Effect of brazing temperature and brazing time on the microstructure and tensile strength of TiAl-based alloy joints with Ti-Zr-Cu-Ni amorphous alloy as filler metal

Cai, Yuyang; Liu, R.C.; Zhu, Ziang; Cui, Yue; Yang, Rui

doi:10.1016/j.intermet.2017.08.008

Cited by 32 publications

(10 citation statements)

References 26 publications

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“…Consequentially, the (Ti,Zr)2(Cu,Ni) is formed and can be considered as a generalized phase of Ti2Cu, Zr2Cu, Ti2Ni and Zr2Ni. This claim is supported by previous works [34][35][36][37]. The black spot D is mainly formed by the B and Ti, and ascribed to a mixture of TiB and TiB2 subjected to reactions of Ti+ZrB2→TiB2+Zr and Ti+TiB2→TiB.…”

Section: Tabulates Chemical Compositions Of Phasessupporting

confidence: 84%

Effect of brazing temperature on microstructure and mechanical properties of TiAl/ZrB2 joint brazed with CuTiZrNi filler

Wang

Yang

et al. 2019

Journal of Manufacturing Processes

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The TiAl alloy and ZrB2-SiC ceramic are promising materials used at high temperatures. One route to extend their unique applications under extreme conditions relies on successful brazing them together with proper fillers. In this work, brazing temperature influences on microstructural, mechanical, and fractural properties were systemically studied for brazed joints after brazing the TiAl to the ZrB2-SiC with amorphous CuTiZrNi fillers. An optimized brazing was found at 1183 K for 1200 s, yielding a high shear strength of 187 MPa. The joints were mainly consisted of AlCuTi, Ti2Al, (Ti,Zr)2(Cu,Ni), TiB,TiB2, TiCu Ti5Si3, and TiC phases. Brazing temperature substantially changed joint composites. It is found that lower temperature lead to insufficient reaction and remained filler and higher ones to large stress-induced microcracks. Based on element diffusion, a formation mechanism of brazed joint was also proposed.

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Section: Tabulates Chemical Compositions Of Phasessupporting

confidence: 84%

Effect of brazing temperature on microstructure and mechanical properties of TiAl/ZrB2 joint brazed with CuTiZrNi filler

Wang

Yang

et al. 2019

Journal of Manufacturing Processes

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“…%) alloys were joined using amorphous Ti-37.5Zr-15Cu-15Ni (wt %) ribbon, and a tensile strength of 468 MPa was obtained. The results shown that the mechanical behavior of joints is highly dependent on the feature of the interface, especially the content of (Ti, Zr) 2 (Cu, Ni) [25]. From the above analysis, it can be concluded that the Ti-based and Ag-based filler alloys are useful for achieving the sound joint of TiAl alloys.…”

Section: Introductionmentioning

confidence: 89%

Brazing Ti-48Al-2Nb-2Cr Alloys with Cu-Based Amorphous Alloy Filler

Wang

Wang³

et al. 2018

Applied Sciences

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“…Fusion welding processes of TiAl alloys require a careful process control, involving preheating, slowcooling and post-heating, because of high sensitivity of alloy to cold cracking, both on-cooling cracking and solid-state cracks seem to be unavoidable [8,9]. Among the various methods, it has been reported that successful joints can be achieved by diffusion bonding [2,10], diffusion brazing [1,[11][12][13][14][15][16][17], and transient liquid phase bonding (TLP) [7,[18][19][20][21][22]. Diffusion brazing provides a method for joining of materials which are hard to weld.…”

Section: Introductionmentioning

confidence: 99%

“…Huaschildt et al [21] investigated the TLP bonding of a γ -TiAl using Ti-based fillers containing Ni (Ti-24Ni) or Fe (Ti-29Fe) as the melting point depressant (MPD). Cai et al [16] utilised brazing on TiAl-based alloy with Ti-37.5Zr-15Cu-15Ni amorphous alloy. Gale et al have investigated widely on TLP bonding of TiAl alloy by using Cu or Cu+48-2-2 composite interlayers [7,18,25].…”

Section: Introductionmentioning

confidence: 99%

Phase transformation study during diffusion brazing of γ-TiAl intermetallic using amorphous Ni-based filler metals

Kokabi

Kaflou

2020

Materials Science and Technology

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The paper aims at understanding the microstructure evolution of the diffusion brazing of γ-TiAl intermetallic compound using two Ni-based filler metals, a ternary Ni-Si-B, and a quinary Ni-Cr-Fe-Si-B. It was found that the joint region comprised of two distinct zones: analogous reaction layers adjacent to the TiAl substrates and a solidified zone at the middle of the joint region. The reaction layers consisted of separate intermetallic phases regions including ternary and binary Ti-Ni-Al intermetallic compounds. The solidified zone mainly composed of the Al1-xNi3Six isostructural solid solution and athermally Ni-boride or Ni-Cr rich borides containing eutectic microstructures at the joint centerline. The maximum shear strength was 240 MPa, and obtained by using Ni-Cr-Fe-Si-B filler metal. Fracture of the joint with Ni-Cr-Fe-Si-B filler occurred in the reaction layer/solidified zone interface, but joint with Ni-Si-B filler was fractured at solidified zone. GRAPHICAL ABSTRACT

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Effect of brazing temperature and brazing time on the microstructure and tensile strength of TiAl-based alloy joints with Ti-Zr-Cu-Ni amorphous alloy as filler metal

Cited by 32 publications

References 26 publications

Effect of brazing temperature on microstructure and mechanical properties of TiAl/ZrB2 joint brazed with CuTiZrNi filler

Effect of brazing temperature on microstructure and mechanical properties of TiAl/ZrB2 joint brazed with CuTiZrNi filler

Brazing Ti-48Al-2Nb-2Cr Alloys with Cu-Based Amorphous Alloy Filler

Phase transformation study during diffusion brazing of γ-TiAl intermetallic using amorphous Ni-based filler metals

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