نقطة واحدة .The strength constant (C) is increased with increasing of temperature True False The metal is becoming weaker as strain increases, this is because of .strain hardening (work hardening) property نقطة واحدة True O False O

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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At higher temperature, strength and strain hardening are increased,
whereas, ductility is decreased which permits greater plastic
.deformation
True O
False O
.The strength constant (C) is increased with increasing of temperature
True O
False O
The metal is becoming weaker as strain increases, this is because of
.strain hardening (work hardening) property
نقطة واحدة
True O
False O
The engineering stress and strain are defined relative to the
.instantaneous area and length of test specimen
True O
False
aaly ihi
In sheetmetal working processes, the surface area-to-volume ratio of
.w.p. is low
True O
False
ialy ihii Determine the value of the strain-hardening exponent for a metal that will
cause the average flow stress to be 70% of the final flow stress after
.deformation
0.444
0.421
0.422
0.428
aals i
For pure copper (annealed), the strength coefficient = 330 MPa and
strain-hardening exponent = 0.52 in the flow curve equation. Determine
the average flow stress that the metal experiences if it is subjected to a
stress that is equal to its strength coefficient K
MPа 222
MPa 214
MPa 220
MPa 217
Average Flow
=Stress
Transcribed Image Text:At higher temperature, strength and strain hardening are increased, whereas, ductility is decreased which permits greater plastic .deformation True O False O .The strength constant (C) is increased with increasing of temperature True O False O The metal is becoming weaker as strain increases, this is because of .strain hardening (work hardening) property نقطة واحدة True O False O The engineering stress and strain are defined relative to the .instantaneous area and length of test specimen True O False aaly ihi In sheetmetal working processes, the surface area-to-volume ratio of .w.p. is low True O False ialy ihii Determine the value of the strain-hardening exponent for a metal that will cause the average flow stress to be 70% of the final flow stress after .deformation 0.444 0.421 0.422 0.428 aals i For pure copper (annealed), the strength coefficient = 330 MPa and strain-hardening exponent = 0.52 in the flow curve equation. Determine the average flow stress that the metal experiences if it is subjected to a stress that is equal to its strength coefficient K MPа 222 MPa 214 MPa 220 MPa 217 Average Flow =Stress
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