Microstructure and properties of in-situ synthesized Cu-1 wt%TiC alloy followed by ECAP and post-annealing |
| |
| Authors: | Shizhan Ni Jinghua Jiang Jianqing Chen Dan Song and Aibin Ma |
| |
| Institution: | College of Mechanics and Materials, Hohai University, Nanjing 210098, China;College of Mechanics and Materials, Hohai University, Nanjing 210098, China;College of Mechanics and Materials, Hohai University, Nanjing 210098, China;College of Mechanics and Materials, Hohai University, Nanjing 210098, China;College of Mechanics and Materials, Hohai University, Nanjing 210098, China |
| |
| 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. |
| |
| Keywords: | Cu-1 wt%TiC alloy In-situ reaction Dispersion strengthen Equal channel angular pressing Annealing Mechanical properties Conductivity |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《自然科学进展(英文版)》浏览原始摘要信息 |
| 点击此处可从《自然科学进展(英文版)》下载免费的PDF全文 |
|
