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首页> 外文期刊>Materials Science and Engineering >Formation of Ti_2AlN and TiB and its effect on mechanical properties of Ti46Al4Nb1Mo alloy by adding BN particles
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Formation of Ti_2AlN and TiB and its effect on mechanical properties of Ti46Al4Nb1Mo alloy by adding BN particles

机译：通过添加BN颗粒，形成Ti_2Aln和Tib及其对Ti46Al4NB1MO合金的力学性能的影响

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摘要

The synergistic effects of B and N on the microstructure evolution, mechanical properties and fracture behavior of Ti46Al4Nb1Mo alloy were investigated by adding BN particles. Ti46Al4Nb1Mo-xB-xN (x = 0, 0.4%, 0.8%, 1.2%, 1.6%, atomic percent, hereafter in at.%) alloys were prepared by vacuum arc melting. Compared with Ti46Al4Nb1Mo alloy, B2 phase disappeared and curvy TiB phase appeared at the interdendritic region in the Ti46Al4Nb1Mo-0.4B-0.4 N alloy. When 0.8% B and 0.8% N were added, Ti2AlN particles appeared in alpha(2)/gamma lamellar colonies, tiny TiB particles and a few curvy TiB phases formed both at lamellar boundaries and lamellar colonies. With further increasing B and N content, the volume fraction of Ti2AlN and tiny TiB phases increased, and some long TiB phases appeared in the Ti46Al4Nb1Mo-1.6B-1.6 N alloy. Ti2AlN and TiB phases formed by the reaction between Ti46Al4Nb1Mo alloy and BN particles. The different formation mechanism between Ti2Al and TiB was related to the different solid solubility of B and N in the Ti46Al4Nb1Mo alloy and solute redistribution during solidification process. When the content of B and N increased from 0 to 1.2%, the average lamellar colony size decreased from 358.4 mu m to 48.7 mu m, which resulted from synergistic effect of Ti2AlN and TiB. Compression results showed that the strength was improved from 1961 MPa to 2493 MPa without decreasing compressive strain. The fracture morphology showed Inter-granular and inter-lamellar fracture mode in the Ti46Al4Nb1Mo alloy, while the fracture morphology showed trans-lamellar mode in the reinforced composites. The second phase strengthening of Ti2AlN and TiB, grain boundary strengthening by refined alpha(2)/gamma lamellae, and elimination of B2 phase contributed to the improvement of strength.
机译：通过添加BN颗粒，研究了B和N对Ti46Al4NB1MO合金的微观结构演化，机械性能和断裂行为的协同作用。通过真空电弧熔化制备，Ti46Al4NB1MO-XB-XN（x = 0，0.4％，0.8％，1.2％，1.6％，原子百分比，下文中。与Ti46Al4NB1MO合金相比，B2相消失，曲面滴度在Ti46Al4NB1MO-0.4b-0.4n合金中出现在Interdendritic区。当添加0.8％B和0.8％N时，Ti2Aln颗粒出现在α（2）/γ层状菌落中，微小的Tib颗粒和在层状边界和层状菌落中形成的几个曲率Tib相。通过进一步增加B和N含量，Ti2aln和微小Tib阶段的体积分数增加，并且在Ti46Al4NB1MO-1.6b-1.6 n合金中出现了一些长的Tib阶段。通过Ti46Al4NB1MO合金和BN颗粒之间的反应形成的Ti2Aln和Tib相。 Ti2Al和Tib之间的不同形成机制与Ti46Al4NB1MO合金中B和N的不同固体溶解度有关，并在凝固过程中溶质再分布。当B和N的含量增加到1.2％至1.2％时，平均层状菌落尺寸从358.4μm至48.7μm降低，这导致Ti2aln和Tib的协同效应。压缩结果表明，从1961MPa至2493MPa改善了强度而不会降低压缩菌株。骨折形态显示Ti46Al4NB1MO合金中的颗粒状和层间骨折模式，而裂缝形态显示在增强复合材料中的反式层状模式。通过精制α（2）/γ薄片的Ti2aln和Tib，强化强化的第二相强化，消除B2相的消除有助于提高强度。

著录项

  • 来源
    《Materials Science and Engineering》 |2019年第may22期|161-171|共11页
  • 作者

    Tan Yingmei; Chen Ruirun; Liu Yangli; Ding Hongsheng; Su Yanqing; Guo Jingjie; Fu Hengzhi;

  • 作者单位

    Harbin Inst Technol Natl Key Lab Precis Hot Proc Met Harbin 150001 Heilongjiang Peoples R China;

    Harbin Inst Technol Natl Key Lab Precis Hot Proc Met Harbin 150001 Heilongjiang Peoples R China|Harbin Inst Technol State Key Lab Adv Welding & Joining Harbin 150001 Heilongjiang Peoples R China;

    Harbin Inst Technol Natl Key Lab Precis Hot Proc Met Harbin 150001 Heilongjiang Peoples R China;

    Harbin Inst Technol Natl Key Lab Precis Hot Proc Met Harbin 150001 Heilongjiang Peoples R China;

    Harbin Inst Technol Natl Key Lab Precis Hot Proc Met Harbin 150001 Heilongjiang Peoples R China;

    Harbin Inst Technol Natl Key Lab Precis Hot Proc Met Harbin 150001 Heilongjiang Peoples R China;

    Harbin Inst Technol Natl Key Lab Precis Hot Proc Met Harbin 150001 Heilongjiang Peoples R China;

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

    TiAl; BN; Microstructure; Fracture behavior;

    机译：TiAl;BN;微观结构;骨折行为;

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