MSE 220 Exam 2 Winter 2020
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, (1) Refer to the Aluminum – Magnesium (Al-Mg) phase diagram; [ ] = pts
a) [2] Define the line marked AB (describe what it means) and state the maximum value.
b) [4] For a 20 wt% Mg alloy, what are the phase compositions at 500C?
c) [4] For a 70 wt% Mg alloy, what are the phase amounts at 300C?
d) [2] Identify any ONE invariant point (name, temperature, composition) AND write
the corresponding specific phase transformation reaction on cooling.
e) [8] For a 10 wt% Mg alloy, describe the detailed steps that could be used to
precipitation harden/strengthen this alloy. State a representative temperature at each
step. Describe the final microstructure in words.
This study source was downloaded by 100000899610689 from CourseHero.com on 09-25-2025 01:25:23 GMT -05:00
https://www.coursehero.com/file/88344603/MSE220-W2020-Exam2doc/
Name =
Discussion Section =
"I have neither given nor received aid on this exam, nor have I witnessed any violation of the Honor
Code."
Signature =
Page 1 = / 20
Page 2 = / 14
Page 3 = / 21
Page 4 = / 26
Page 5 = / 19
Total = /100
This study source was downloaded by 100000899610689 from CourseHero.com on 09-25-2025 01:25:23 GMT -05:00
https://www.coursehero.com/file/88344603/MSE220-W2020-Exam2doc/
, (1) Refer to the Aluminum – Magnesium (Al-Mg) phase diagram; [ ] = pts
a) [2] Define the line marked AB (describe what it means) and state the maximum value.
b) [4] For a 20 wt% Mg alloy, what are the phase compositions at 500C?
c) [4] For a 70 wt% Mg alloy, what are the phase amounts at 300C?
d) [2] Identify any ONE invariant point (name, temperature, composition) AND write
the corresponding specific phase transformation reaction on cooling.
e) [8] For a 10 wt% Mg alloy, describe the detailed steps that could be used to
precipitation harden/strengthen this alloy. State a representative temperature at each
step. Describe the final microstructure in words.
This study source was downloaded by 100000899610689 from CourseHero.com on 09-25-2025 01:25:23 GMT -05:00
https://www.coursehero.com/file/88344603/MSE220-W2020-Exam2doc/
