The Influence of Surface Roughness on Diffusion Bonding of High Nb Containing TiAl Alloy

DOI

10.2991/ame-16.2016.106How to use a DOI?

Keywords

TiAl alloy, Diffusion bonding, Microstructure, Surface roughness, Oxygen.

Abstract

The solid-state diffusion bonding experiments of the high Nb containing TiAl alloy were successfully carried out at the 1100 under a uniaxial pressure of 30MPa for 45min, and the microstructure as well as the shear strength of the diffusion bonding interface with different surface roughness were investigated. The surface roughness was measured by AFM, and the microstructure characterization of interfaces was taken by SEM, EDS, AES. In addition, the bond qualities were evaluated by shear testing at room temperature. The results indicated that the surface roughness is of importance to improve the quality of diffusion bonding joint. Moreover the white layer microstructure at the bonding interface was found in some samples which was caused by the oxygen content about 2%~3%. Furthermore, the shear teat showed that the shear strength of the joints can achieve 383MPa with the surface roughness is 0.062 m. Meanwhile, the recrystallization phenomenon at the diffusion bonding interface could improve the shear strength.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Lei Zhu
AU  - Xiang-Yi Xue
AU  - Bin Tang
AU  - Hong-Chao Kou
AU  - Jin-Shan Li
PY  - 2016/06
DA  - 2016/06
TI  - The Influence of Surface Roughness on Diffusion Bonding of High Nb Containing TiAl Alloy
BT  - Proceedings of the 2nd Annual International Conference on Advanced Material Engineering (AME 2016)
PB  - Atlantis Press
SP  - 635
EP  - 643
SN  - 2352-5401
UR  - https://doi.org/10.2991/ame-16.2016.106
DO  - 10.2991/ame-16.2016.106
ID  - Zhu2016/06
ER  -