Microstructure and Properties of a Deformation-Processed Cu-Cr-Ag In Situ Composite by Directional Solidification
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Cu-7Cr-0.07Ag alloys were prepared by casting and directional solidification, from which deformation-processed in situ composites were prepared by thermo-mechanical processing. The microstructure, mechanical properties, and electrical properties were investigated using optical microscopy, scanning electronic microscopy, tensile testing, and a micro-ohmmeter. The second-phase Cr grains of the directional solidification Cu-7Cr-0.07Ag in situ composite were parallel to the drawing direction and were finer, which led to a higher tensile strength and a better combination of properties.
KeywordsCu-Cr-Ag directional solidification in situ composite microstructure property
This project was financially supported by the National Natural Science Foundation of China (No. 50961006), the Key Program of Natural Science Foundation of Jiangxi Province (No. 20133BAB20008), the Open Foundation of Jiangxi Key Laboratory for Advanced Copper and Tungsten Materials (No. 2011-TW-02, 2010-WT-01), and the Natural Science Foundation of Jiangxi Academy of Sciences (No. 2012-YQC-09).
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