Microstructure evolution and mechanical properties of linear friction welded Ti2AlNb alloy

Chen, X.; Xie, Fei; Ma, Tiejun; Li, W.Y.; Wu, Xiangqing

doi:10.1016/j.jallcom.2015.05.198

Cited by 54 publications

(14 citation statements)

References 35 publications

(26 reference statements)

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“…The BSE images of representative microstructures of base metal, weld zone, and TMAZ are shown in Figure , respectively. As shown in Figure a, the base metal has a typical three phases microstructure comprised of α 2 + B2 + O, the black granular phase, and the grey acicular phase are α 2 and O phase, respectively, while the substrate is B2 phase . As shown in Figure b, the weld zone features primary B2 phase, whereas the granular α 2 and acicular O phase have almost vanished.…”

Section: Resultsmentioning

confidence: 93%

“…The schematic diagram of LFW process and the appearance of the joint are shown in Figure . The average ultimate tensile strength, yield strength, and elongation of as welded joint are about 1 136 MPa, 1 073 Mpa, and 4.4%, respectively …”

Section: Methodsmentioning

confidence: 99%

“…Consequently, the corrosion resistance of joint may be inferior to that of properly annealed base metal because of microsegregation, precipitation of secondary phases, recrystallization, and grain growth . According to the preliminary study, the phase transformation of Ti 2 AlNb alloy is very sensitive to thermal processing, and the microstructure of LFWed joint have changed drastically as compared to base metal . Therefore, to understand the oxidation mechanism of LFWed joint is crucial for the safety and reliability of aeroengines.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Oxidation Behavior of Three Different Zones of Linear Friction Welded Ti₂AlNb Alloy

Chen

Xie

et al. 2016

Adv Eng Mater

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Linear friction welding is employed to weld a Ti2AlNb-based alloy. The oxidation behavior of three different zones, i.e., base metal, weld zone, and thermo-mechanically affected zone is studied at 800 C exposed to air. The oxidation kinetics of the specimens consist of an initial parabolic kinetic and followed by a linear kinetic. For the base metal, absorption of more oxygen due to higher amount of a 2 phase leads to the thickest oxidation scale, while the preferential formation of Al 2 O 3 for the joint contributes to better oxidation resistance. The presence of AlNbO 4 for all the three zones can be observed after a prolong exposure in air, leading to a drastic acceleration of oxidation rate.

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Section: Resultsmentioning

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Oxidation Behavior of Three Different Zones of Linear Friction Welded Ti₂AlNb Alloy

Chen

Xie

et al. 2016

Adv Eng Mater

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“…Up to now, fusion welding, friction welding, and brazing have been employed for joining Ti 3 Al based alloys or TiAl based alloys. However, defects such as cracks and voids usually appear in the joints obtained by fusion or friction welding, which can lead to hidden dangers in applications [12][13][14]. In brazing, the addition of filler can easily introduce impurities [15][16].…”

Section: Introductionmentioning

confidence: 99%

Diffusion Bonding of Ti2AlNb Alloy and High-Nb-Containing TiAl Alloy: Interfacial Microstructure and Mechanical Properties

Bian

Lei

Wang

et al. 2018

Metals

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In this study, reliable Ti2AlNb/high-Nb-containing TiAl alloy (TAN) joints were achieved by diffusion bonding. The effects of bonding temperature and holding time on the interfacial microstructure and mechanical properties were fully investigated. The interfacial structure of joints bonded at various temperatures and holding times was characterized by scanning electron microscopy (SEM), energy dispersive spectrometer (EDS) and X-ray diffraction (XRD). The results show that the typical microstructure of the Ti2AlNb substrate/O phase/Al(Nb,Ti)2 + Ti3Al/Ti3Al/TAN substrate was obtained at 970 °C for 60 min under a pressure of 5 MPa. The formation of the O phase was earlier than the Al(Nb,Ti)2 phase when bonding temperature was relatively low. When bonding temperature was high enough, the Al(Nb,Ti)2 phase appeared earlier than the O phase. With the increase of bonding temperature and holding time, the Al(Nb,Ti)2 phase decomposed gradually. As the same time, continuous O phase layers became discontinuous and the Ti3Al phase coarsened. The maximum bonding strength of 66.1 MPa was achieved at 970 °C for 120 min.

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“…Despite the significant progress in the processing methods, research studies on the weldability of Ti 2 AlNb-based alloys still remain limited [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

In situ investigation of the tensile deformation of laser welded Ti 2 AlNb joints

Zhang

Lei

et al. 2017

Materials Characterization

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Microstructure evolution and mechanical properties of linear friction welded Ti2AlNb alloy

Cited by 54 publications

References 35 publications

Oxidation Behavior of Three Different Zones of Linear Friction Welded Ti₂AlNb Alloy

Oxidation Behavior of Three Different Zones of Linear Friction Welded Ti₂AlNb Alloy

Diffusion Bonding of Ti2AlNb Alloy and High-Nb-Containing TiAl Alloy: Interfacial Microstructure and Mechanical Properties

In situ investigation of the tensile deformation of laser welded Ti 2 AlNb joints

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Microstructure evolution and mechanical properties of linear friction welded Ti2AlNb alloy

Cited by 54 publications

References 35 publications

Oxidation Behavior of Three Different Zones of Linear Friction Welded Ti2AlNb Alloy

Oxidation Behavior of Three Different Zones of Linear Friction Welded Ti2AlNb Alloy

Diffusion Bonding of Ti2AlNb Alloy and High-Nb-Containing TiAl Alloy: Interfacial Microstructure and Mechanical Properties

In situ investigation of the tensile deformation of laser welded Ti 2 AlNb joints

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Oxidation Behavior of Three Different Zones of Linear Friction Welded Ti₂AlNb Alloy

Oxidation Behavior of Three Different Zones of Linear Friction Welded Ti₂AlNb Alloy