Deformation behavior and microstructure evolution in thermal-aided mesoforming of titanium dental abutment

Meng, Bao; Fu, Ming; Shi, San-Qiang

doi:10.1016/j.matdes.2015.10.105

Cited by 27 publications

(9 citation statements)

References 42 publications

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“…Meng et al 18 manufactured a multi-level flanged part is produced via progressive micro extrusion and blanking and investigated the effect of grain size on the microstructure evolution and fracture behaviors in progressive micro forming. Meng et al 19 also investigated the microstructure evolution of commercially pure titanium in thermal-aided meso forming of a dental abutment. The surface grains on the square extrudate generate an equiaxed structure because of severe deformation, reflecting that meso forming at elevated temperature facilitates the homogenization of material flow without coarsening grain size.…”

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confidence: 99%

Interactive effect of microstructure and cavity dimension on filling behavior in micro coining of pure nickel

Wang

et al. 2016

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In this study, interactive effects of microstructure and cavity dimension on the filling behaviors in micro coining were investigated. The results indicate that the filling ability is dependent on both the cavity width t and the ratio of cavity width to grain size t/d strongly. The critical ratio t/d for the worst filling ability increases with cavity width t and tends to disappear when the cavity width t increases to 300 μm. A polycrystalline filling model considering the friction size effect, effect of constrained grains by the tools, grain size, cavity width and ratio of cavity width to grain size is proposed to reveal the filling size effect in micro coining. A quasi in-situ Electron Backscatter Diffraction (EBSD) method is proposed to investigate filling mechanism in micro coining. When several grains across the cavity width, each grain deforms heterogeneously to ordinate the deformation compatibility. When there is only one grain across the cavity width, the grain is fragmented into several smaller grains with certain prolongation along the extrusion direction to coordinate the deformation in the cavity. This is different from the understandings before. Then the filling deformation mechanism is revealed by a proposed model considering the plastic flow in micro coining.

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confidence: 99%

Interactive effect of microstructure and cavity dimension on filling behavior in micro coining of pure nickel

Wang

et al. 2016

Sci Rep

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“…To demonstrate the efficiency of the triblock epoxylated sulfobetaine copolymers in practical usage, we surface-modified a dental root (titanium metal) and a surgery scalpel (stainless steel metal). Titanium root is used as a dental implant for its excellent mechanical properties and overall fair hemocompatibility. , It is directly in contact with the mandible bone and the surrounding muscle cells. To prevent potential infection arising from uncontrolled cell–metal interactions or biofilm formation, the implanted root should ideally resist biofouling.…”

Section: Resultsmentioning

confidence: 99%

“…Metals have always been frequently utilized in biomedical materials designs, for their chemical and physical properties. For example, stainless steel, titanium, and titanium alloys are largely utilized as dental or orthopedics biomaterials. , Stainless steel is easy to process at a relatively low cost, and is commonly utilized as surgical and orthopedic implant materials, as well as in pulmonary stents, screws, or artery stents. , Titanium and titanium alloys are utilized in dental applications for their corrosion resistance, biocompatibility, relatively low modulus of elasticity, and notably light weight. , Besides, they have also been used in various artificial implant body parts such as joints and fingers, as well as in pacemakers or heart valves. In summary, stainless steel and titanium are widely utilized for as biomataerials in vivo . , However, for chronic usage (e.g., cardiovascular devices), titanium and stainless steel are sensitive to protein adsorption and cell attachment, which can induce foreign body responses such as thrombosis orthromboembolism.…”

Section: Introductionmentioning

confidence: 99%

Epoxylated Zwitterionic Triblock Copolymers Grafted onto Metallic Surfaces for General Biofouling Mitigation

et al. 2017

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Titanium and stainless steel materials are widely used in numerous devices or in custom parts for their excellent mechanical properties. However, their lack of biocompatibility seriously limits their usage in the biomedical field. This study focuses on the grafting of triblock copolymers on titanium and stainless steel metal susbtrates for improving their general biofouling resistance. The series of copolymers that we designed is composed of two blocks of zwitterionic sulfobetaine (SBMA) monomers and one block of glycidyl methacrylate (GMA). The number of repeat units forming each block, n, was finely tuned and controlled to 25, 50, 75, or 100, permitting regulation of the grafting thickness, the morphology, and the dependent properties such as the surface hydrophilicity and biofouling resistance. It was shown that the copolymer possessing n = 50 repeat units in each block, corresponding to a molecular weight of about 15.2 kDa, led to the best nonfouling properties, assessed using plasma proteins, blood cells, fibroblasts cells, and various bacteria. This was explained by an optimized grafting degree and chain organization of the copolymer. Lower value (n = 25) and higher values (n = 75, 100) led to low surface coverage and the formation of aggregates, respectively. The best copolymer was grafted onto scalpels (steel) and dental roots (titanium), and antifouling properties demonstrated using Escherichia coli and HT1080 cells. Results of this work show that this unique triblock copolymer holds promise as a potential material for surface modification of biomedical metallic devices, provided a fine-tuning of the blocks organization and length.

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“…Titanium and its alloys, e.g., Ti-6Al-4V, are attractive structural materials in the aerospace, chemical, and biomedical industries due to their unique high strength-weight ratios maintained at elevated temperatures and their exceptional corrosion resistance. In recent years, Ti-6Al-4V alloys have been often selected to manufacture multilayer-structured complex-shaped components via superplastic forming or diffusional bonding [1][2][3]. For these reasons, Ti-6Al-4V alloys have been extensively studied in terms of superplastic flow behaviors and the related deformation mechanism.…”

Section: Introductionmentioning

confidence: 99%

Superplastic Deformation Behaviors and Power Dissipation Rate for Fine-Grained Ti-6Al-4V Titanium Alloy Processed by Direct Rolling

et al. 2022

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Fine-grained Ti-6Al-4V titanium alloy plates were manufactured using a direct rolling approach, and a series of superplastic tensile tests were conducted at varying temperatures and strain rates. The maximum tensile elongation of 816% was obtained at 810 °C and 5 × 10−4 s−1, and the superplastic flow behavior was dominated by a strain-induced grain boundary slip. In addition, the superplastic behaviors of the alloy were investigated, and the α-and β-phase Gibbs free energy was calculated. The vital role of phase β in the transformation was discussed from a thermodynamical perspective. A power dissipation rate model of Ti-6Al-4V during the superplastic deformation was built and used to predict the energy changing laws in the dynamic recrystallization and grain boundary sliding during the superplastic deformation.

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Deformation behavior and microstructure evolution in thermal-aided mesoforming of titanium dental abutment

Cited by 27 publications

References 42 publications

Interactive effect of microstructure and cavity dimension on filling behavior in micro coining of pure nickel

Interactive effect of microstructure and cavity dimension on filling behavior in micro coining of pure nickel

Epoxylated Zwitterionic Triblock Copolymers Grafted onto Metallic Surfaces for General Biofouling Mitigation

Superplastic Deformation Behaviors and Power Dissipation Rate for Fine-Grained Ti-6Al-4V Titanium Alloy Processed by Direct Rolling

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