Question

1. The following data were obtained from a Charpy impact test for a ductile cast iron containing 2.55 wt% Si. Plot the data and find the ductile to brittle transition temperature. What does this transition temperature signify? Would you use this material in a product that undergoes constant impact forces below 0^oC? Why or why not? Explain. Use graph supplied on next page.

TEST TEMPERATURE (oC)	IMPACT ENERGY (ft-lb)
-50	4
-20	4
0	6.4
8	8.8
14	12
20	16
24	20
28	24.8
32	27.2
50	34
75	38
100	38
125	38

Answer 1

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