Phase/grain boundary assisted-3D static globularization mechanism of TC17 alloy based on the microstructure reconstruction and in-situ TEM observation

Pang, Haoyu; Liu, Yingang; Luo, Jiao; Liu, Cong; Li, Hong

doi:10.1016/j.jmst.2023.02.043

Cited by 9 publications

(3 citation statements)

References 57 publications

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“…These quantifications indicated that an increase in the Fe content could significantly refine the size of the α-Ti laths in our alloys. Liquid Ti typically experiences sequential solid-state transformations of liquid → β-Ti phase →α-Ti phase [31] as it cools from high temperatures to room temperature. If there are no β-Ti phase stabilizing elements in the alloy (such as Fe, V, etc.…”

Section: Effects Of Fe On the α/β-Ti Phasesmentioning

confidence: 99%

“…The addition of Fe, as a strong β-Ti stabilizing element, can stabilize the β-Ti phase and thus help to preserve more of the β-Ti phase during the solidification process. More specifically, Fe atoms occupy the substitu- Liquid Ti typically experiences sequential solid-state transformations of liquid → β-Ti phase →α-Ti phase [31] as it cools from high temperatures to room temperature. If there are no β-Ti phase stabilizing elements in the alloy (such as Fe, V, etc.…”

Section: Effects Of Fe On the α/β-Ti Phasesmentioning

confidence: 99%

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Effects of Fe Contents on the Microstructure and Precipitate of Ti–Al–V Alloys Prepared by Direct Energy Deposition

He,

Yang,

Liu

et al. 2024

Metals

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This study investigated the influence of Fe content on the microstructure and mechanical properties of Ti–6Al–4V(TC4) + 25Ti alloys prepared by low-energy-density direct energy deposition (DED) technology. With the incorporation of the Fe elements, the α-Ti phases exhibited significant changes in size and morphology, while the numerous β-Ti phases and some triclinic-Ti precipitates were retained. With the refinement of the α-Ti phase, retainment of the β-Ti phase and the presence of triclinic-Ti precipitates, the mechanical properties of DED samples can be significantly improved compared with DED TC4 alloys. The room-temperature mechanical property tests showed that the ultimate tensile strength (UTS) of 3Fe + TC4 + 25Ti achieved 1298.64 ± 5.26 MPa with an elongation of 4.82% ± 0.20%, and the maximum elongation of 1Fe + TC4 + 25Ti reached 10.82% ± 0.82% with a UTS of 1076.95 ± 11.69 MPa. The strengthening mechanism of DED Ti-Al-V-Fe alloys were further discussed, providing new insights into the microstructure control and the composition design of additive manufacturing of Ti alloys.

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Section: Effects Of Fe On the α/β-Ti Phasesmentioning

confidence: 99%

Section: Effects Of Fe On the α/β-Ti Phasesmentioning

confidence: 99%

Effects of Fe Contents on the Microstructure and Precipitate of Ti–Al–V Alloys Prepared by Direct Energy Deposition

He,

Yang,

Liu

et al. 2024

Metals

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“…Titanium alloys are widely used in aerospace, marine, automotive, and biomedical fields because of their high strength, high temperature resistance, corrosion resistance, non-toxicity, and good weldability [ 1 , 2 ]. With the development of the aerospace, marine and automotive industries in recent years, the requirements for excellent mechanical properties, such as a high strength, high toughness and fatigue resistance, are becoming urgent.…”

Section: Introductionmentioning

confidence: 99%

Effect of Microstructure on High-Speed Tensile Mechanical Properties of Ti-1300 Alloy

Zhang

Liu

2023

Materials

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It is usually required that Ti-1300 alloys be able to withstand a greater load under special conditions, such as the controllable collision of a space shuttle and rapid collision of an automobile. Because of a good combination of strength and toughness, Ti-1300 alloys are widely applied in the aerospace industry. However, during the service process, the alloy components inevitably bear extreme loads. This paper uses high-speed tensile technology to systematically study the effects of different strain rates on the deformation of the microstructure and deformation mechanism of Ti-1300 alloys and to clarify a relation between the microstructure and mechanical properties. The results show that no phase transformation occurs during the high-speed tensile process at strain rates of 200 s−1 and 500 s−1. The deformation mechanism is mainly due to dislocation slip. The fracture mode is ductile fracture at the two strain rates, due to the connection between micro-voids promoted by dislocation slip. The ultimate tensile strengths are 1227 MPa and 1368 MPa, the yield strengths are 1050 MPa and 1220 MPa, and the elongations are 11.3% and 10.4%, respectively. The present results provide theoretical guidance for the further application of metastable β titanium alloys in working environments with high strain rates.

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Effects of recrystallization on interfacial microstructure evolution and shear strength of TiAl alloy joints

Ma,

Tang,

Wang

et al. 2024

Intermetallics

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Phase/grain boundary assisted-3D static globularization mechanism of TC17 alloy based on the microstructure reconstruction and in-situ TEM observation

Cited by 9 publications

References 57 publications

Effects of Fe Contents on the Microstructure and Precipitate of Ti–Al–V Alloys Prepared by Direct Energy Deposition

Effects of Fe Contents on the Microstructure and Precipitate of Ti–Al–V Alloys Prepared by Direct Energy Deposition

Effect of Microstructure on High-Speed Tensile Mechanical Properties of Ti-1300 Alloy

Effects of recrystallization on interfacial microstructure evolution and shear strength of TiAl alloy joints

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