Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Textbook Question
Chapter 17, Problem 36QTP
Estimate the number of particles in a 500-g sample of iron powder if the particle size is 50 μm.
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3
Granule strength is very important in pressing powders.
The force applied to a granule with a radius of 1 mm is 0.5 Newton. Calculate the breaking
strength of the granule.
b) It is observed that the pressed granules break easily during pressing. Write down the reasons
of this situation and what would you take precations to solve this problem? Why? (please write
down 3 precautions with reasons).
odluck
For a powder binding process that mixes a 1:2 volume ratio mixture of semi-crystalline polyethylene powder with a density of 0.900 g/cm³ and
crystalline polyethylene powder, what is the percent crystallinity of the manufactured parts? (The density of polyethylene in its amorphous and
crystalline states is 0.870 g/cm³ and 0.998 g/cm³ respectively)
(This question has only one correct answer)
О а.
% Crystallinity = 55.45%
O .
% Crystallinity = 57.25%
О с.
% Crystallinity = 76.99%
Od.
% Crystallinity = 82.30%
% Crystallinity = 65.50%
Chapter 17 Solutions
Manufacturing Engineering & Technology
Ch. 17 - Describe briefly the production steps involved in...Ch. 17 - Name the various methods of powder production and...Ch. 17 - Explain why metal powders may be blended.Ch. 17 - Describe the methods used in metal powder...Ch. 17 - What is isostatic pressing? How is it different...Ch. 17 - What hazards are involved in PM processing?...Ch. 17 - Describe what occurs to metal powders during...Ch. 17 - Prob. 8RQCh. 17 - Why might secondary and finishing operations be...Ch. 17 - Prob. 10RQ
Ch. 17 - Prob. 11RQCh. 17 - Prob. 12RQCh. 17 - Prob. 13RQCh. 17 - What is screening of metal powders? Why is it...Ch. 17 - Why are protective atmospheres necessary in...Ch. 17 - Why is there density variation in the compacting...Ch. 17 - What is the magnitude of the stresses and forces...Ch. 17 - List the similarities and differences of forging...Ch. 17 - Give some reasons that powder-injection molding is...Ch. 17 - How does the equipment used for powder compaction...Ch. 17 - Explain why the mechanical and physical properties...Ch. 17 - What are the effects of the different shapes and...Ch. 17 - Describe the relative advantages and limitations...Ch. 17 - How different, if any, are the requirements for...Ch. 17 - The powder metallurgy process can be competitive...Ch. 17 - What are the reasons for the shapes of the shown...Ch. 17 - Should green compacts be brought up to the...Ch. 17 - Because they undergo special processing, metal...Ch. 17 - In Fig. 17.12, it can be seen that the pressure is...Ch. 17 - Why do the compacting pressure and the sintering...Ch. 17 - What will be stronger: a blend of stainless steel...Ch. 17 - Name the various methods of powder production and...Ch. 17 - Estimate the maximum tonnage required to compact a...Ch. 17 - Refer to Fig. 17.11a. What should be the volume of...Ch. 17 - Determine the shape factors for (a) a cylinder...Ch. 17 - Estimate the number of particles in a 500-g sample...Ch. 17 - Prob. 37QTPCh. 17 - A coarse copper powder is compacted in a...Ch. 17 - A gear is to be manufactured from iron powders. It...Ch. 17 - What volume of powder is needed to make the gear...Ch. 17 - The axisymmetric part shown in Fig. P17.41 is to...Ch. 17 - Prepare an illustration similar to Fig. 13.1,...Ch. 17 - Prob. 44SDPCh. 17 - Compare the design considerations for PM products...Ch. 17 - Prob. 46SDPCh. 17 - Prob. 47SDPCh. 17 - Using the Internet, locate suppliers of metal...Ch. 17 - Explain why powder metal parts are commonly used...Ch. 17 - Prob. 50SDPCh. 17 - Describe how the information given in Fig. 17.15...Ch. 17 - It was stated that, in the process shown in Fig....Ch. 17 - Prob. 53SDPCh. 17 - The axisymmetric parts shown in Fig. P17.54 are to...Ch. 17 - Assume you are working in technical sales. What...
