Mechanical properties of particle reinforced titanium and titanium alloys

IF 0.7 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Kovove Materialy-Metallic Materials Pub Date : 2010-01-01 DOI:10.4149/KM_2010_2_87

C. Poletti, G. Holtl

引用次数: 4

Abstract

Titanium grade 2, Ti-6Al-4V and Ti-6Al-6V-2Sn unreinforced and reinforced with 10–15 vol.% SiC particles, 5 vol.% TiB whiskers and 12–20 vol.% TiC are characterized by compression tests, micro-, macro- and nano-hardness measurements, and X-ray diffraction. The measured Young’s moduli up to 350 ◦ C were found to be described using the Halpin Tsai model for the TiC and of TiB reinforced materials (aspect ratio of 1 and 100, respectively). The strengthening by SiC addition is attributed to matrix strain hardening due to the thermal misfit between the matrix and the reinforcement. The strengthening of TiC reinforced material is attributed to interstitial C dissolved in the alpha phase proved with the nanohardness results. TiB precipitates produce strengthening by grain refinement and dispersion hardening. The presence of 1 wt.% of C in the matrix also should be the reason for higher Young’s modulus and strengthening. K e y w o r d s : metal-matrix composites (MMCs), mechanical properties, deformation, elastic properties, powder metallurgy

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颗粒增强钛及钛合金的力学性能

通过压缩试验、显微、宏观和纳米硬度测量以及x射线衍射对2级钛、Ti-6Al-4V和Ti-6Al-6V-2Sn未增强和增强的材料进行了表征，并分别添加了10 - 15%的SiC颗粒、5%的TiB晶须和12% - 20%的TiC。测量到的杨氏模量高达350°C，发现使用TiC和TiB增强材料的Halpin Tsai模型(长径比分别为1和100)进行描述。SiC的强化是由于基体与增强体之间的热失配引起的基体应变硬化。TiC增强材料的强化是由于α相中溶解了大量的C，纳米硬度测试结果也证实了这一点。TiB析出物通过晶粒细化和弥散硬化产生强化。在基体中存在1 wt.%的C也应该是高杨氏模量和强化的原因。主要研究方向:金属基复合材料(MMCs)，力学性能，变形，弹性性能，粉末冶金

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来源期刊

Kovove Materialy-Metallic Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-METALLURGY & METALLURGICAL ENGINEERING

CiteScore

1.20

自引率

14.30%

发文量

审稿时长

3 months

期刊介绍： Kovove Materialy - Metallic Materials is dedicated to publishing original theoretical and experimental papers concerned with structural, nanostructured, and functional metallic and selected non-metallic materials. Emphasis is placed on those aspects of the science of materials that address: the relationship between the microstructure of materials and their properties, including mechanical, electrical, magnetic and chemical properties; the relationship between the microstructure of materials and the thermodynamics, kinetics and mechanisms of processes; the synthesis and processing of materials, with emphasis on microstructural mechanisms and control; advances in the characterization of the microstructure and properties of materials with experiments and models which help in understanding the properties of materials.