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| ECAPT 工艺对 SiCp/ Al 基复合材料组织和性能的影响 |
| Microstructure and Properties of ECAPT of SiCp/ Al Particulate Composite |
| Received:December 09, 2012 Revised:February 01, 2013 |
| DOI：10.3969/j.issn.1674-6457.2013.02.008 |
| 中文关键词: 大塑性变形 等径角挤扭 金属基复合材料 SiC 颗粒 显微组织 力学性能 |
| 英文关键词: SPD ECAPT MMCs SiCp microstructure mechanical property |
| 基金项目:国家自然科学基金(51175138) ;高等学校博士学科点专项基金(20100111110003) |
| Author Name | Affiliation | | LI Cheng-ming | School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China | | LI Ping | School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China | | ZHANG Xiang | School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China | | DONG Fei | School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China |
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| 中文摘要: |
| 探究了用等径角挤扭( ECAPT) 法制备的 SiCp/ Al 基复合材料组织演化过程和力学性能。 比较了2 种体积分数的 SiCp(8 . 75% 和 35% ) 复合材料在 ECAPT 中组织演化规律,测试了其硬度值及致密度。 结果表明,ECAPT 形变量大,细化晶粒能力强,SiCp 分布均匀性好,其致密效果 SiCp 体积分数大的( 35% ) 比小的(8 . 75% ) 差;并且体积分数为 35% 的 SiCp 复合材料存在“ 拱桥效应冶 ,但颗粒细化效果优于体积分数为 8 .75% 的 SiCp。 |
| 英文摘要: |
| This article is about microstructure evolution of SiCp/ Al matrix composites in the processing of equal channel angular pressing and twist extrusion ( ECAPT) and mechanical properties of the sample after ECAPT. During ECAPT, microstructure evolution processes of different percentage compositions of SiCp( volume fraction 8. 75% and 35% ) are explored. The effects of ECAPT on different volumes of SiCp/ Al particulate composite's hardness and density are analyzed. It is shown that ECAPT is a tool to get the strong defomation and the good ability to refine grain and distribute SiCp. Density of 35% SiCpcomposite material billet is smaller than that of 8. 75% SiCp, and to 35% SiCpcomposite material ," Arch Bridge Effect" happens, but its refining effect is better than that of 8. 75% SiCp. |
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