You are given three metal test samples, with the same chemical composition and differing grain sizes: A: 5.0, B: 10.0 and C: 20.0 microns. Samples A and B have been tested and have yield stresses of 142.4 MPa and 135.8 MPa (all numbers are rounded off to the 1st decimal point). Based on this information, which of the following values do you think will be the closest to the yield stress of Sample C? In calculating the answer, use the Hall-Petch relation between yield stress of a metal o vield and the grain size of the metal d, which is O yield = 00 + kd¬\/2 where k and og are constants. (This question has only one correct answer) O a. 100.6 MPa O b. 131.1 MPa c. 152.4 MPa d. 115.8 MPa O e. 128.1 MPa

You are given three metal test samples, with the same chemical composition and differing grain sizes: A: 5.0, B: 10.0 and C: 20.0 microns. Samples A and B have been tested and have yield stresses of 142.4 MPa and 135.8 MPa (all numbers are rounded off to the 1st decimal point). Based on this information, which of the following values do you think will be the closest to the yield stress of Sample C? In calculating the answer, use the Hall-Petch relation between yield stress of a metal o vield and the grain size of the metal d, which is O yield = 00 + kd¬\/2 where k and og are constants. (This question has only one correct answer) O a. 100.6 MPa O b. 131.1 MPa c. 152.4 MPa d. 115.8 MPa O e. 128.1 MPa

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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Concept explainers

Solidification of metals

The term solidification indicates the conversion of material from the state of liquid to the state of solid. The solid-state is more compact and rigid than liquid, and the solidification indicates the transformation of material from a random state to a more compact and crystalline form. The point at which dendrite formation in liquid starts taking place is referred to as the solidification point.

Question

You are given three metal test samples, with the same chemical composition and differing grain sizes: A: 5.0, B: 10.0 and C: 20.0
microns. Samples A and B have been tested and have yield stresses of 142.4 MPa and 135.8 MPa (all numbers are rounded off to
the 1st decimal point). Based on this information, which of the following values do you think will be the closest to the yield stress
of Sample C?
In calculating the answer, use the Hall-Petch relation between yield stress of a metal o vield and the grain size of the metal d, which
is
Oyield = 00 + kd¬1/2
where k and og are constants.
(This question has only one correct answer)
а.
100.6 MPa
b.
131.1 MPa
С.
152.4 MPa
O d.
115.8 MPa
е.
128.1 MPa

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