• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >Microstructural refinement and wear property of Al-Si-Cu composite subjected to extrusion and high-pressure torsion
【24h】

Microstructural refinement and wear property of Al-Si-Cu composite subjected to extrusion and high-pressure torsion

机译：挤压和高压扭转作用下Al-Si-Cu复合材料的组织细化和磨损性能

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The effect of high-pressure torsion (HPT) on the microstructure and the mechanical properties, especially the wear properties, of an Al-Si-Cu alloy (represented by Al-15%Si-2.5%Cu-0.5%Mg) and its composite, which was reinforced by SiC particles (SiC_p) at a volume fraction of 5%, was investigated systematically in this study. The Al-Si-Cu/SiC_p composite is produced in a powder metallurgy process followed by hot extrusion (EXTR) at 565 ℃. The EXTR specimen is also subjected to HPT processing at an anvil rotation speed of 0.5 rpm under a quasi-hydrostatic pressure of 5 GPa. HPT processing leads to a nanostructured microstructure comprised of equiaxed α-Al grains (60-70 nm) and secondary particles and phases; the SiC_p with a damaged facet, the phase exhibiting high Mg content and the intermetallic CuAl_2 phase, for the Al-Si-Cu/SiC_p composite. The values of the tensile strengths and hardness of the HPT specimens are nearly twice higher than those of the EXTR specimens for the Al-Si-Cu alloy and the Al-Si-Cu/SiC_p composite. Ball-on-disc tests were used to examine the wear resistance of the processed materials. The wear test results indicated that HPT processing significantly reduces the wear loss, thereby leading to improvement in the load bearing capacity and the wear resistance of the Al-Si-Cu alloy and the Al-Si-Cu/SiC_p composite. This behavior is linked to HPT processing, based on the refined and homogenous microstructure that results in an increase in the hardness.
机译：高压扭转（HPT）对Al-Si-Cu合金（以Al-15％Si-2.5％Cu-0.5％Mg表示）及其组织的力学性能，特别是磨损性能的影响本研究对体积分数为5％的SiC颗粒（SiC_p）增强的复合材料进行了研究。 Al-Si-Cu / SiC_p复合材料是通过粉末冶金工艺生产的，然后在565℃进行热挤压（EXTR）。还对EXTR试样在5 GPa的准静水压力下以0.5 rpm的砧转速进行HPT处理。 HPT加工产生了由等轴α-Al晶粒（60-70 nm）以及次级颗粒和相组成的纳米结构微观结构。 Al-Si-Cu / SiC_p复合材料的刻面受损的SiC_p，Mg含量高的相和金属间化合物CuAl_2相。 HPT试样的抗拉强度和硬度值几乎是Al-Si-Cu合金和Al-Si-Cu / SiC_p复合材料的EXTR试样的两倍。圆盘球测试用于检查加工材料的耐磨性。磨损测试结果表明，HPT处理显着降低了磨损损失，从而改善了Al-Si-Cu合金和Al-Si-Cu / SiC_p复合材料的承载能力和耐磨性。这种行为与HPT加工有关，基于精炼均匀的微观结构，导致硬度增加。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号