4.5 Article

The microstructure and mechanical properties of Al2024-SiCp composite fabricated by powder thixoforming

期刊

JOURNAL OF MATERIALS RESEARCH
卷 32, 期 11, 页码 2079-2091

出版社

CAMBRIDGE UNIV PRESS
DOI: 10.1557/jmr.2017.95

关键词

-

资金

  1. Basic Scientific Fund of Gansu University [G2014-07]
  2. Program for New Century Excellent Talents of the University of China [NCET-10-0023]
  3. Program for Hongliu Outstanding Youth of the Lanzhou University of Technology

向作者/读者索取更多资源

In this study, SiC particle reinforced Al2024 matrix composites were fabricated by powder thixoforming (PT). Meanwhile, 2024 alloys were fabricated by permanent mold cast (PMC) and PT, respectively, to reveal superiorities of PT technology over the traditional processing technologies and the resulting composite over the matrix alloy. The microstructures and mechanical properties of the three materials were comparatively investigated. The results indicated that both the PT materials possessed finer spheroidal primary particles and smaller eutectic concentration, but the PMC alloy comprised large equiaxed grains, continuously net-shaped eutectic structures, and many porosities. The mechanical properties of the PT alloy were significantly higher than those of the PMC alloy because of the enhanced compactness and work hardening, decreased eutectic concentration, and fine primary particles. The incorporation of SiCp to the PT alloy further brought improvements, the ultimate tensile strength (UTS), yield strength (YS), and hardness were increased by 29.3% (UTS = 388 MPa), 35% (YS = 297 MPa), and 46.8% (hardness = 122.6 HV), respectively. A strengthening model considering different strengthening mechanisms and SiCp failure was proposed and YS of composite could be exactly predicted.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.5
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据