Investigation into the microstructure and dynamic compressive properties of selective laser melted Ti–6Al–4V alloy with different heating treatments

Liu, Yang; Xu, Huaizhong; Zhu, Lei; Wang, Xiaofeng; Han, Quanquan; Li, Shuxin; Wang, Yonggang; Setchi, Rossitza; Wang, Di

doi:10.1016/j.msea.2020.140561

Cited by 39 publications

(17 citation statements)

References 42 publications

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“…The inverse pole-figure obtained via electron backscatter detection (EBSD), shown in the middle column of Figure 2 , presents needle-shaped textures, indicating the existence of acicular α martensite [ 26 , 27 ]. The size of acicular α martensite for all three samples is almost the same, with an average grain width of 1.9–2.0 μm and a length of 10–100 µm.…”

Section: Materials Manufacturing and Characterizationmentioning

confidence: 99%

Effect of Porosity on Dynamic Response of Additive Manufacturing Ti-6Al-4V Alloys

Cui

Cai

et al. 2022

Micromachines

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Additive manufacturing is a rapidly developing manufacturing technology of great potential for applications. One of the merits of AM is that the microstructure of manufactured materials can be actively controlled to meet engineering requirements. In this work, three types of Ti-6Al-4V (TC4) materials with different porosities are manufactured using selective laser melting using different printing parameters. Their dynamic behaviors are then studied by planar impact experiments based on the free-surface velocity measurements and shock-recovery characterizations. Experimental results indicate that the porosity significantly affects their dynamic response, including not only the yield, but also spall behaviors. With the increasing porosity, the Hugoniot elastic limit and spall strength decrease monotonically. In the case of TC4 of a large porosity, it behaves similar to energy-absorbing materials, in which the voids collapse under shock compression and then the spallation takes place.

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Section: Materials Manufacturing and Characterizationmentioning

confidence: 99%

Effect of Porosity on Dynamic Response of Additive Manufacturing Ti-6Al-4V Alloys

Cui

Cai

et al. 2022

Micromachines

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“…The α 0 martensite of the titanium alloy is hexagonal close packed (HCP) crystal structure and very brittle, thus these fine α 0 martensite phases in the alloys enhance the strength significantly. [15,29] On the other side of the coin, the presence of α 0 martensite caused the low plastic deformation capacity in the alloy, and only 4% reduction of area (PRA) in the AS-XY and 15% in the AS-XZ. Meanwhile, the high cooling rate and the repeated heating during the SLM process also caused extremely high residual internal stresses in the as-built alloy and the highest strength.…”

Section: Tensile Properties Of the Slm-formed And Annealed Alloysmentioning

confidence: 99%

Effect of Microstructural and Textural Anisotropy on the Tensile Properties of Selective Laser Melted and Annealed Ti6Al4VE Alloy

Liu

Zhang

et al. 2022

Adv Eng Mater

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The effect of texture on the anisotropy of tensile properties of the SLM‐formed and annealed Ti6Al4VE alloy is investigated. The component of microstructure in these alloys is dominated by the α/α′ phase. Furthermore, there is a significant difference in the intensity of X‐ray diffraction peaks between the XY plane that is perpendicular to the build direction (BD) and the XZ plane that is parallel to the BD, though alloys are annealed with the same treatment. Ultimate tensile strength and yield strength in the X direction are higher than in the Z direction and exhibit significant anisotropy in the alloy annealed with the same treatment conditions, but the plasticity presents an opposite trend. The average Schmid factor of the basal <α>, prismatic <α>, and pyramidal slip systems in the alloy is analyzed by electron backscatter diffraction and presents that the prismatic <α> slip is the main deformation mode during the tensile testing. The <0001> fiber texture parallel to the loading direction in the XY plane is stronger than that in the XZ plane and causes a decrease in the number of the basal <α> slip system activating in the XY plane in contrast to the XZ plane.

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“…There are plenty of PBF‐L alloys having a cellular structure where the dislocations are accumulated along the cellular structure boundary, such as PBF‐L 306L, PBF‐L Al12Si, PBF‐L AlMg10Si, PBF‐L CCM alloys, and PBF‐L AgCu alloys. [ 125–132 ] In such cases, the length scale of the cellular structures ( s ) controls the overall strengthening level. Then the dislocation strengthening due to dislocation cell walls can be given as [ 133 ]

Δ σ_{cellular} = k_{normald} / \sqrt{s}

where k d is the dislocation strengthening coefficient for the cellular structure.…”

Section: Strengthening Mechanismsmentioning

confidence: 99%

Additive Manufacturing of Aluminum‐Based Metal Matrix Composites—A Review

et al. 2021

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Aluminum metal matrix composites (AMMCs) offer the potential to combine the advantages of both the aluminum alloys (low density and high ductility) and the reinforcements (high strength and high elastic modulus [EM]), therefore show superior specific strength, high specific stiffness, low coefficient of thermal expansion (CTE), and outstanding wear resistance. [1,2] Therefore, AMMCs meet the rapidly growing demand of advanced lightweight materials in many industrial areas such as automotive, aerospace, marine, and military. Traditionally, AMMCs are produced by two processing routes: melt processing or powder metallurgy. Although such composites are already in use in the aerospace and automobile sectors, many challenges in both melt and powder metallurgy processing routes prevent their widespread applications. The main challenges associated with the melt processing route are heterogeneous distribution of reinforcement leading to aggregation (due to the poor wettability of reinforcement), detrimental reactions at the interface (due to the high temperature of melt and a long dwell time of reinforcement in the melt), and difficulty in subsequent machining (due to the presence of hard second-phase particles). On the contrary, powder metallurgy processed AMMCs are prone to high levels of porosity and inferior mechanical properties leading to premature failure of the components. [3][4][5][6][7] In this context, additive manufacturing (AM) methods such as laser-based powder bed fusion (PBF-L), electron beam-based

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Investigation into the microstructure and dynamic compressive properties of selective laser melted Ti–6Al–4V alloy with different heating treatments

Cited by 39 publications

References 42 publications

Effect of Porosity on Dynamic Response of Additive Manufacturing Ti-6Al-4V Alloys

Effect of Porosity on Dynamic Response of Additive Manufacturing Ti-6Al-4V Alloys

Effect of Microstructural and Textural Anisotropy on the Tensile Properties of Selective Laser Melted and Annealed Ti6Al4VE Alloy

Additive Manufacturing of Aluminum‐Based Metal Matrix Composites—A Review

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