Below attached is the microstructure of the sample after cold working and after recrystallization. Identify from C10200, C11000, C17200, C21000, C26000, C36000, C46400. The alloys differ in color (copper or brass), microstructure, (1 or 2 phase), and properties. Kindly justify your choice.

 

(a) after cold working

(b) after re-crystallization.

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Hardness, HRB Worked Sample Load** Diameter. lbs) 7,000 Diameter, de (in.) 0.58 Reheated True Stress True Strain d. (in.) 0,502 21.9 20.7 26494.3 -0.297 a 9,000 0,503 0.61 27.8 24.2 30795.9 -0.398 11,000 0,501 0.64 33.9 29.5 34193.4 -0.494 13,000 0,502 0.69 37.1 32.6 34766.0 -0.644 15,000 0,504 0.73 42.9 39.5 35829.0 -0.757 17,000 0,501 0.78 49 44.7 35577.0 -0,889 Hardness, HRB Worked Sample Load** Diameter. lbs) 7,000 Diameter, de (in.) 0.58 Reheated True Stress True Strain d. (in.) 0,502 21.9 20.7 26494.3 -0.297 a 9,000 0,503 0.61 27.8 24.2 30795.9 -0.398 11,000 0,501 0.64 33.9 29.5 34193.4 -0.494 13,000 0,502 0.69 37.1 32.6 34766.0 -0.644 15,000 0,504 0.73 42.9 39.5 35829.0 -0.757 17,000 0,501 0.78 49 44.7 35577.0 -0,889