(a) From Figure 7.25, compute the length of time required for the average grain diameter t...

(a) From Figure 7.25, compute the length of time required for the average grain diameter to increase from 0.03 to 0.3 mm at 600°C for this brass material.

(b) Repeat the calculation, this time using 700°C.

Figure 7.25 The logarithm of grain diameter versus the logarithm of time for grain growth in brass at several temperatures.

(From J. E. Burke, “Some Factors Affecting the Rate of Grain Growth in Metals.” Reprinted with permission from Metallurgical Transactions, Vol. 180, 1949, a publication of The Metallurgical Society of AIME, Warrendale, Pennsylvania.)