The yield stresses (oy) have been measured using steel and aluminum specimens of various grain sizes, as follows: Material D (um) σν (MPa) Steel 60.5 160 136 128 Aluminum 11.1 235 100 223 (a) Determine the coefficients o and kỵ in the Hall- Petch for these two materials. (b) Determine the yield stress in each material for a grain size of d=26 um.

The yield stresses (oy) have been measured using steel and aluminum specimens of various grain sizes, as follows: Material D (um) σν (MPa) Steel 60.5 160 136 128 Aluminum 11.1 235 100 223 (a) Determine the coefficients o and kỵ in the Hall- Petch for these two materials. (b) Determine the yield stress in each material for a grain size of d=26 um.

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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Question

The yield stresses (oy) have been measured using steel and aluminum specimens of various grain sizes,
as follows:
Q.1
Material
D (um)
σν (MPa)
Steel
60.5
160
136
128
Aluminum
11.1
235
100
223
(a) Determine the coefficients oo and ky in the Hall- Petch for these two materials.
(b) Determine the yield stress in each material for a grain size of d326 um.

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