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尺寸变化对Cu-Nb-Cu多芯复合线材微观结构及性能影响

Wang Pengfei,Liang Ming,Xu Xiaoyan,Jiao Gaofeng,Ma Xiaobo,Lu Yafeng,Li Chengshan

RARE METAL MATERIALS AND ENGINEERING（2015）

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Abstract
采用集束拉拔技术制备出高强高导Nb管增强Cu-Nb多芯复合线材,样品直径为Φ2.5 mm时,强度接近1.1 GPa,导电率达到74％IACS.选取不同尺寸线径(Φ3.0 mm、Φ2.7 mm、Φ2.5 mm)的复合线材,通过场发射扫描电镜测试手段表征了不同尺寸线材的芯丝形貌、Cu-Nb界面的微观结构,探讨了多尺寸条件下芯丝和界面微观组织的演变规律及特性,最后结合σ-ε曲线图和R-T曲线图,详细分析了尺寸变化所引起线材性能的演变机理.
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Key words
bundling and drawing process,Nb tube,microstructure,mechanical property
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