Recrystallization Behavior at Diffusion Bonding Interface of High Nb Containing TiAl Alloy

被引：37

作者：

Tang, Bin ^{[1
]}

Qi, Xian Sheng ^{[1
]}

Kou, Hong Chao ^{[1
]}

Li, Jin Shan ^{[1
]}

Milenkovic, Srdjan ^{[2
]}

机构：

[1] Northwestern Polytech Univ, Natl & Local Joint Engn Res Ctr Precis Thermal Fo, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

[2] IMDEA Mat Inst, Madrid 28906, Spain

来源：

ADVANCED ENGINEERING MATERIALS | 2016年 / 18卷 / 04期

基金：

欧盟第七框架计划;

关键词：

HYDROGENATED TI6AL4V INTERLAYER; MECHANICAL-PROPERTIES; TITANIUM ALUMINIDES; NI/AL NANOLAYERS; MICROSTRUCTURE; TEMPERATURE; PHASE; INTERMETALLICS; JOINTS; CAST;

D O I：

10.1002/adem.201500457

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A series of diffusion bonding tests are conducted on a high Nb containing TiAl alloy with full lamellar (FL) microstructure and the effect of interfacial recrystallization behavior on the shear strength is discussed. Microstructural observations reveal that bonding above 1100 degrees C and 30 MPa results in recrystallization at the bonding interface flanked by FL microstructure, thus promoting the interface migration and leading to a sound joint. Based on the present results, the nucleation mechanism of recrystallization at the bonding interface is studied. Shear testing results show that recrystallization at the bonded zone improves the bonding quality of the joints by changing the failure mode. The shear strength of the joints attains 400 MPa when bonding at 1150 degrees C/30MPa/45 min and 1100 degrees C/40MPa/45 min.

引用

页码：657 / 664

页数：8

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