Briefly compare the toughness of the materials (hint: toughness is directly related to the absorbed energy)

Izod Impact Test

(a) Use the table below with absorbed energy (Joules) results obtained for three materials tested. Calculate the average toughness and standard deviation for each material

Izod Impact Test	Steel	Brass	Aluminum
1	2.56	1.87	0.97
2	2.62	1.72	0.79
3	2.68	1.67	0.80
Average absorbed energy
Standard deviation

(b) Sample calculation for any one metal

(c) Briefly compare the toughness of the materials (hint: toughness is directly related to the absorbed energy)

Charpy Impact Test: Briefly discuss using the fracture surface image and the absorbed energy the difference in the impact resistance of the steel sample tested at room temperature and -59oC.