Fabrication of nano-TiC reinforced high Nb-TiAl nanocomposites by electron beam melting

被引：18
|
作者：
Kan, W. [1 ]
Chen, B. [2 ]
Peng, H. [3 ]
Liang, Y. [1 ]
Lin, J. [1 ]
机构：
[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
[2] Univ Leicester, Sch Engn, Leicester LE1 7RH, Leics, England
[3] Beihang Univ, Key Lab High Temp Struct Mat & Coatings Technol, Minist Ind & Informat Technol, Beijing 100191, Peoples R China
来源：
MATERIALS LETTERS | 2020年 / 259卷
基金：
英国工程与自然科学研究理事会;
关键词：
Nanoparticles; Composite materials; Metals and alloys; MECHANICAL-PROPERTIES; MICROSTRUCTURE; ALLOY; AL;
D O I：
10.1016/j.matlet.2019.126856
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
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页数：4
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