...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >The influence of niobium, tantalum and zirconium on the microstructure and creep strength of fully lamellar γ/α_2 titanium aluminides
【24h】

The influence of niobium, tantalum and zirconium on the microstructure and creep strength of fully lamellar γ/α_2 titanium aluminides

机译：铌，钽和锆对完全层状γ/α_2钛铝化物微观结构和蠕变强度的影响

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

Titanium aluminides are excellent materials for light-weight applications at high temperatures. To enhance their creep strength, various alloying elements are added. In this work the effect of 5 at% Niobium (Nb), Tantalum (Ta) and Zirconium (Zr) on the creep properties of ternary Ti-44Al-5X (X = Nb, Ta, Zr) with a fully lamellar microstructure, is systematically studied. These alloying elements have a high solubility in titanium aluminides, and show a different alpha(2)/gamma partitioning behavior as well as a different influence on the lattice parameters of both phases. The average interface distance between the alpha(2)- and gamma-phase is adjusted to about 300 nm by the cooling rate to evaluate the influence of the three alloying elements. The creep tests reveal that all three alloying elements increase the creep resistance of titanium aluminides, particularly Ta and Zr. Ta seems to extend the pronounced primary creep regime, whereas Zr seems to reduce it The alloying elements decrease also the lamellar spacing compared to the binary alloy. Microstructural investigations after the creep tests show a beneficial effect of the alloying elements on the microstructural stability during creep exposure, since they retard the discontinuous coarsening rate.
机译：铝化钛是用于高温轻量应用的出色材料。为了提高其蠕变强度，添加了各种合金元素。在这项工作中，含5at％的铌（Nb），钽（Ta）和锆（Zr）对具有完全层状微结构的三元Ti-44Al-5X（X = Nb，Ta，Zr）的蠕变性能的影响是系统地研究。这些合金元素在铝化钛中具有高溶解度，并且显示出不同的alpha（2）/γ分配行为以及对两相晶格参数的不同影响。通过冷却速率将α（2）和γ相之间的平均界面距离调整为约300 nm，以评估三种合金元素的影响。蠕变测试表明，所有三种合金元素均会提高铝化钛，特别是Ta和Zr的抗蠕变性。 Ta似乎扩展了明显的初生蠕变区，而Zr似乎降低了它。与二元合金相比，合金元素还减小了层状间距。蠕变测试后的微结构研究表明，合金元素对蠕变暴露过程中的微结构稳定性有有益的影响，因为它们会阻碍不连续的粗化速率。

著录项

  • 来源
    《Materials Science and Engineering》 |2019年第28期|46-53|共8页
  • 作者

    Bresler J.; Neumeier S.; Ziener M.; Pyczak F.; Goeken M.;

  • 作者单位

    Friedrich Alexander Univ Erlangen Nurnberg FAU, Mat Sci & Engn, Inst 1, Martensstr 1, D-91058 Erlangen, Germany;

    Friedrich Alexander Univ Erlangen Nurnberg FAU, Mat Sci & Engn, Inst 1, Martensstr 1, D-91058 Erlangen, Germany;

    Friedrich Alexander Univ Erlangen Nurnberg FAU, Mat Sci & Engn, Inst 1, Martensstr 1, D-91058 Erlangen, Germany;

    Helmholtz Zentrum Geesthacht, Inst Mat Res, Max Planck Str 1, D-21502 Geesthacht, Germany;

    Friedrich Alexander Univ Erlangen Nurnberg FAU, Mat Sci & Engn, Inst 1, Martensstr 1, D-91058 Erlangen, Germany;

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

    Titanium aluminides; Microstructure; Alloying elements; Creep;

    机译：铝化钛;微观结构;合金元素;蠕变;

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