2) Which of the following statement(s) is/are correct? i. In hot working, distorted grain structure produced by deformation are eliminated by formation of new grains. ii. Very large deformations are possible in hot- working because the recovery processes keep pace with the deformation. iii. In the subsequent stages of cold forming, flow stress values go on decreasing. i and iii Only ii and iii only

2) Which of the following statement(s) is/are correct? i. In hot working, distorted grain structure produced by deformation are eliminated by formation of new grains. ii. Very large deformations are possible in hot- working because the recovery processes keep pace with the deformation. iii. In the subsequent stages of cold forming, flow stress values go on decreasing. i and iii Only ii and iii only

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

See similar textbooks

Similar questions

A copper plate was cold rolled and according to metallographic examination "elongated grains" were not seen in rolling direction. How can you explain this
In the flow curve for pure aluminum, the strength coefficient = 175 MPa and strain-hardening exponent = 0.20. In a forming operation, the final true strain = 0.75. Determine a) the flow stress and b) average flow stress that the metal experienced.
What is period of deformation?
Whereas, if the coldworked radius is twenty mm, now what is the radius before being deformed if the ductility percent EL of a coldworked element Cu cylidrical specimen is twenty-five percent?
Please explain the differences between recovery and recrystallization processes
The tensile strength for cold-rolled magnesium alloy AZ31B plate is approximately 160 MPa for specimens tested either parallel or perpendicular to the rolling direction. When similarly oriented specimens are compressed, the yield strength is only 90 MPa. Why? (Hint: Consider the possible deformation mechanisms available in the magnesium alloy and any crystallographic texture that might exist in the wrought plate.)
In hot working of metals, the distorted grains are completely removed and fresh new grains are formed. Select one: True False
What is a consequence of strain hardening?
i. Describe the purpose of annealing. ii. Explain the effect of annealing to cold worked metal when the heating is done in range of recovery, recrystallization and grain growth stage. iii. Examine the changes in view of internal residual stress, strength, hardness and ductility.
Can the yield point of material be increased by strain hardening?
138) Which one is needed to produce perforated parts using casting technique?a) lower degreeb) high degreec) spadesd) runnere) feeder 139) what is the crystal structure of iron?a) Hexagonal tight-packed structureb) volume-centered cubicc) face-centered cubicd) simple cubice) Ortok141) How is the elastic modulus calculated?A) With the strain rate of strainB) The ratio of shear strength to deformationC) the ratio of strain to strainD) the ratio of tensile strength to strainE) by the ratio of yield strength
Seems to be Option E) is Right. But What formula we need to use? Please quick. 1) Determine the hardening exponent of the metal with 2/3 of the average yield stres. a 0. 383 B. 0.35 C.0.3 D.0.333 E. 0.5