• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >Effect of Mn addition on the microstructure and tensile properties of Al-15%Mg_2Si composite
【24h】

Effect of Mn addition on the microstructure and tensile properties of Al-15%Mg_2Si composite

机译：Mn的添加对Al-15％Mg_2Si复合材料显微组织和拉伸性能的影响

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

This research was carried out to investigate the influence of different concentrations of Mn (0.5,1, 2, 3 and 5%) on the microstructure and tensile properties of Al-15wt.S6Mg_2Si metal matrix composite. Microstructural examination was carried out using optical and scanning electron microscopy (SEM). The results depicted that 1 wt.% Mn addition changes the morphology of primary Mg_2Si from irregular to polyhedral shape and its average particle size decreases from 40μm to 12μm. Cubic morphology of particles was also observed by the addition of 2% Mn. Further addition of Mn (>2%) did not significantly change the size or morphology of the primary Mg_2Si. Microstructural studies also showed that Mn addition changes the morphology of the eutectic Mg_2Si phase from flake-like to rod-like. Tensile properties of specimens with different Mn contents were also investigated. The results of tensile testing revealed that optimum Mn level for improving both UTS and elongation values is 2 wt.%. At higher Mn concentrations, an intermetallic phase (Al_6Mn) introduced on eutectic cell boundaries appears to be the main reason for slight reduction in tensile properties. A study of the fracture surfaces via SEM revealed a brittle mode of failure in Mn free composite. However, the addition of 2 wt.% Mn changes the fracture mode to ductile by increasing fine dimples and reducing the number of decohered particles thereby increasing the composite ductility.
机译：本研究旨在探讨不同浓度的Mn（0.5、1、2、3和5％）对Al-15wt.S6Mg_2Si金属基复合材料的组织和拉伸性能的影响。使用光学和扫描电子显微镜（SEM）进行微观结构检查。结果表明，添加1 wt。％的Mn会使原始Mg_2Si的形态从不规则形状变为多面体形状，并且其平均粒径从40μm减小至12μm。通过添加2％的Mn也观察到了颗粒的立方形态。进一步添加Mn（> 2％）不会显着改变初级Mg_2Si的尺寸或形态。显微组织研究还表明，Mn的添加将共晶Mg_2Si相的形态从片状变为棒状。还研究了不同Mn含量的试样的拉伸性能。拉伸测试的结果表明，用于改善UTS和伸长率值的最佳Mn含量为2重量％。在较高的Mn浓度下，引入共晶晶胞边界的金属间相（Al_6Mn）似乎是拉伸性能略有下降的主要原因。通过SEM对断裂表面进行的研究表明，无锰复合材料的脆性破坏模式。然而，添加2重量％的Mn通过增加细微的凹坑并减少脱粘颗粒的数量将断裂模式改变为可延展的，从而增加了复合材料的延展性。

著录项

  • 来源
    《Materials Science and Engineering》 |2012年第30期|p.191-198|共8页
  • 作者

    M.R.Ghorbani; M. Emamy; R. Khorshidi; J. Rasizadehghani; A.R. Emami;

  • 作者单位

    School of Metallurgy and Materials, College of Engineering, University of Tehran, Tehran 11365-4563, Iran;

    School of Metallurgy and Materials, College of Engineering, University of Tehran, Tehran 11365-4563, Iran;

    Department of Materials, Faculty of Engineering, Semnan University, Semnan, Iran;

    School of Metallurgy and Materials, College of Engineering, University of Tehran, Tehran 11365-4563, Iran;

    Young Researchers club, Science and Research Branch, Islamic Azad University, Tehran, Iran;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    mechanical characterization; Al-Mg2Si composite; casting; fracture;

    机译：机械特性Al-Mg2Si复合材料;铸件;断裂;

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