Question
In: Mechanical Engineering
1. The yield strength and grain size of a metal are as follows  
1. The yield strength and grain size of a metal are as follows
σy d (mm)
220 MPa 4 x 10-2
285 MPa 1 x 10-3
a. Calculate σ0
b. Calculate ky
c. At what grain size is a strength of 350 MPa possible?
d. “If the grain size is continuously decreased then the strength can be continuously increased without any upper limit, to infinite strength” Do you think this statement is possible or impossible. Please explain.
Solutions
samet mamat answered 4 months agoRelated Solutions
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how does grain boundary area vary with ASTM grain size?
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In short sentence
. An experiment was performed on a certain metal to determine if the strength is a...
. An experiment was performed on a certain metal to determine if
the strength is a function of heating time (hours). Results based
on 20 metal sheets are given below. Use the simple linear
regression model.
∑X = 40
∑X2 = 200
∑Y = 80
∑Y2 = 1120
∑XY = 460
Find the estimated y intercept and slope and write the equation of
the least squares regression line. Estimate Y when X is equal to 3
hours. Also determine the...
. An experiment was performed on a certain metal to determine if the strength is a...
. An experiment was performed on a certain metal to determine if
the strength is a function of heating time (hours). Results based
on 25 metal sheets are given below. Use the simple linear
regression model. ∑X = 50 ∑X2 = 200 ∑Y = 75 ∑Y2 = 1600 ∑XY = 400
Find the estimated y intercept and slope. Write the equation of the
least squares regression line and explain the coefficients.
Estimate Y when X is equal to 4 hours....
a. An experiment was performed on a certain metal to determine if the strength is a...
a. An experiment was performed on a certain
metal to determine if the strength is a function of heating time
(hours). Results based on 25 metal sheets are given below. Use the
simple linear regression model.
∑X = 50
∑X2 = 200
∑Y = 75
∑Y2 = 1600
∑XY = 400
Find the estimated y intercept and slope. Write the equation of the
least squares regression line and explain the coefficients.
Estimate Y when X is equal to 4 hours....
Why with decreasing grain size there is decrease in impact transition temperature?
Why with decreasing grain size there is decrease in impact
transition temperature?
For a brass alloy, the tensile strength is 400 MPa, the yield strength is 315 MPa...
For a brass alloy, the tensile strength is 400 MPa, the yield
strength is 315 MPa and the modulus of elasticity is 100 GPa.
(a) What is the maximum load that may applied to the specimen
with a cross sectional area of 130 mm2 before it fractures?
(b) For the same cross sectional area, if the original length of
the specimen is 75 mm what will be the length of the specimen, when
a load of 13000 N is applied...
An experiment was performed on a certain metal to determine if the strength is a function...
An experiment was performed on a certain metal to determine if
the strength is a function of heating time (hours). Results based
on 25 metal sheets are given below. Use the simple linear
regression model.
∑X = 50
∑X2 = 200
∑Y = 75
∑Y2 = 1600
∑XY = 400
Find the estimated y intercept and slope. Write the equation of
the least squares regression line and explain the coefficients.
Estimate Y when X is equal to 4 hours. Also...
9. An experiment was performed on a certain metal to determine if the strength is a...
9. An experiment was performed on a certain metal to determine
if the strength is a function of heating time (hours). Results
based on 20 metal sheets are given below. Use the simple linear
regression model.
∑X = 40
∑X2 = 200
∑Y = 80
∑Y2 = 1120
∑XY = 388
Find the estimated y intercept and slope. Write the equation of
the least squares regression line and explain the coefficients.
Estimate Y when X is equal to 5 hours....
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