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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
- For a powder binding process that mixes a 1:2 volume ratio mixture of semi-crystalline polyethylene powder with a density of 0.900 g/cm³ and crystalline polyethylene powder, what is the percent crystallinity of the manufactured parts? (The density of polyethylene in its amorphous and crystalline states is 0.870 g/cm3 and 0.998 g/cm3 respectively) (This question has only one correct answer) O a. % Crystallinity = 65.50% O b. % Crystallinity = 57.25% С. % Crystallinity = 82.30% O d. % Crystallinity = 76.99% е. % Crystallinity = 55.45%arrow_forwardFor a powder binding process that mixes a 1:2 volume ratio mixture of semi-crystalline polyethylene powder with a density of 0.900 g/cm3 andcrystalline polyethylene powder, what is the percent crystallinity of the manufactured parts? (The density of polyethylene in its amorphous andcrystalline states is 0.870 g/cm3 and 0.998 g/cm3 respectively)(This question has only one correct answer)% Crystallinity = 55.45%% Crystallinity = 65.50%% Crystallinity = 76.99%% Crystallinity = 82.30%% Crystallinity = 57.25%arrow_forwardFor a powder binding process that mixes a 3:1 volume ratio mixture of semi-crystalline polyethylene powder with a density of 0.900 g/cm³ and crystalline polyethylene powder, what is the percent crystallinity of the manufactured parts? (The density of polyethylene in its amorphous and crystalline states is 0.870 g/cm³ and 0.998 g/cm³ respectively)arrow_forward
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- A Silicon Carbide powder has an internal energy of 3 X 108 J/m³, a surface tension of 1.2 J/m², and a total energy of 2.6 X 10-¹5 J. What is the smallest diameter that this powder may be ground without agglomerating? (show your work)arrow_forwardFor a powder binding process that mixes a 3:1 volume ratio mixture of semi-crystalline polyethylene powder with a density of 0.900 g/cm³ and crystalline polyethylene powder, what is the percent crystallinity of the manufactured parts? (The density of polyethylene in its amorphous and crystalline states is 0.870 g/cm³ and 0.998 g/cm³ respectively) O a. % Crystallinity = 45.96% O b. % Crystallinity=55.25% O c. % Crystallinity = 53.35% O d. % Crystallinity = 61.20% Oe. % Crystallinity = 35.50%arrow_forwardA pile of iron powder weighs 0.9 kg. The particles are spherical in shape and all have the same diameter of 0.005 cm. (a) Determine the total surface area of all the particles in the pile. (b) If the packing factor = 0.6, determine the volume taken by the pile. Note: the density of iron = 8 g/cm3.arrow_forward
- For a powder binding process that mixes a 3:1 volume ratio mixture of semi-crystalline polyethylene powder with a density of 0.900 g/cm³ and crystalline polyethylene powder, what is the percent crystallinity of the manufactured parts? (The density of polyethylene in its amorphous and crystalline states is 0.870 g/cm³ and 0.998 g/cm³ respectively) % Crystallinity = 45.96% O b. % Crystallinity = 35.50% % Crystallinity = 61.20% O d. % Crystallinity = 55.25% O e. % Crystallinity = 53.35% a. C.arrow_forwardDiscuss the effect of monomodal and bimodal particle size distribution of powderson the microstructure and properties of advanced ceramics. Which starting powders would youprefer and WHY?arrow_forwardGKN Sinter Metals Company pressed iron powders using a compaction pressure of 600 MPa to produced a cylindrical bearing which is 70 cm long and has internal and external diameters of 8 cm and 16 cm, respectively. Determine (a) the most appropriate pressing direction, (b) the required press tonnage to perform this operation, and (c) the final weight of the part if the porosity is 12%, given that the density of iron, ρ = 7.87 g/cm3. Assume shrinkage during sintering can be neglectedarrow_forward
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