| 摘要 |
In accordance with one aspect of the present invention is the metamorphic processing of a beryllium-copper alloy. The alloy is (i) thermodynamically treated for greater than about 10 hours at a temperature generally within a range of 900 DEG to 1500 DEG F., (ii) warm worked at greater than about 30% strain at a strain rate +Z greater than or equal to about (2.210x107)/exp[(2.873x104)/(T+459.4 DEG )], where T is in DEG F., at the temperature, (iii) annealed at a temperature between 1375 DEG and 1500 DEG F. for about 15 minutes to about 3 hours, (iv) water quenched, and (v) thermal hardened at a temperature generally within a range of about 480 DEG and 660 DEG F. Grain size is reduced with concomitant improvements in ultimate strength, toughness, total elongation, % reduction in area and ultrasonic inspectability.
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