In situ alloying based laser powder bed fusion processing of β Ti–Mo alloy to fabricate functionally graded composites

Duan, Ranxi; Li, Sheng; Cai, Biao; Tao, Zhi; Zhu, Weiwei; Ren, Fuzeng; Attallah, Moataz M.

doi:10.1016/j.compositesb.2021.109059

Cited by 29 publications

(16 citation statements)

References 55 publications

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“…Under the action of metal vapor recoil, typical keyhole characteristics were formed, as schematically depicted in figure 2(d). In this case, the vapor-induced recoil force was able to promote the Marangoni convection within the molten pool, thereby achieving abundant heat and mass transfer [34]. As the laser beam is left, the keyholes would be closed under the driving force of surface tension, thereby finally achieving the complete densification behavior.…”

Section: Forming Qualitymentioning

confidence: 99%

Influence of heat treatment on microstructure, mechanical and corrosion behavior of WE43 alloy fabricated by laser-beam powder bed fusion

Ling,

Li,

Zhang

et al. 2023

Int. J. Extrem. Manuf.

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Magnesium (Mg) alloys are considered to be a new generation of revolutionary medical metals. Laser-beam powder bed fusion (PBF-LB) is suitable for fabricating metal implant with personalized and complicated structure. However, the as-built part usually exhibits undesirable microstructure and unsatisfied performance. In this work, WE43 parts were firstly fabricated by PBF-LB and then subjected to heat treatment. Although high densification rate of 99.91% was achieved using suitable processes, the as-built parts exhibited anisotropic and layered microstructure with heterogeneously precipitated Nd-rich intermetallic. After heat treatment, fine and nano-scaled Mg24Y5 particles were precipitated. Meanwhile, the α-Mg grains undergone recrystallization and turned coarsened slightly, which effectively weakened the texture intensity and reduced the anisotropy. As a consequence, the YS and UTS were significantly improved to 250.2 ± 3.5 MPa and 312 ± 3.7 MPa, respectively, while the elongation still maintained at high level of 15.2%. Furthermore, the homogenized microstructure reduced the tendency of localized corrosion, and promoted the development of uniform passivation film. Thus, the degradation rate of WE43 parts was reduced by an order of magnitude. Besides, in-vitro cell experiments proved its favorable biocompatibility.

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Section: Forming Qualitymentioning

confidence: 99%

Influence of heat treatment on microstructure, mechanical and corrosion behavior of WE43 alloy fabricated by laser-beam powder bed fusion

Ling,

Li,

Zhang

et al. 2023

Int. J. Extrem. Manuf.

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“…Until now, attempts to fabricate Ti-Mo alloys using additive manufacturing have generally employed selective laser melting (SLM) of either prealloyed powders or blended elemental powders. [16][17][18][19] Recently, cost-effective approaches employing blended elemental powders utilizing methods such as ball milling, simple powder blending, and satellite mixing have been used for AM of Ti-based materials with promising results. [20][21][22] The current work also aims to study the AM of Ti-xMo alloys with 5 and 10 wt% Mo using a low-cost elemental powder blending approach in conjunction with laser engineered net shaping (LENS).…”

Section: Introductionmentioning

confidence: 99%

Laser Additive Manufacturing of Low‐Cost Ti–Mo Alloys: Microstructural Evolution, Phase Analysis, and Mechanical Properties

et al. 2022

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Design and fabrication of low‐cost biomedical Ti alloys has recently received considerable attention. Herein, additive manufacturing employing laser engineered net shaping (LENS) is used to fabricate low‐cost Ti–5wt%Mo and Ti–10wt%Mo alloys from mixed elemental powders, and the resulting features are studied and compared with those of LENS‐produced commercially pure Ti (CP‐Ti). Optimization of the processing parameters shows that, on increasing Mo, densification is slightly reduced. Phase analysis and microstructural investigations on the Ti–Mo alloys show strong dependency on the level of Mo additions. CP‐Ti sample exhibits an α phase microstructure with mainly coarse and some fine plate‐like features, whereas addition of 5% Mo results in a mixture of acicular α′ distributed within β phase grains. Addition of 10% Mo stabilizes the β phase, while minor peaks indicating the presence of some ω phase are detected by X‐ray phase analysis. Mechanical characterization reveals that Ti–10%Mo has the lowest elastic modulus due to its dominant β phase structure as well as the highest microhardness and yield strength due to solid‐solution strengthening effects from Mo and the presence of the nanoscale ω phase. However, the presence of the ω phase and the slightly lower densification also reduce the deformation strain in comparison to the Ti–5%Mo and CP‐Ti.

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“…Practically, powder feedstocks can readily be changed between runs or mixed in-situ during the build process. Research interest is growing in developing functionally graded materials [1], high-entropy alloys [2] and new lightweight, printable alloys [3]. Nonetheless, only a relatively narrow palette of materials is widely used for processing today.…”

Section: Introductionmentioning

confidence: 99%

Accelerating Alloy Development for Laser Powder Bed Fusion through In-situ Process Monitoring

J.Williams¹,

Sing²

2022

Asian Society for Precision Engineering and Nanotechnology (ASPEN 2022)

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In situ alloying based laser powder bed fusion processing of β Ti–Mo alloy to fabricate functionally graded composites

Cited by 29 publications

References 55 publications

Influence of heat treatment on microstructure, mechanical and corrosion behavior of WE43 alloy fabricated by laser-beam powder bed fusion

Influence of heat treatment on microstructure, mechanical and corrosion behavior of WE43 alloy fabricated by laser-beam powder bed fusion

Laser Additive Manufacturing of Low‐Cost Ti–Mo Alloys: Microstructural Evolution, Phase Analysis, and Mechanical Properties

Accelerating Alloy Development for Laser Powder Bed Fusion through In-situ Process Monitoring

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