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

Bin Tang; Xian Sheng Qi; Hong Chao Kou; Jin Shan Li; Srdjan Milenkovic

doi:10.1002/adem.201500457

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

Bin Tang, Xian Sheng Qi, Hong Chao Kou, Jin Shan Li, Srdjan Milenkovic

School of Materials Sience and Engineering

Research output: Contribution to journal › Article › peer-review

34 Scopus citations

Abstract

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 1 100 °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 1 150 °C/30 MPa/45 min and 1100 °C/40 MPa/45 min.

Original language	English
Pages (from-to)	657-664
Number of pages	8
Journal	Advanced Engineering Materials
Volume	18
Issue number	4
DOIs	https://doi.org/10.1002/adem.201500457
State	Published - 1 Apr 2016

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title = "Recrystallization Behavior at Diffusion Bonding Interface of High Nb Containing TiAl Alloy",

abstract = "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 1 100 °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 1 150 °C/30 MPa/45 min and 1100 °C/40 MPa/45 min.",

author = "Bin Tang and Qi, {Xian Sheng} and Kou, {Hong Chao} and Li, {Jin Shan} and Srdjan Milenkovic",

note = "Publisher Copyright: {\textcopyright} 2015 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.",

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T1 - Recrystallization Behavior at Diffusion Bonding Interface of High Nb Containing TiAl Alloy

AU - Tang, Bin

AU - Qi, Xian Sheng

AU - Kou, Hong Chao

AU - Li, Jin Shan

AU - Milenkovic, Srdjan

PY - 2016/4/1

Y1 - 2016/4/1

N2 - 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 1 100 °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 1 150 °C/30 MPa/45 min and 1100 °C/40 MPa/45 min.

AB - 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 1 100 °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 1 150 °C/30 MPa/45 min and 1100 °C/40 MPa/45 min.

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

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