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

Wang, Gang; Wu, Peng; Wang, Wei; Zhu, Dongdong; Tan, Caiwang; Su, Yongsheng; Shi, Xinying; Cao, Wei

doi:10.3390/app8060920

Cited by 10 publications

(7 citation statements)

References 43 publications

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“…4) At the cooling stage, more and more (Ti,Zr)2(Cu, Ni) phase was formed due to the reaction of β-Ti→ α-Ti + (Ti,Zr)2(Cu, Ni). However, α-Ti and β-Ti were not detected, which is different from the previous report [24,27]. The interfacial reaction layer contains AlCuTi and Ti2Al.…”

Section: Tabulates Chemical Compositions Of Phasescontrasting

confidence: 99%

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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 Phasescontrasting

confidence: 99%

“…The high purity Ti, Al, Cr metals, and an Nb-Al intermediate alloy were employed as precursors. The detailed preparation process and microstructure were reported in a previous work [27]. The ZrB2 (80 vol% ) and SiC(20 vol %) powder mixtures were hot pressed at 2223 K for 3600 s under vacuum and a pressure of 30 MPa.…”

Section: Methodsmentioning

confidence: 99%

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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“…Therefore, phases B and D were suggested to be Ti 2 Ni (Al, Nb) phases, as demonstrated in Refs. [18,19]. In addition, as observed in Figure 5, diffraction peaks of Ti 2 Ni were detected on the fracture surface of the Ti 2 AlNb side, further proving the formation of Ti 2 Ni (Al, Nb) phases in the joint.…”

Section: Resultsmentioning

confidence: 52%

Microstructural Evolution and Mechanical Properties of Ti2AlNb/GH99 Superalloy Brazed Joints Using TiZrCuNi Amorphous Filler Alloy

Cai

Liu

et al. 2023

Aerospace

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Dissimilar materials brazing of Ti2AlNb alloy to GH99 superalloy is of great pragmatic importance in the aerospace field, especially the lightweight space aircraft components manufacturing. In this work, TiZrCuNi amorphous filler alloy was used as brazing filler, and experiments were carried out at different brazing temperatures and times to investigate the changes in interfacial structures and properties of the joints. The typical interfacial microstructure was Ti2AlNb alloy/B2/β/Ti2Ni (Al, Nb) + B2/β + (Ti, Zr)2(Ni, Cu) + (Ti, Zr)(Ni, Cu)/(Cr, Ni, Ti) solid solution + (Ni, Cr) solid solution/GH99 superalloy when being brazed at 1000 °C for 8 min. The interfacial microstructure of the joints was influenced by diffusion and reaction between the filler alloy and the parent metal. The prolongation of brazing process parameters accelerated the diffusion and reaction of the liquid brazing alloy into both parent metals, which eventually led to the aggregation of (Ti, Zr)2(Ni, Cu) brittle phase and increased thickness of Ti2Ni (Al, Nb) layer. According to fracture analyses, cracks began in the Ti2Ni (Al, Nb) phase and spread with it as well as the (Ti, Zr)2(Ni, Cu) phase. The joints that were brazed at 1000 °C for 8 min had a maximum shear strength of ~216.2 MPa. Furthermore, increasing the brazing temperature or extending the holding time decreased the shear strength due to the coarse Ti2Ni (Al, Nb) phase and the continuous (Ti, Zr)2(Ni, Cu) phase.

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“…Medical titanium and alumina are joined with Au foil for implantable devices [25]. Cu-based amorphous filler is used for brazing TiAl alloy for high temperature applications [26].…”

Section: Introductionmentioning

confidence: 99%

Phase Transformation of a Ti-15Mo-5Zr-3Al Brazed Joint Using Clad Ti-15Cu-15Ni Filler

Yue

Chen

Shiue

et al. 2020

Metals

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Furnace brazing of Ti-15Mo-5Zr-3Al (Ti-15-5-3, β-Ti) alloy using clad Ti-15Cu-15Ni foil as the filler in a high vacuum has been carried out. In the brazed joints, the chemical compositions of distinct phases were quantified by electron probe micro-analyzer (EPMA), and the phase structures were identified by electron backscatter diffraction (EBSD). The as-brazed joint composed of α-Ti, retained β-Ti, Ti2Ni, and Ti2Cu. The embrittlement of the brazed joint was correlated mainly with the formation of intermetallics, especially cellular Ti2Ni dendrites in the brazed zone. It was noticed that the molten filler liquated the β-Ti grain boundaries and assisted the eutectic reaction therein, resulting in forming grain boundary Ti2Ni surrounded by the retained β-Ti. The results indicated that proper brazing conditions were able to eliminate all the harmful phases effectively, and increased the shear strength of the Ti-15Mo-5Zr-3Al brazed joint.

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

Abstract: The results of present work will provide the possibility for the preparation of TiAl alloy shaped parts and expand the application area of amorphous alloys.

Cited by 10 publications

References 43 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

Microstructural Evolution and Mechanical Properties of Ti2AlNb/GH99 Superalloy Brazed Joints Using TiZrCuNi Amorphous Filler Alloy

Phase Transformation of a Ti-15Mo-5Zr-3Al Brazed Joint Using Clad Ti-15Cu-15Ni Filler

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