Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 742, Issue -, Pages 501-507Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2018.11.045
Keywords
Cu-Ni-Si-Cr alloy; Pre-deformation; Defect; Precipitation; Properties
Categories
Funding
- foundation of National Ministry and Commission [613262]
- National Natural Science Foundation of China (NSFC) [51621063]
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The effects of pre-deformation on the precipitation behaviors and properties in Cu-Ni-Si-Cr alloy were investigated. The results showed the electrical conductivity and the strength of the alloys after peak aging increased with the pre-deformation amount. Quantitative analyses demonstrated the deformation-induced defects improved the precipitation and the number density of precipitates but reduced their average radii. As a result, the conductivity improved due to the slight promotion of precipitation while the strength increased mostly from the enhanced precipitate strengthening and then from the unremoved work hardening. At elevated temperatures, the effects of pre-deformation were greatly weakened and then the difference among the alloys after different treatments disappeared.
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