1. Special Edition: Supercooled, Superheated & Supersaturated
Supercooled – “supercooled fiji water freezing”. Googling words
Why did the water freeze by tapping on the bottle?
Superheated – “superheated solution exploding”
Why did the water explode in the microwave oven?
Supersaturated – “supersaturated salt solution crystallizing youtube”
Why did massive precipitation occur when a grain of sodium acetate was dropped?
Supercooled Water Superheated Water Supersaturated Water 1

2. Activity 3 - Phase Characterization – 40% Sn, A Hypoeutectic Alloy (150C)
Given temp. & nom. comp what are: 1. Phases Present 2. Each Phase Chemical Comp. 3. Each Phase Weight Fraction
Given:
1) Temp
2) Nominal comp % Sn - % Pb
Get:
1) Phases Present
2) Phases Chem. comp.
3) Phases Frac.
Given 1) 150C; 2) 40Sn-60Pb (2-phase region)
nominal composition 2

3. Activity 2 - Stress Strain Curve Example Calculation Determine the following quantities given below.
Elastic modulus: E = _________
Yield Strength: YS 0.2%e = ________
Tensile Strength: TS = _________
Breaking Strength: BS = ________
Ductility % elongation %el = ________
Ductility % Reduct. Area: %RA = _______ x
Afinal = 0.9 Aoriginal 3

4. Activity 2: Effect of Cold Work on YS, TS, & %el
Reduce a Cu rod 0.40 in (10.2 mm) dia. to 0.35 in (8.9 mm).
Determine YS, TS and ductility Cu
Cold
Work D f
= 0.35 in D o
= 0.40 in
YS TS %el
YS = ________
TS = ________
Ductility %el = ___ YS 4