金属基复合材料的几何参数和机械性能研究

IF 0.9 4区 材料科学 Q3 MATERIALS SCIENCE, CERAMICS
T. Kulpinas, R. Kandrotaitė Janutienė, O. Sizonenko
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引用次数: 0

摘要

随着航空航天工业的不断发展,对能承受高温和腐蚀性环境的新材料的需求也在不断增长。本文研究了在上述环境中茁壮成长的 Ti-Al-C 系统材料。根据相关标准介绍了测量晶粒尺寸的方法。根据 ASTM E112 和 ASTM E562 标准,分别测定了用不同参数和方法制作的两个系列试样的碳化钛几何参数及其体积分数。根据 ASTM E112 标准测定的晶粒大小为 G12 和 G12.5。两个系列试样的体积分数分别为 20.22% 和 17.65%。利用上述参数,使用 RVE 模型确定了测试试样的弹性模量、剪切模量和泊松比。RVE 结果表明,体积分数越高、平均晶粒尺寸越大的材料越硬。TiC 含量较高的试样显示出较高的弹性模量和剪切模量,分别为 153.6 和 58.3 GPa。泊松比最低,为 0.315。然而,试样之间的差异并不显著,TiC 含量较低的试样的弹性模量和剪切模量分别为 145 和 55.2 GPa。泊松比较高,等于 0.319。将上述特性与常用的航空航天合金 Ti-6Al-4V 相比,两种试样的硬度都要高得多。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Study of Geometric Parameters and Mechanical Properties of Metal-Based Composites

Study of Geometric Parameters and Mechanical Properties of Metal-Based Composites

Study of Geometric Parameters and Mechanical Properties of Metal-Based Composites

As the aerospace industry continues to grow, so does the demand for new materials that can withstand high temperatures and corrosive environments. In this paper, materials from the Ti–Al–C system that thrives in the aforementioned environments are studied. The method of measuring the grain size was described according to the relevant standards. The geometrical parameters of titanium carbide and its volume fraction have been determined under the ASTM E112 and ASTM E562 standards, respectively, for two series of specimens that were produced with different parameters and methods. The grain sizes determined are G12 and G12.5 according to ASTM E112. The volume fractions determined for the two series of samples are 20.22 and 17.65%, respectively. Using the above parameters, elastic and shear modulus, and Poisson’s ratio were determined for the specimens tested using RVE modeling. RVE results showed that materials with higher volume fractions and larger average grain size resulted in stiffer materials. Specimens with higher TiC content exhibited higher elastic and shear modules, which were 153.6 and 58.3 GPa, respectively. Poisson’s ratio was the lowest at 0.315. However, the difference was not significant between the specimens, the elasticity and shear modulus, of a specimen with a lower concentration of TiC, are 145 and 55.2 GPa, respectively. Poisson’s ratio was higher and equal to 0.319. Comparing the above properties with the popular aerospace alloy Ti–6Al–4V, both specimens are much stiffer.

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来源期刊
Powder Metallurgy and Metal Ceramics
Powder Metallurgy and Metal Ceramics 工程技术-材料科学:硅酸盐
CiteScore
1.90
自引率
20.00%
发文量
43
审稿时长
6-12 weeks
期刊介绍: Powder Metallurgy and Metal Ceramics covers topics of the theory, manufacturing technology, and properties of powder; technology of forming processes; the technology of sintering, heat treatment, and thermo-chemical treatment; properties of sintered materials; and testing methods.
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