Effect of HIP Treatment on Fatigue Notch Sensitivity of Ti–6Al–4V Alloy Fabricated by Electron Beam Melting

Sun, Tao; Liu, Yan; Li, Shujun; Li, Jianping

doi:10.1007/s40195-018-0850-1

Cited by 10 publications

(4 citation statements)

References 31 publications

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“…Additive manufacturing (AM) technique, which allows layer-by-layer building of complex functional parts designed in a 3D model, shows great promise in the construction of aerospace components and medical devices [2][3][4]. Electron beam melting (EBM) is one of the powder bed AM techniques that utilize electron beam as heating source and has been extensively studied for Ti64 alloy [5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Orientation Dependence of the Micro-Pillar Compression Strength in an Electron Beam Melted Ti–6Al–4V Alloy

Tian

Yan

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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An α/β two-phase Ti-6Al-4V alloy was fabricated by electron beam melting to obtain a basketweave structure. The orientation dependence of the mechanical properties of Ti-6Al-4V alloy was studied by micro-pillar compression and post-mortem transmission electron microscopy analysis. The results indicate that different grains have different mechanical responses, and the possible attributions were discussed. Besides the orientation effect, due to the limited volumes of micropillars, the size of the α phases, dispersion of the β phases, and the presence of the free dislocation path also affect the mechanical properties of the micropillars to a large extent. Although no direct link was discovered between the mechanical properties and the parent β orientations, this work provided a promising method to further study the anisotropic mechanical behavior in Ti-6Al-4V alloy.

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Section: Introductionmentioning

confidence: 99%

Orientation Dependence of the Micro-Pillar Compression Strength in an Electron Beam Melted Ti–6Al–4V Alloy

Tian

Yan

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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“…The diffraction spots show that the alloy is composed of β matrix and α precipitation phase. Different from the α phase of TC21-5V alloy obtained by diffusion couple, there is no obvious variant selection of α phase (distributed at a certain angle), because a large number of defects (dislocation, sub grain boundary, etc) are introduced into the alloy during forging [19,20]. Finer acicular α structure can be seen after aging at lower temperatures (500°C, figure 6(b)) because lower temperatures produce greater degree of under cooling, which provides greater nucleation driving force for α phase precipitation.…”

Section: Microstructure and Mechanical Properties Of Forged Tc21-5v Amentioning

confidence: 99%

Design of high strength titanium alloy through finding a critical composition with ultra-fine α phase

Zhang

Zhou

Wang

et al. 2020

Mater. Res. Express

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This study presents the design of a high strength titanium alloy based on the idea that the β titanium alloy with critically stable composition could precipitate ultra-fine α phase. An efficient method was used to find the composition of TC21-xV alloy in which ultra-fine α phase could be obtained. It is found that TC21-5V alloy containing ultra-fine α phase and possessing highest hardness could be obtained after solution treatment in the β single-phase region and subsequent aging. The morphology of primary and secondary α phases can be controlled by changing the solution treatment and aging temperatures. Calculation results of driving force and growth rate of secondary α phase show that the growth rate may be a decisive factor for the final size of secondary α phase after solution and aging treatments in the two-phase region. Finally, when the alloy was solution treated at 820°C and aged at 500°C, the highest strength of 1540 MPa was obtained. The alloy was solution treated at 820°C and aged at 600°C exhibited high strength of 1210 MPa with 11.4% elongation.

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“…Due to the combination of high strength [1], low density [2] and excellent corrosion resistance [3], titanium alloys are used in many industrial applications such as aeronautics. The intensive use of these alloys requires the control of a panel of properties that can be changed by manufacturing and joining processes.…”

Section: Introductionmentioning

confidence: 99%

Unveiling the Residual Stresses, Local Micromechanical Properties and Crystallographic Texture in a Ti-6Al-4V Weld Joint

Mehdi

Badji

et al. 2021

Acta Metall. Sin. (Engl. Lett.)

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In this work, the micromechanical properties, crystallographic texture, welding residual stresses and their evolution after plastic strain were investigated in a Ti-6Al-4 V alloy tungsten inert gas weld joint. It was found that the welding process affected the Young modulus and microhardness values in both α and β phases in the different regions of the weld joint. The highest microhardness and Young modulus values of α phase were recorded in the heat-affected zone, whereas the highest values of these characteristics for the β phase were found in the fusion zone (FZ). The change in the micromechanical properties was accompanied by a change in the crystallographic texture components of the dominant α phase from (0001) < 10-10 > and (11-20) < 10-10 > components in the base material to (10-10) < 11-20 > and (11-20) < 3-302 > components in the FZ. The introduction of tensile testing resulted in a continuous stress relaxation and improved the weld joint performances.

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Effect of HIP Treatment on Fatigue Notch Sensitivity of Ti–6Al–4V Alloy Fabricated by Electron Beam Melting

Cited by 10 publications

References 31 publications

Orientation Dependence of the Micro-Pillar Compression Strength in an Electron Beam Melted Ti–6Al–4V Alloy

Orientation Dependence of the Micro-Pillar Compression Strength in an Electron Beam Melted Ti–6Al–4V Alloy

Design of high strength titanium alloy through finding a critical composition with ultra-fine α phase

Unveiling the Residual Stresses, Local Micromechanical Properties and Crystallographic Texture in a Ti-6Al-4V Weld Joint

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