The yield strength of a material follows Hall-Petch relation. It was reported that the yield strength...
The yield strength of a material follows Hall-Petch relation. It was reported that the yield strength of the material is 100 MPa when grain size is 1 mm and 80 MPa when grain size is 3 mm. Calculate the yield strength of the material when grain size is 5 mm.
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The yield strength of a material follows Hall-Petch relation. It
was reported that the yield strength...
The tensile strength of polycrystalline spinel can be approximated using the Hall-Petch relation. If the spinel...
The tensile strength of polycrystalline spinel can be approximated using the Hall-Petch relation. If the spinel has a grain size of 5 um, its tensile strength is 200 GPa. For a grain size of 200 pm, the tensile strength decreases to 170 GPa. (a) Determine the Hall-Petch constants. (4 points) (b) Determine the tensile strength if the grain size increases to 250 um. Explain your answer. (4 points)
o adjacent and parallel planes of atoms(Gie. The magnitude of the distance between two adjacent and...
o adjacent and parallel planes of atoms(Gie. The magnitude of the distance between two adjacent and parn lanar spacing dhkl, is a function of the Miller indices and the interp crystal whose lattice parameter is a (unit cell edge length), the relation araters e relation is as follows: ( For BCC iron compute the interplanar spacing for the (220) set of planes (i) Compute the diffraction angle for the (220) set of planes using Brag's low Given for BCC iron:...
The yield strength ơy of low-carbon steel is moderately dependent on the grain size D, and...
The yield strength ơy of low-carbon steel is moderately dependent on the grain size D, and the relation can be described by the equation: where σ, and k are material constants. The yield strength is 322 MPa for a grain size of 180 um and 363 MPa for a grain size of 22 um. (a) Calculate the yield strength of the steel for a grain size of 11 um. (b) Explain briefly the physical significance of the constant ơ0.
The yield strength for an alloy that has an average grain diameter of 5.7 × 10-2...
The yield strength for an alloy that has an average grain
diameter of 5.7 × 10-2 mm is 140 MPa. At a
grain diameter of 7.3 × 10-3 mm, the yield
strength increases to 277 MPa. At what grain diameter, in mm, will
the yield strength be 228 MPa?
d =
mm
We were unable to transcribe this imageThe yield strength for an alloy that has an average grain diameter of 5.7 x 10-2 mm is 140 MPa. At a...
3) Macroscopic yielding can be described by the Hall-Petch relation. The table below shows the parameters...
3) Macroscopic yielding can be described by the Hall-Petch relation. The table below shows the parameters for copper and aluminum. Material 0. (MPa) ky (MPa/m12) Copper 25 .112 Aluminum .068 Taking into consideration the microscopic models that have been discussed, explain in detail why copper has larger values of , and ky; consider each parameter independently. Use specific equations to support your answer.
The yield strength for an alloy that was an average grain diameter of 5.4 x 102...
The yield strength for an alloy that was an average grain diameter of 5.4 x 102 mm is 133 MPa. At a grain diameter of 7.4 x 10 mm, the yield strength increases to 250 MPa. At wh grain diameter, in mm, will the yield strength be 203 MPa? mm the tolerance is +/-6% Click if you would like to Show Work for this question: Open Show Work
An uncold-worked brass specimen of average grain size 0.008 mm has a yield strength of 163...
An uncold-worked brass specimen of average grain size 0.008 mm has a yield strength of 163 MPa. Estimate the yield strength of this alloy (in MPa) after it has been heated to 600°C for 1500 s, if it is known that the value of ky is 12.7 MPa-mm 1/2. The Animated Figure 7.25 may be helpful. MPa [The tolerance is +/- 10%.]
Stress Analysis 3. A 20-mm diameter rod made ofa ductile material with a yield strength of...
Stress Analysis
3. A 20-mm diameter rod made ofa ductile material with a yield strength of 350 MPa is subjected to torque of 100 N.m and a bending moment of 150 N.m. An axial force is then gradually applied. Determine the value of force when the rod begins to yield. Solve the problem two ways using the (a) Tresca theory (Maximum shearing stress theory) and (b) von Mises theory (Maximum distortion energy theory) [12+12 points
3. A 20-mm diameter rod...
An uncold-worked brass specimen of average grain size 0.008 mm has a yield strength of 151...
An uncold-worked brass specimen of average grain size 0.008 mm has a yield strength of 151 MPa. Estimate the yield strength of this alloy (in MPa) after it has been heated to 600°C for 1220 s, if it is known that the value of ky is 11.5 MPa-mm 1/2. The Animated Figure 7.25 may be helpful. MPa (The tolerance is +/- 10%.) Click if you would like to Show Work for this question: Open Show Work
(20%) Question 6. The elastic modulus, yield strength and ultimate strength of a certain material afe...
