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Characterization and properties of intermetallic Al_3Ti alloy synthesized by reactive foil sintering in vacuum

机译：真空反应箔烧结合成金属间化合物Al_3Ti的表征与性能

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摘要

A dense monolithic intermetallic Al_3Ti alloy was successfully synthesized via reactive sintering in vacuum using TC4 alloy and pure aluminum foils with appropriate initial thickness. Energy dispersive spectroscopy (EDS), x-ray diffractometry (XRD), and scanning electron microscopy (SEM) were used to characterize the phase and microstructure of Al_3Ti alloy. Ultrasonic measurement was performed to evaluate the physical property of Al_3Ti alloy. Different thermal analysis, thermogravimetry (TG) and differential scanning calorimetry (DSC) were used to assess the thermal property of Al_3Ti alloy. The compressive tests were carried out on a universal load frame to determine the mechanical properties, including the compressive strength and failure strain of the fabricated intermetallic Al_3Ti alloy. The current results indicated that the density of Al_3Ti alloy is slightly higher than the theoretical density, the average Young's modulus is lower than the theoretical value. A trace of aluminum in Al_3Ti alloy was detected, which is distinctly affected on the density, Young's modulus and mechanical properties of this titanium aluminide alloy. The stress-strain curves of Al_3Ti alloy shows a linear elastic behavior without any plastic deformation, and the fracture features are the mixed fracture of transgranular and intergranular. Some other fundamental physical and mechanical properties of the Al_3Ti alloy were also obtained in the present study.
机译：采用TC4合金和具有适当初始厚度的纯铝箔，通过真空反应烧结成功地合成了致密的整体金属间Al_3Ti合金。用能谱仪（EDS），X射线衍射仪（XRD）和扫描电子显微镜（SEM）表征了Al_3Ti合金的相和组织。进行超声波测量以评估Al_3Ti合金的物理性能。采用不同的热分析，热重法（TG）和差示扫描量热法（DSC）评估Al_3Ti合金的热性能。在通用载荷框架上进行了压缩试验，以确定机械性能，包括所制造的金属间Al_3Ti合金的压缩强度和破坏应变。当前的结果表明，Al_3Ti合金的密度略高于理论密度，平均杨氏模量低于理论值。在Al_3Ti合金中检测到微量铝，这对该铝化钛合金的密度，杨氏模量和力学性能有明显影响。 Al_3Ti合金的应力-应变曲线表现出线性的弹性行为，没有任何塑性变形，断裂特征是晶界和晶界的混合断裂。在本研究中还获得了Al_3Ti合金的一些其他基本物理和机械性能。

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  • 来源
    《Journal of Materials Research》 |2016年第17期|2706-2713|共8页
  • 作者

    Ningxia Wei; Xiaoxiao Han; Xueyi Zhang; Yang Cao; Chunhuan Guo; Zichuan Lu; Fengchun Jiang;

  • 作者单位

    Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China;

    College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, China;

    College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, China;

    Mechanical and Electrical Engineering Institute, Zhengzhou University of Light Industry, Zhengzhou 450002, China;

    Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China;

    Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China;

    Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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