Fabrication of nano-TiC reinforced high Nb-TiAl nanocomposites by electron beam melting
Fabrication of nano-TiC reinforced high Nb-TiAl nanocomposites by electron beam melting
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DOI：
10.1016/j.matlet.2019.126856
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发表时间：
2020-01-15
影响因子：
3
通讯作者：
Lin, J.
中科院分区：
文献类型：
--
作者：
Kan, W.;Chen, B.;Lin, J.
采用电子束熔炼技术成功地制备了TiC增强高铌TiAl基复合材料（TiC/Nb-TiAl）。已开发出熔化阶段焦点偏移和线能量的优化组合，以实现纳米TiC颗粒在TiAl基体中均匀分布。EBM TiC/Nb-TiAl纳米复合材料的显微硬度为393 +/- 31 HV 0.2，比高Nb-TiAl合金单独的显微硬度高24%。有趣的是，均匀分布的纳米TiC颗粒导致在TiAl基体中形成等轴α（2）相，而不是以前EBM γ-TiAl工作中通常观察到的γ相。(C)2019爱思唯尔B. V.保留所有权利。
Electron beam melting (EBM) has been successfully applied to fabricate TiC reinforced high Nb-containing TiAl matrix (TiC/Nb-TiAl) nanocomposite. The optimised combination of focus offset and line energy in the melt stage have been developed to achieve a uniformly distributed nano-TiC particles within the TiAl matrix. The EBM TiC/Nb-TiAl nanocomposite has a microhardness of 393 +/- 31 HV0.2, that is 24% higher than that for high Nb-TiAl alloy alone. It is interesting to note that the uniformly distributed nano-TiC particles lead to the formation of equiaxed alpha(2)-phase in TiAl matrix, instead of those commonly observed gamma-phase in previous EBM gamma-TiAl work. (C) 2019 Elsevier B.V. All rights reserved.