molding expensive? 8. .... are inserts placed in the molds to form the hollow regions in casting. 9. The method of casting turbine blades: Sample A 10. Which one has higher stiffness? Sample A or Sample B Sample B 11. Which one has higher toughness? Sample A or Sample B 12. Which one has higher strength? Sample A or Sample B 13. Which one has higher ductility? Sample A or Sample 14. Higher ......... means more rigidity. Strain 15. Before the no-slip point, the velocity is (higher or lower, which one? - Circle one) 16. In flat-rolling process, using smaller diameter rolls (increases or decreases, which one? - Circle one) the roll force. 17. Balls for ball bearings can be made by rolling…arrow_forwardProblem 1 Suppose we want to cast a magnesium bar 20x20x45 mm³. We are to use a mid gating (exactly at the parting line) system with two runners and multiple ingates (no bends in runner), a top riser of 1:1.2 (D:H) ratio, and the bar lying down. The pouring cup to be used has a height of 10 mm. What would be the riser dimensions for this casting? Use the JB Caine Method (a, b, c = 0.10, 0.06, 1.08). If the choke area is 20 mm?, how long would the pouring time be?arrow_forward
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