For an impressible, isotropic material, what is its Poisson’s ratioName:...

Question

For an impressible, isotropic material, what is its Poisson’s ratio
Name: ___________________________
HW of ETM 307 Chapter 10: Al Alloys
70 pts in total
For materials science, the essential point is to figure out an effective way to increase materials strength without significantly compromising ductility. When we learned precipitation strengthening, we knew that, for a given amount of an alloying element, fine and uniform-distributed precipitates generated by the alloying element are more efficient in increasing materials strength than the element’s atoms staying as solid solution atoms. We just finished learning the aging treatment of Al alloys, the questions for you are:
1.
You are given an equili
ium-solidified Al-Cu alloy indicated in Figure 1. Please advise a heat treatment procedure that can be used to achieve a maximum strength without losing a significant amount of ductility. Please draw your temperature history in the temperature-time coordinate beside the phase diagram and describe the microstructure change in each heat treatment step. (40 pts)
C
548
o
2.
What is precipitate-free zone? How does it form? How to get rid of it? (20 pts)
3.
There are heat treatable and non-heat treatable Al alloys. What makes this difference? (10 pts)
Copper (wt.%)
Temperature (°C)
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Temperature (°C)
Time
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Fig.1
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hwch10-etm307-f2019-1-okhcxkid.doc

Samarpeet · Accepted Answer

For an impressible, isotropic material, what is its Poisson’s ratio
Name: ___________________________
HW of ETM 307 Chapter 10: Al Alloys
70 pts in total
For materials science, the essential point is to figure out an effective way to increase materials strength without significantly compromising ductility. When we learned precipitation strengthening, we knew that, for a given amount of an alloying element, fine and uniform-distributed precipitates generated by the alloying element are more efficient in increasing materials strength than the element’s atoms staying as solid solution atoms. We just finished learning the aging treatment of Al alloys, the questions for you are:
1. 	You are given an equilibrium-solidified Al-Cu alloy indicated in Figure 1. Please advise a heat treatment procedure that can be used to achieve a maximum strength without losing a significant amount of ductility.

For an impressible, isotropic material, what is its Poisson’s ratio Name: ___________________________ HW of ETM 307 Chapter 10: Al Alloys 70 pts in total For materials science, the essential point is...

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