Abstract
Hot compression experiments were conducted on a Cu–Ag–Zr alloy with low Ag content, Cu–3Ag–0.6Zr, to investigate the effect of precipitation on the mechanical response of this alloy. The results show that the stress-strain behavior of Cu–3Ag–0.6Zr alloy is significantly affected by the precipitation. The flow stress of the alloy deformed at temperatures of 623–673 K and a strain rate of 10 −3 s −1 increases due to the occurrence of the continuous and discontinuous precipitation. However, the precipitation process is suppressed with increasing strain rate, resulting in almost identical flow stress of the alloy deformed at different temperatures.
Highlights
Cu–Ag–Zr alloys with low Ag contents have been considered for aerospace application such as the thrust chamber of liquid rocket engine because of their high thermal conductivity [1]
When the strain rate rises to 10-2 s-1 (Fig. 1(b)), the gap between the stress-strain curves obtained at different temperatures reduces
A series of hot compression experiments were carried out on samples of the Cu–3Ag–0.6Zr alloy to investigate the effect of precipitation on the mechanical response of this alloy
Summary
Cu–Ag–Zr alloys with low Ag contents have been considered for aerospace application such as the thrust chamber of liquid rocket engine because of their high thermal conductivity [1]. For this application, Ag is considered as a strengthening element, and the addition of Zr enhances the formation of precipitates, which can improve the strength level of copper alloys [2, 3]. The results of the subsequent tensile test revealed that the yield and ultimate tensile strength of the aged NARloy-Z were increased, indicating the strengthening effect of these precipitates. Jia et al [6] researched the aging hardening behavior of Cu–0.1Ag–0.2Zr alloy
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