Question: Help me understand this problem. Please explain and label steps, thank you! 3. (20) INCLUDED IN EXAM 2 Aluminum alloy (6061) (Al with 0.6 wt.%

Help me understand this problem. Please explain and label steps, thank you!

3. (20) INCLUDED IN EXAM 2 Aluminum alloy (6061) (Al with 0.6 wt.% Si and 1.0 wt.% Mg) is subjected to age hardening treatment. (a) (8) Plot the temperature versus time of the heat treatment process with reference to the pseudo-binary phase diagram below. Indicate the different heat treatment steps on your graph. 600 a + Liquid 595.C 1.859 400 a + Me.S 2001 16 WINMAS (b) (12) Please make a sketch of the hardness as a function of annealing time (precipitation treatment) and explain why does the hardness increase and/or decrease over time

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