From the plot of yield strength versus (grain diameter)-1/2 for a 70 Cu-30 Zn cartridge brass, shown in Animated Figure 7.15 do thefollowing:(a) Determine the value of the constant o of Equation 7.7.MPa(b) Determine the value of the constant ky of Equation 7.7.iMPa-(mm) ¹/2(c) Predict the yield strength of this alloy when the average grain diameter is 9.0 × 10-³ mm.MPa Yield strength (MPa)2001501005088010-1Grain size, d (mm)10-²d-1/2 (mm-1/2)125 x 10-33016201010d=0d-¹ = 0Yield strength = 0Yield strength = 0Yield strength (ksi)

(a) Write the relationship between yield strength and grain diameter. σy=σ0+kyd1/2

Answered: From the plot of yield strength versus…

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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The lower yield point for a certain plain carbon steelbar is found to be 135 MPa, while a second bar of the samecomposition yields at 260 MPa. Metallographic analysisshows that the average grain diameter is 50μm in the firstbar and 8μm in the second bar.a. Predict the grain diameter needed to cause a loweryield point of 205 MPa.b. If the steel could be fabricated to form a stablegrain structure of 500 nm grains, what strengthwould be predicted?c. Why might you expect the upper yield point to bemore alike in the first two bars than the lower yieldpoint?
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