期刊
MATERIALS LETTERS
卷 288, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.matlet.2021.129353
关键词
Fatigue; Cu-Ni-Si alloy; Electric conductivity; Discontinuous precipitates; Cold-rolling
资金
- Japan Society for the Promotion of Science, Japan [18H01340]
- National Research Founda-tion of Korea, Republic of Korea, [NRF] grant - Korea government [MSIP] [2020M3D1A2098962]
- Grants-in-Aid for Scientific Research [18H01340] Funding Source: KAKEN
- National Research Foundation of Korea [2020M3D1A2098962, 5199991414323] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The tensile and fatigue strengths of Cu-6Ni-1.5Si alloy specimens with different precipitate structures were compared, showing that the CR-DP specimen exhibited the highest strength and comparable electrical conductivity to the DP specimen. The excellent performance combination may be attributed to changes in microstructure and surface states during stress.
Cu-6Ni-1.5Si alloy having fully fiber-shaped discontinuous precipitates was fabricated by overaging (DP specimen), and subsequently cold-rolled down to 80% reduction in area (CR-DP specimen). The tensile and fatigue strengths of DP and CR-DP specimens were compared to those of CP specimen with nano-sized continuous precipitates by normal aging. The CR-DP specimen showed the highest tensile and fatigue strengths among the specimens tested, and comparable electrical conductivity to the DP specimen. The reason for such an excellent combination of tensile strength, fatigue strength and electrical conductivity was discussed based on the change in microstructure and surface states during stressing. (C) 2021 Elsevier B.V. All rights reserved.
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