(20%) Question 6. The elastic modulus, yield strength and ultimate strength of a certain material afe 110 GPa 2400 MPa and 265 MPal respectively. If a cylindrical bar of this material 380 mm long is subjected to a uniaxial tension test and its length is increased by an amount áf O.50 mm under a tensile load ót 6660 N.At the same time its diameter decreased by0,28 mm Calculate; a) The initial diameter of the bar, (8%) d b) Under an...
The tensile strength of polycrystalline spinel can be approximated using the Hall-Petch relation. If the spinel has a grain size of 5 um, its tensile strength is 200 GPa. For a grain size of 200 pm, the tensile strength decreases to 170 GPa. (a) Determine the Hall-Petch constants. (4 points) (b) Determine the tensile strength if the grain size increases to 250 um. Explain your answer. (4 points)
o adjacent and parallel planes of atoms(Gie. The magnitude of the distance between two adjacent and parn lanar spacing dhkl, is a function of the Miller indices and the interp crystal whose lattice parameter is a (unit cell edge length), the relation araters e relation is as follows: ( For BCC iron compute the interplanar spacing for the (220) set of planes (i) Compute the diffraction angle for the (220) set of planes using Brag's low Given for BCC iron:...
The yield strength ơy of low-carbon steel is moderately dependent on the grain size D, and the relation can be described by the equation: where σ, and k are material constants. The yield strength is 322 MPa for a grain size of 180 um and 363 MPa for a grain size of 22 um. (a) Calculate the yield strength of the steel for a grain size of 11 um. (b) Explain briefly the physical significance of the constant ơ0.
The yield strength for an alloy that has an average grain
diameter of 5.7 × 10-2 mm is 140 MPa. At a
grain diameter of 7.3 × 10-3 mm, the yield
strength increases to 277 MPa. At what grain diameter, in mm, will
the yield strength be 228 MPa?
d =
mm
We were unable to transcribe this imageThe yield strength for an alloy that has an average grain diameter of 5.7 x 10-2 mm is 140 MPa. At a...
3) Macroscopic yielding can be described by the Hall-Petch relation. The table below shows the parameters for copper and aluminum. Material 0. (MPa) ky (MPa/m12) Copper 25 .112 Aluminum .068 Taking into consideration the microscopic models that have been discussed, explain in detail why copper has larger values of , and ky; consider each parameter independently. Use specific equations to support your answer.
The yield strength for an alloy that was an average grain diameter of 5.4 x 102 mm is 133 MPa. At a grain diameter of 7.4 x 10 mm, the yield strength increases to 250 MPa. At wh grain diameter, in mm, will the yield strength be 203 MPa? mm the tolerance is +/-6% Click if you would like to Show Work for this question: Open Show Work
An uncold-worked brass specimen of average grain size 0.008 mm has a yield strength of 163 MPa. Estimate the yield strength of this alloy (in MPa) after it has been heated to 600°C for 1500 s, if it is known that the value of ky is 12.7 MPa-mm 1/2. The Animated Figure 7.25 may be helpful. MPa [The tolerance is +/- 10%.]
Stress Analysis
3. A 20-mm diameter rod made ofa ductile material with a yield strength of 350 MPa is subjected to torque of 100 N.m and a bending moment of 150 N.m. An axial force is then gradually applied. Determine the value of force when the rod begins to yield. Solve the problem two ways using the (a) Tresca theory (Maximum shearing stress theory) and (b) von Mises theory (Maximum distortion energy theory) [12+12 points
3. A 20-mm diameter rod...
An uncold-worked brass specimen of average grain size 0.008 mm has a yield strength of 151 MPa. Estimate the yield strength of this alloy (in MPa) after it has been heated to 600°C for 1220 s, if it is known that the value of ky is 11.5 MPa-mm 1/2. The Animated Figure 7.25 may be helpful. MPa (The tolerance is +/- 10%.) Click if you would like to Show Work for this question: Open Show Work
(20%) Question 6. The elastic modulus, yield strength and ultimate strength of a certain material afe 110 GPa 2400 MPa and 265 MPal respectively. If a cylindrical bar of this material 380 mm long is subjected to a uniaxial tension test and its length is increased by an amount áf O.50 mm under a tensile load ót 6660 N.At the same time its diameter decreased by0,28 mm Calculate; a) The initial diameter of the bar, (8%) d b) Under an...
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