microstructure and properties of in-situ synthesized cu-1 wt%tic alloy followed by ecap and post-annealing
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2016
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Abstract
A dispersion-strengthened copper alloy with 1 wt% TiC for commercial electrical-contact wires was prepared by in-situ reaction casting, grain-ultrafining by equal-channel angular pressing (ECAP) and subsequent annealing with aim to obtain excellent comprehensive performance. The results showed that fine TiC particles were in-situ synthesized in the as-cast Cu matrix and aggregated in clusters, and thus mechanical properties of the as-cast alloy deemed insufficient. Continued ECAP at 473 K significantly refined the grains of the as-cast alloy and improved the distribution of TiC particles. Due to multiple strengthening mechanisms, the ECAP-processed alloys maintained good conductivity with obviously enhanced tensile strength and hardness values. After post-ECAP annealing, the elongation and conductivity of the fine-grained copper alloy increased with the adequate tensile strength. The novel combined process endows the alloy appropriate performance to serve current high-frequency electrification railway systems.
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ni2016progressmicrostructure
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| Authors | ;Shizhan Ni;Jinghua Jiang;Jianqing Chen;Dan Song;Aibin Ma |
| Journal | acta paediatrica scandinavica |
| Year | 2016 |
| DOI |
10.1016/j.pnsc.2016.11.013
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