Improvement of microstructure, mechanical and corrosion properties of biomedical Ti-Mn alloys by Mo addition

Santos, Pedro Fernandes; Niinomi, Mitsuo; Liu, Huihong; Cho, Ken; Nakai, Masaaki; Trenggono, Adhitya; Champagne, Sébastien; Hermawan, Hendra; Narushima, Takayuki

doi:10.1016/j.matdes.2016.07.115

Cited by 58 publications

(35 citation statements)

References 35 publications

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“…The D gr of the TMM alloys fabricated by MIM is much smaller than that of the TMM alloys fabricated by CCLM 23) , and also smaller than that of Ti-Mn alloys fabricated by MIM 21) . A number of factors contribute to this smaller grain size observed in TMM alloys fabricated by MIM.…”

Section: Microstructurementioning

confidence: 77%

“…Because of the inhibition of the formation of the ω phase (especially in TMM-53 and TMM-54, which would be expected to show a higher E), the TMM alloys fabricated by MIM have similar E (84-88 GPa), with TMM-54 showing the lowest E among them. Further, compared to the TMM alloys fabricated by CCLM 23) , the amount of athermal ω phase is lower for all alloys fabricated by MIM, leading to lower Young s moduli. The presence of pores causes E to decrease 41) .…”

Section: Mechanical Propertiesmentioning

confidence: 86%

“…5(a), (b), (c), and (d)) 33,34) , indicating that the amount of athermal ω phase decreases with increasing Mn content. Furthermore, the intensity of the ω phase re ections appear weaker in the SAED patterns of the TMM alloys fabricated by MIM than in the SAED patterns of the TMM alloys fabricated by CCLM 23) . This is because higher O contents will inhibit the formation of the ω phase 35) .…”

Section: Microstructurementioning

confidence: 87%

“…Nevertheless, the ductility of the alloys warrants improvement 19,21) . In another recent study, Mo was added as an alloying element to Ti-Mn alloys fabricated by CCLM in order to improve their ductility and the balance of their mechanical properties 23) . Ti-Mn-Mo (TMM) alloys show improved balance in their mechanical properties, and some alloys which show signi cant {332}<113> mechanical twinning showed signicant improvement in their ductility by twinning-induced plasticity (TWIP) 23) .…”

Section: Introductionmentioning

confidence: 99%

“…Ti-Mn-Mo (TMM) alloys show improved balance in their mechanical properties, and some alloys which show signi cant {332}<113> mechanical twinning showed signicant improvement in their ductility by twinning-induced plasticity (TWIP) 23) . Some other merits of Mo addition to Ti-Mn systems, including improved corrosion properties, were also discussed 23) . Compared to Ti-Mn alloys fabricated by CCLM 19) , fabrication by MIM introduces pores, carbides, and high interstitial impurity contents, which cause a drastic reduction in the tensile ductility of the Ti-Mn alloys 21) .…”

Section: Introductionmentioning

confidence: 99%

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Effects of Mo Addition on the Mechanical Properties and Microstructures of Ti-Mn Alloys Fabricated by Metal Injection Molding for Biomedical Applications

et al. 2017

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Ti-Mn alloys fabricated by metal injection molding (MIM) show promising performance for biomedical applications, but their low ductility (caused by high O content and the presence of pores and carbides) requires improvement. Previously, the addition of Mo to cold crucible levitation melted (CCLM) Ti-Mn alloys ef ciently improved the ductility of those alloys by promoting mechanical twinning. In the present study, Mo was added to Ti-Mn alloys fabricated by MIM. Unlike fabrication by CCLM, fabrication by MIM can produce alloys with a smaller grain size, and also introduce microstructures such as pores and Ti carbides. Thus, in order to investigate how Mo addition interacts with these typical MIM features, four alloys for biomedical applications were fabricated by MIM: Ti-5Mn-3Mo (TMM-53), Ti-5Mn-4Mo (TMM-54), Ti6Mn-3Mo (TMM-63), and Ti-6Mn-4Mo (TMM-64). Their microstructures, mechanical properties, and tensile deformation mechanisms were evaluated. Their hardness values range from 312-359 HV, and their Young s modulus values range from 84-88 GPa; both the Vickers hardness and Young s modulus show little variation among the alloys. Although the alloys show fracture features associated with a predominantly ductile fracture mode and Mo addition successfully promotes mechanical twinning in TMM-54, the elongation of these alloys is still critically low. Compared to the TMM alloys fabricated by CCLM, the TMM alloys fabricated by MIM show slightly lower hardness and Young s modulus, and comparable tensile strength, with their low elongation remaining inadequate for such applications. In particular, TMM-63 shows the best combination of mechanical properties among the present alloys, with an elongation of 4% and an ultimate tensile strength of 1145 MPa.

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Section: Microstructurementioning

confidence: 77%

Section: Mechanical Propertiesmentioning

confidence: 86%

Section: Microstructurementioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Mo Addition on the Mechanical Properties and Microstructures of Ti-Mn Alloys Fabricated by Metal Injection Molding for Biomedical Applications

et al. 2017

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A Review on Biomedical Titanium Alloys: Recent Progress and Prospect

2019

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Compared with stainless steel and Co-Cr-based alloys, Ti and its alloys are widely used as biomedical implants due to many fascinating properties, such as superior mechanical properties, strong corrosion resistance, and excellent biocompatibility. After briefly introducing several most commonly used biomedical materials, this article reviews the recent development in Ti alloys and their biomedical applications, especially the low-modulus β-type Ti alloys and their design methods. This review also systemically investigates the recently attractive progress in preparation of biomedical Ti alloys, including additive manufacturing, porous powder metallurgy, and severe plastic deformation, applied in the manufacturing and the influenced microstructures and properties. Nevertheless, there are still some problems with the long-term performance of Ti alloys, and therefore several surface modification methods are reviewed to further improve their biological activity, wear resistance, and corrosion resistance. Finally, the biocompatibility of Ti and its alloys is concluded. Summarizing the findings from literature, future prediction is also conducted. Darmstadt. His current research interest is focusing on the metal additive manufacturing (e.g. selective laser melting, electron beam melting), titanium alloys and composites, and processing-microstructure-properties in high-performance materials.

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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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Improvement of microstructure, mechanical and corrosion properties of biomedical Ti-Mn alloys by Mo addition

Cited by 58 publications

References 35 publications

Effects of Mo Addition on the Mechanical Properties and Microstructures of Ti-Mn Alloys Fabricated by Metal Injection Molding for Biomedical Applications

Effects of Mo Addition on the Mechanical Properties and Microstructures of Ti-Mn Alloys Fabricated by Metal Injection Molding for Biomedical Applications

A Review on Biomedical Titanium Alloys: Recent Progress and Prospect

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

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