Effect of Post Heat Treatment on the Mechanical Properties of Porous Ti–6Al–4V Alloys Manufactured through Powder Bed Fusion Process

Yue, Xuezheng; Fukazawa, Hiroshi; Maruyama, Kazuya; Matsuo, Keiji; Kitazono, Koichi

doi:10.2320/matertrans.l-m2018846

Cited by 10 publications

(4 citation statements)

References 13 publications

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“…34) On the other hand, porous commercially pure titanium with high ductility shows small stress oscillation. 35) Second is the cell regularity. The stress oscillation becomes small in AM porous aluminum with the disordered cells 30) or a closed-cell aluminum foam with random pore distribution.…”

Section: Compression Behaviors Of Am Porous Almgsc-alloysmentioning

confidence: 99%

Design and Applications of Additively Manufactured Porous Aluminum Alloys

2023

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Additive manufacturing (AM) technology enables to manufacture many types of porous aluminum alloys. Present study focusses on AM porous Al4.8Mg0.7Sc alloys manufactured through laser powder bed fusion process. Eight types of ordered cell structures are designed by 3D-Voronoi division. AM porous Al4.8Mg0.7Sc alloys consisting of ordered cells show anisotropic compression behavior. Oscillated stressstrain curves are due to the heterogeneous deformation of cell struts. Post-annealed AM porous Al4.8Mg0.7Sc alloy shows excellent mechanical properties compared to post-annealed AM porous Al10Si0.3Mg alloy. This is because of solid solution hardening in Al4.8Mg 0.7Sc alloy.

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Section: Compression Behaviors Of Am Porous Almgsc-alloysmentioning

confidence: 99%

Design and Applications of Additively Manufactured Porous Aluminum Alloys

2023

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“…After the 3D-Voronoi division, the ordered cell structure consisting of truncated octahedron unit cells is created. This is called ordered bcc-Voronoi cell [9].…”

Section: Design Of Ordered and Disordered Cell Structuresmentioning

confidence: 99%

Energy Absorption of Additively Manufactured Porous Metals with Disordered Cells

Kitazono

Guo

Zhu

et al. 2021

MSF

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Lightweight porous metals are focused on as energy absorbing materials for automobiles. Open-cell porous metals were manufactured through additive manufacturing process. Their cell structures were designed based on Voronoi diagrams using a commercial 3D-CAD software. Both ordered and disordered cell structures with the same porosities were successfully designed in this study. Compression tests and explicit finite element analysis revealed heterogeneous deformation behaviors in ordered porous metals. On the other hand, the porous metals with disordered cell structure showed relatively isotropic and uniform deformation, which is suitable as energy absorbing materials. Controlling the disordered cell structure designed by 3D-Voronoi diagram enables to develop the advanced porous metals having various mechanical properties.

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“…The corresponding mechanical properties can involve tensile yield stress and ultimate tensile strength (UTS) values ranging from >1 GPa, with elongations (ductility) of 7-8% in contrast to tensile yield stress and UTS values ranging from 0.85 to 0.95 GPa, and elongations of >10% for cast and wrought Ti64 products [5][6][7][8]. In this regard, there have been numerous, recent studies involving post-process SLM and EBM heat treatment schedules which, as a consequence of the Ti64 applications, have produced more uniform and stress-free microstructures with superior mechanical properties; in particular, the raising of the elongation to >15%, nearly double the ductility of the as-fabricated products [9][10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Effects of Postprocess Hot Isostatic Pressing Treatments on the Mechanical Performance of EBM Fabricated TI-6Al-2Sn-4Zr-2Mo

et al. 2020

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An essentially fully acicular alpha-prime martensite within an equiaxed grain structure was produced in an Electron Beam Melting (EBM)-fabricated Ti-6Al-2Sn-4Zr-2Mo (Ti6242) alloy using two different Arcam EBM machines: An A2X system employing tungsten filament thermionic electron emission, and a Q20 system employing LaB6 thermionic electron emission. Post-process Hot Isostatic Pressing (HIP) treatment for 2 h at 850, 950, and 1050 °C resulted in grain refinement and equiaxed grain growth along with alpha-prime martensite decomposition to form an intragranular mixture of acicular martensite and alpha at 850 °C, and acicular alpha phase at 950 and 150 °C, often exhibiting a Widmanstätten (basketweave) structure. The corresponding tensile yield stress and ultimate tensile strength (UTS) associated with the grain growth and acicular alpha evolution decreased from ~1 and ~1.1 GPa, respectively, for the as-fabricated Ti6242 alloy to ~0.8 and 0.9 GPa, respectively, for HIP at 1050 °C. The optimum elongation of ~15–16% occurred for HIP at 850 °C; for both EBM systems. Because of the interactive role played by equiaxed grain growth and the intragrain, acicular alpha microstructures, the hardness varied only by ~7% between 41 and 38 HRC.

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Effect of Post Heat Treatment on the Mechanical Properties of Porous Ti–6Al–4V Alloys Manufactured through Powder Bed Fusion Process

Cited by 10 publications

References 13 publications

Design and Applications of Additively Manufactured Porous Aluminum Alloys

Design and Applications of Additively Manufactured Porous Aluminum Alloys

Energy Absorption of Additively Manufactured Porous Metals with Disordered Cells

Effects of Postprocess Hot Isostatic Pressing Treatments on the Mechanical Performance of EBM Fabricated TI-6Al-2Sn-4Zr-2Mo

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