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- Title
Interface microstructure evolution and bonding strength of TC11/γ-TiAl bi-materials fabricated by laser powder deposition.
- Authors
Xu, Zhi-Jun; Zhang, Yong-Zhong; Liu, Ming-Kun; Gong, Xin-Yong
- Abstract
Laser powder deposition was applied to fabricate the Ti-6.5Al-3.5Mo-1.5Zr-0.3Si (wt%)/Ti-47Al-2Cr-2Nb-0.2W-0.15B (at%) bi-material system. The as-deposited TC11 alloy shows a basket-wave-like morphology while the as-deposited γ-TiAl alloy consists of fully α/γ lamellar microstructures. Regarding the thermal mismatch between TC11 and γ-TiAl during processing, the interface microstructure evolution was concerned. The transformation pathway was illustrated. It is found that the content changes of Al elements and β-stabilizers Mo, Cr, and Nb are responsible for the evolution of microstructures at the interface. The fracture surfaces are located at the γ-TiAl side. The bi-material shows a brittle-fracture manner, with the ultimate tensile strength of 560 MPa.
- Publication
Rare Metals, 2016, Vol 35, Issue 6, p456
- ISSN
1001-0521
- Publication type
Article
- DOI
10.1007/s12598-014-0243-1