Abstract
On the ductility of α solid solution alloys, such as Cu-Al, Cu-Zn, Cu-20%Ni and Cu-2%Si, the effects of compositions and strain rates were examined over a wide range of temperature. The results are summarized as follows:
(1) The ductility in the low temperature range of about 77∼500 K, was related to the work hardening characteristic that depends on the stacking fault energy.
(2) The intermediate temperature embrittlement was observed in all alloys excepting the Cu-Ni system, and it became more pronounced with increasing solute concentration.
(3) In the higher temperature range above 800 K, the ductility increased abnormally, and the behaviour was explained by the solute dragging motion of dislocations.
(4) The above change in ductility appears to be commonly observed in many other α solid solutions of copper alloys.
