合金元素对ti-nb基合金阻尼性能影响word格式论文.docxVIP

优秀毕业论文 精品参考文献资料 Alloys containing B exhibited favorable damping property, while alloys with Mo, or B possessed satisfactory mechanical properties. Although the addition of B brought about favored comprehensive performance, the existence form of B in the alloys is still under consideration. The damping behavior of Ti-Nb-B indicates that B can participate in the Snoek relaxation process as an interstitial atom due to its small diameter. Furthermore, large content of B element will lead to multiple peaks in the curves damping property. Aiming at improving the formability of Ti alloy, Ti-Nb-O alloys were prepared by powder metallurgy method as well. The results showed that the as-prepared alloys had better performance, especially the damping value, than the alloys fabricated by arc smelting. Hence, it convinced that it is possible to prepare Ti alloys by powder metallurgy. KEY WORDS：Ti-25.0Nb-1.5O alloy, alloying element, Snoek-type relaxation effect, dipole shape factor 目 录  HYPERLINK \l _bookmark0 第一章 绪论1  HYPERLINK \l _bookmark1 1.1 高阻尼材料的研究背景 1  HYPERLINK \l _bookmark2 1.1.1 高阻尼材料的分类2  HYPERLINK \l _bookmark3 1.1.2 影响高阻尼材料性能的因素4  HYPERLINK \l _bookmark4 1.1.3 高阻尼材料的应用5  HYPERLINK \l _bookmark5 1.1.4 阻尼性能的测试方法与测量仪器6  HYPERLINK \l _bookmark6 Snoek 型高阻尼合金 9  HYPERLINK \l _bookmark7 Snoek 弛豫理论 9  HYPERLINK \l _bookmark8 Snoek 型高阻尼钛合金 12  HYPERLINK \l _bookmark9 Snoek 型高阻尼钛合金的阻尼特性 14  HYPERLINK \l _bookmark10 1.3 合金体系的选择和研究的意义 15  HYPERLINK \l _bookmark11 1.3.1 选题背景15  HYPERLINK \l _bookmark12 1.3.2 阻尼合金的选择15  HYPERLINK \l _bookmark13 1.3.3 课题研究的内容和意义17  HYPERLINK \l _bookmark14 第二章 实验材料及方法19  HYPERLINK \l _bookmark15 2.1 实验步骤 19  HYPERLINK \l _bookmark16 2.2 合金的制备 20  HYPERLINK \l _bookmark17 2.2.1 电弧熔炼法制备合金20  HYPERLINK \l _bookmark18 2.2.2 粉末冶金法制备合金21  HYPERLINK \l _bookmark19 2.2.3 试样的制备21  HYPERLINK \l _bookmark20 2.3 实验测试方法 22  HYPERLINK \l _bookmark21 2.3.1 微观组织与相结构分析22  HYPERLINK \l _bookma