Samples of cartridge brass (Cu-30% Zn) were cold-rolled and then annealed for one hour. The data shown in the table below were obtained.

(a) Plot the yield strength and grain size as a function of annealing temperature on the same graph, Use two vertical axes, one for hardness and one for grain size.
(b) For each temperature, state which stages of the annealing process occurred.
Justify your answers by referring the features of the plot.

Transcribed Image Text:

Annealing Temperature (C 400 500 600 700 800 Yield Strength (MPa 159 138 124 62 48 Gl'alln Size (uin 15 23 53 140 505