...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >Effects of Cu and Ag additions on age-hardening behavior during multi-step aging in Al-Mg-Si alloys
【24h】

Effects of Cu and Ag additions on age-hardening behavior during multi-step aging in Al-Mg-Si alloys

机译：铜和银的添加对Al-Mg-Si合金多步时效时效行为的影响

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

Low Cu and Ag additions ( ≤ 0.10 at%) were found to strongly affect the age-hardening behavior in Al-Mg-Si alloys with Mg+Si > 1.5 at%. The hardness increased during aging at 170 ℃ and the formation of β" precipitates was kinetically accelerated. The activation energy of the formation of the β" phase was calculated to 127,105,108 and 99 KJmol~(-1) in the base, Cu-added, Ag-added and Cu-Ag-added alloys, respectively using the Kissinger method. The negative effect of two-step aging caused by the formation of Cluster (1) during natural aging was not overcome by the addition of microalloying elements. However, it was suppressed by the formation of Cluster (2) through a pre-aging at 100 ℃. Quantitative analysis of the precipitate microstructure was performed using a transmission electron microscope equipped with a parallel electron energy loss spectrometer for the determination of specimen thickness. The formation of Cluster (2) was found to increase the number density of β" precipitates, whereas the formation of Cluster (1) decreased the number density and increased the needle length. The effects of low Cu and Ag additions in combination with multi-step aging are discussed based on microstructure observations and hardness and resistivity measurements.
机译：发现低的Cu和Ag添加量（≤0.10 at％）会强烈影响Mg + Si> 1.5 at％的Al-Mg-Si合金的时效硬化行为。在170℃时效过程中硬度增加，β“沉淀物的形成在动力学上得到加速。在添加铜的基础上，β'相形成的活化能经计算为127,105,108和99 KJmol〜（-1）。分别使用基辛格方法添加Ag和添加Cu-Ag的合金。通过添加微合金元素无法克服自然老化过程中簇（1）的形成引起的两步老化的负面影响。然而，通过在100℃下的预时效形成簇（2）抑制了它。使用配备有平行电子能量损失谱仪的透射电子显微镜对沉淀物的微观结构进行定量分析，以确定样品的厚度。发现簇（2）的形成增加了β“析出物的数量密度，而簇（1）的形成降低了数量密度并增加了针长。基于微观结构观察以及硬度和电阻率测量，讨论了逐步老化。

著录项

  • 来源
    《Materials Science and Engineering》 |2013年第10期|154-162|共9页
  • 作者

    JaeHwang Kim; Calin Daniel Marioara; Randi Holmestad; Equo Kobayashi; Tatsuo Sato;

  • 作者单位

    Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, 2-12-1-S8-13, O-okayama, Meguro-ku, Tokyo, 152-8552, Japan;

    SINTEF Materials and Chemistry, N-7465 Trondheim, Norway;

    Department of Physics, Norwegian University of Science and Technology (NTNU), Hegskoleringen 5, N-7491 Trondheim, Norway;

    Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, 2-12-1-S8-13, O-okayama, Meguro-ku, Tokyo, 152-8552, Japan;

    Precision and Intelligence Laboratory, Tokyo Institute of Technology, 4259-R2-18. Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan;

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

    Al-Mg-Si alloys; age hardening; two types of nanoclusters; cu addition; Ag addition;

    机译：铝镁硅合金;时效硬化两种类型的纳米团簇;铜加成;银添加;

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