Copper-rich copper–beryllium alloys are precipitation hardenable. After consulting the por...

Copper-rich copper–beryllium alloys are precipitation hardenable. After consulting the portion of the phase diagram shown in Figure 11.31, do the following:

(a) Specify the range of compositions over which these alloys may be precipitation hardened.

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(b) Briefly describe the heat-treatment procedures (in terms of temperatures) that would be used to precipitation harden an alloy having a composition of your choosing yet lying within the range given for part (a).

Figure 11.31 The copper-rich side of the copper– beryllium phase diagram.

[Adapted from Binary Alloy Phase Diagrams, 2nd edition, Vol. 2, T. B. Massalski (Editor-in-Chief), 1990. Reprinted by permission of ASM International, Materials Park, OH.]