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董亚光,董祥雷,王琮琳,赵红亮.组合时效对高强导电Cu-Ti-Fe-Cr合金箔组织和性能的影响[J].稀有金属材料与工程(英文),2020,49(5):1689~1693.[Yaguang Dong,Xianglei Dong,Conglin Wang and Hongliang Zhao.Microstructure and properties evolution of high-strength conductive Cu-Ti-Fe-Cr alloy foils treated by combined aging process[J].Rare Metal Materials and Engineering,2020,49(5):1689~1693.]
Microstructure and properties evolution of high-strength conductive Cu-Ti-Fe-Cr alloy foils treated by combined aging process
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Received:January 24, 2019  Revised:February 23, 2019
DOI:
Key words: Cu-Ti alloy  combined aging process  microstructure  electrical conductivity
Foundation item:国家自然科学基金资助(No.51801186)、国家重点实验室开放课题(No.SKLSP 20814)
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Yaguang Dong,Xianglei Dong,Conglin Wang and Hongliang Zhao  
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Abstract:
      Effects of combined aging process on microstructure and properties of age-hardenable Cu-3Ti-0.2Fe-0.2Cr alloy foils were investigated by mean of hardness test, tensile test, conductivity test, OM and SEM. It was shown that after the optimized combined aging treatment of pre-rolling with the reduction of 50%, pre-aging at 450 ℃ for 4 h, re-rolling with the reduction of 95.6% and re-aging at 450 ℃ for 1.5 h, the hardness, tensile strength, elongation and electrical conductivity of Cu-3Ti-0.2Fe-0.2Cr alloy foil were 354.6 HV, 1062 MPa, 1.9% and 17.1 %IACS, respectively. Compared with the specimen treated with Pre-0 h+CR+Re-2 h, the alloy foil treated with optimized combined aging process possessed the similar mechanical properties and higher electrical conductivity. The fractograph of the studied alloy foil treated with optimized combined aging process was composed of flat facets resembling cleavage, river pattern and dimples, manifesting a mixed-rupture mode.