Effect of nano Y2O3 addition on microstructure and room temperature tensile properties of Ti-48Al-2Cr-2Nb alloy

被引：33
|
作者：
Tian, Jing [1 ,2 ]
Zhang, Dongdong [1 ]
Chen, Yuyong [1 ,2 ]
Zhang, Guoqing [3 ]
Sun, Jianfei [1 ,2 ]
机构：
[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China
[2] Harbin Inst Technol, Natl Key Lab Precis Hot Proc Met, Harbin 150001, Heilongjiang, Peoples R China
[3] Beijing Inst Aeronaut Mat, Beijing 100095, Peoples R China
来源：
VACUUM | 2019年 / 170卷
基金：
中国国家自然科学基金;
关键词：
TiAl alloy; Nano Y2O3; Refine microstructure; Precipitate; MECHANICAL-PROPERTIES; TITANIUM ALUMINIDES; OXIDATION RESISTANCE; TIAL ALLOYS; YTTRIUM; STABILITY; DESIGN; OXIDES; NB;
D O I：
10.1016/j.vacuum.2019.06.026
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ti-48Al-2Cr-2Nb alloy reinforced with ceramic particle Y2O3 was fabricated by induction skull melting (ISM) technique in a vacuum environment. The thermodynamic feasibility of the reactions between nano Y2O3 and molten alloy has been considered. The as-cast microstructure of Ti-48Al-2Cr-2Nb adding nanoY(2)O(3) during melting was analyzed by OM, SEM, EDS and TEM. It is concluded that multiple reinforcements are synthesized and they show different shapes. Y2O3 grows in regular geometry shapes when the content of Y2O3 is about 0.1 at. % and grows in dendritic shapes when the content of Y2O3 is below 0.05 at.%. The work shows that adding nano Y2O3 could refine microstructure of TiAl and improve strength and elongation of TiAl alloy effectively within a certain range.
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页数：9
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