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首页> 外文期刊>Materials Science and Engineering >Room and high temperature mechanical behavior of Ti-Al-Nb-Mo alloy reinforced with Ti_2AlN ceramic particles
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Room and high temperature mechanical behavior of Ti-Al-Nb-Mo alloy reinforced with Ti_2AlN ceramic particles

机译：用Ti_2Aln陶瓷颗粒加固Ti-Al-Nb-Mo合金的室温和高温力学行为

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摘要

In order to improve the room and high temperature mechanical properties of Ti46A14NblMo alloy, Ti46A14NblMo-xN (x = 0, 0.4%, 0.8%, 1.2%, 1.6%, atomic percent, hereafter in at.%) alloys were prepared by adding TiN powders. Results showed that when the N addition was more than 0.8%, the grain morphology changed from columnar dendrites to equiaxed grains due to the formation of Ti_2AlN particles, and the equiaxed grain size decreased with further increasing of the N addition. With 1.6% N addition, the compressive strength increased by 16.8% at room temperature, which was due to the collective strengthening effect of lamellae refinement and Ti_2AlN particles. While lamellae refinement and Ti_2AlN particles had opposite effects and competed with each other at high temperature, strengthening by Ti_2AlN particles had the dominant effect on improving the peak stress of the Ti46A14NblMo-1.6 N alloy, which increased by 21.8% and 24.1% at 900 °C and 1000 °C, respectively. In addition, compared with the fracture microstructure at room temperature, the deformed microstructure showed that the load transfer effect of Ti_2AlN particles was more effective at high temperature, which was due to micro-damages in the Ti_2AlN particles and the absence of cracks along irregular Ti_2AlN particles.
机译：为了改善Ti46a14nnblmo合金的房间和高温力学性能，通过加入锡制备，Ti46a14nblmo-xn（x = 0，0.4％，0.8％，1.2％，1.6％，原子百分比，下文）。％）通过加入锡制备合金粉末。结果表明，当N添加大于0.8％时，由于形成Ti_2Aln颗粒，从柱状树枝状颗粒变为等轴晶粒的晶粒形态，并且等轴尺寸随着N添加的进一步增加而降低。添加1.6％N添加，室温下抗压强度增加了16.8％，这是由于薄片细化和Ti_2Aln颗粒的集体强化作用。虽然薄片细化和Ti_2Aln颗粒具有相反的效果并在高温下彼此竞争，但是通过Ti_2Aln颗粒的强化具有显着的影响，提高Ti46a14nblMo-1.6 n合金的峰值应力，其在900°处增加了21.8％和24.1％。 C和1000°C分别。另外，与室温下的断裂微观结构相比，变形的微观结构表明，Ti_2Aln颗粒的负荷转移效果在高温下更有效，这是由于Ti_2Aln颗粒中的微损伤以及沿着不规则的裂缝缺失粒子。

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  • 来源
    《Materials Science and Engineering》 |2020年第21期|140098.1-140098.9|共9页
  • 作者

    Yingmei Tan; Hongze Fang; Hongzhi Cui; Yangli Liu; Ruirun Chen; Yanqing Su; Jingjie Guo; Hengzhi Fu;

  • 作者单位

    National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of Technology Harbin 150001 China;

    National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of Technology Harbin 150001 China;

    School of Materials Science and Engineering Shandong University of Science and Technology Qingdao 266590 China;

    National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of Technology Harbin 150001 China;

    National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of Technology Harbin 150001 China School of Materials Science and Engineering Shandong University of Science and Technology Qingdao 266590 China;

    National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of Technology Harbin 150001 China;

    National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of Technology Harbin 150001 China;

    National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of Technology Harbin 150001 China;

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

    TiAl; Ti_2AlN; Mechanical behavior; B2 phase;

    机译：ti_2aln;力学行为;B2阶段;

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