1-In hot forming processes, the strain rate is important since deformation resistanceof w.p. increases as is increased.******2-The coating of interior surfaces of casting molds can aid.......3- Based on nature of use, the cores can be classified into: 1. and 2...... and4-In centrifugal casting, fine grain microstructure (resisting to corrosion, bettermechanical properties) castings can be obtained because of......5-During manufacturing processes, the residual stresses can be arising due to threemajor reasons: 1......, 2...... and 3......6- The wheels, pulleys and flywheels can be manufacturing by...... casting.7- The ...... of casting molds can help removing impurities and facilitating metalflow inside the molds.8-In horizontal true centrifugal casting, a tubular products having uniform wallthickness can be obtained when...... is greater than ......

In hot forming processes, the strain rate is the rate at which the deformation of a material occurs.…

Answered: 1-In hot forming processes, the strain…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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: A horizontal true centrifugal casting process is used to make aluminum rings with the following dimensions: length=5 cm, outside diameter 65 cm, and inside diameter = 60 cm. (a) Determine the rotational speed that will provide a G- factor = 60. (b) centrifugal force per square meter (Pa) on the mold wall. %3D
4) List the passageway (gating system) elements in sand casting moulds and show them with drawing? Draw the stress-strain curve and gives the stress and strain equations for both Engineering and True stress-strain
(9,00 Puanlar) A riser in the shape of a sphere is to be designed for a sand casting mold. The casting is a rectangular plate, with 8- length 50 cm, width = 35 cm, and thickness = 4 cm. If the total solidification time of the casting itself is known to be 7,5 min, determine the diameter of the riser so that it will take 30% longer for the riser to solidify. %3D Riser volume: V3(TD3)/6(D%3Ddiameter) Riser area: A=TD2 Casting volume: V-L-Wt (L-Length, W=width, t-thickness) a) 8,41 cm b) O 7,34 cm c) 6.62 cm 11,46 cm Boş bırak KÖnceki 8/43 Sonraki> Каpat
QUESTIONS 1- Describe with net sketch: a. Pattern b. Riser c. Runners d. Core 2- Compare between open mold and closed mold. 3-Explain the main Procedures of Sand Casting. 4 - What are the important properties which are essential in good molding sand? Explain in details. 5- Mention advantages and disadvantages of casting. 6- Describe types of sand mold. 7- What are the common binders of sand mold and cores? 8- Describe Desirable Mold Properties. 9- Explain two types of patterns and two pattern allowances 10- Describe with sketches shell process casting (i) Composition of sand mixture (ii) Steps in molding (iii) Advantages (iv) Limitations and (v) Applications 11- Explain with Sketch the construction and operation of a hot chamber die casting machine. 12- Compare between hot chamber die casting and hot chamber die casting. 13- What is meant of investment casting? What are the main materials used for making the investment pattern. 14- Describe various kinds of patterns in use. 15- Why…
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…
EX.3//A cylindrical riser must be designed for a sand-casting mold. The casting itself is a steel rectangular plate with dimensions 7.5 cm x 12.5 cm x 2.0 cm. Previous observations have indicated that the total solidification time (TTs) for this casting =1.6 min. The cylinder for the riser will have a diameter-to-height ratio=1.0. Determine the dimensions of the riser so that its TTS = 2.0 min.
Please show all of your work, thank you!
Only answer question 4
2. What are the general defects found in casting processes? Name and briefly describe two.
In turbine blade casting, how is a single-crystal structure achieved? Select one or more: a. By using a curving coil-like channel in the casting mould b. By removing grain boundaries by hot working and recrystallisation c. By careful control of the temperatures of the mould d. By introducing impurities into the molten alloy in the mould
i need the answer quickly
3) What are the means of elastic and plastic deformations? List the passageway (gating system) elements in sand casting moulds and show them with drawing?

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