Single Titanium Research Articles

Revealing the martensitic variant selection in metastable beta titanium alloy Ti–10V–2Fe–3Al under heterogeneous deformation

As an important deformation mode for the mechanical responses of titanium (Ti) alloys, the martensitic transformation has earned enormous interest, for example, the variant selection, under macro uniaxial stress by tension or compression. However, the variant selection under small-scale deformation with a complex loading condition was rarely reported. In the present study, the small-scale deformation of metastable beta Ti alloy was investigated using nanoindentation combined with the transmission electron microscope (TEM) observation. Different martensitic variants were detected under the complex strain/stress field given by the indenter in the single titanium crystal, which was well interpreted by the Schmid factor (SF) and interaction work (IW) criterion, with the assistance of finite element (FE) simulation. The same prediction given by SF and IW comes from the truth that SF for simple shear is a special case of the IW criterion.

Porous single crystalline-like titanium dioxide monolith with enhanced photoelectrochemical performance

Macro-sized porous single crystalline-like (PSC-like) TiO2 is endowed with unique structural advantages due to its structural consistency and porosity in a large area, which would significantly enhance its photoelectrochemical function. However, there are significant technical challenges in the growth of porous single crystalline-like monoliths. The consistency of structure dominates the structure so that the grain boundary is reduced to the minimum, which is in contradiction with the three-dimensional percolation structure. Here we report a lattice reconstruction strategy based on solid-solid transformation to grow porous single crystal-like anatase TiO2 dominated by (200) and (101) facets at 2 cm scale. In comparison with the traditional definition of porous single crystal, it has two different lattice orientations, but still has good photoelectrochemical properties. The band gap engineering introduces Ti3+ gap into the lattice to generate TinO2n−1 with Magneli phase, limiting the created active structure to the lattice with two-dimensional surface, which would open a new avenue to create highly active surfaces to capture photons and transport electrons stably. The PSC-like TinO2n−1 provides enhanced exciton lifetime (3–5 ns) as a photocatalytic catalyst and shows significant visible light absorption. The independent PSC-like TinO2n−1 delivers high photocurrent of 1.8–5.5 mA · cm−2 at room temperature and does not decay for 10 h.

Gas sensing properties of mixtures of copper and titanium oxides thin films

The subject of the current studies were mixtures of copper and titanium oxide thin films,with various elemental compositions, deposited by magnetron sputtering and annealed in the postprocess.The effect of elemental composition and annealing temperature on the morphology of thinfilms was determined using scanning electron microscope images. The crystal structure and chemicalcomposition of copper‒titanium oxide (CuTi)Ox mixtures were investigated by X-ray diffraction.Hydrogen gas sensing experiments were performed for hydrogen with concentrations ranging from 100to 1,000 ppm. The resistance of the prepared (CuTi)Ox mixtures increased during hydrogen exposure,demonstrating the applicability of these oxides in hydrogen sensing. In addition, better sensor responseswere obtained for the mixtures in comparison to single copper oxides or titanium oxides. Mixturesof copper oxides and titanium oxides may be promising materials for hydrogen sensor applications.Keywords: mixtures of copper and titanium oxides, hydrogen gas sensors, mixed copper and titaniumoxides, thin films, magnetron sputtering

Role of structural hierarchy on mechanics and electrochemistry of wire arc additive manufactured (WAAM) single phase titanium

The absence of understanding of correlations between structure, mechanics, and electrochemical behavior in single-phase additive-manufactured titanium components impedes the advancement of large-scale processing. The present study addresses this scientific knowledge gap by investigating the evolution of structural hierarchy and its impact on the hardness and corrosion resistance of wire arc additive manufactured (WAAM) commercially pure titanium (cp-Ti) along three mutually orthogonal deposition directions. Integrated X-ray diffraction and optical microscopy revealed that a single-phase α-Ti monolithic structure is devoid of observable deposition tracks and interfaces with traces of titanium oxide. Homogeneous nucleation in the single phase at low undercooling and slow solidification rates during WAAM resulted in coarse grains of size 1 mm. The grains are randomly oriented with slight preferential texture along the hexagonal close-packed basal {0001} planes due to their parallel orientation with the close-packed body-centered cubic {011} plane during the β – α phase transition. The single-phase structure results in a uniform distribution of microhardness along layer-by-layer buildup direction and the bulk with an average of 1.6 GPa, which is about 80 % of conventionally cast cp-Ti. An increased dislocation density at the surface and from thermal strain during WAAM enhances nanohardness to 3.0 GPa. The absence of galvanic potential difference between two adjacent grains and the coarse size imparts high corrosion resistance with a rate of 80 × 10−5 mm per year, less than 50 % of other additive-manufactured titanium alloys. Overall, this study advances the state-of-the-art in homogenous, single-phase WAAM processing as a potential large-sale additive manufacturing alternative to conventionally processed Ti components.

Photo-scanning Electrochemical Microscopy Observation of Overall Water Splitting at a Single Aluminum-Doped Strontium Titanium Oxide Microcrystal

Particulate photocatalysts for the overall water splitting (OWS) reaction offer promise as devices for hydrogen fuel generation. Even though such photocatalysts have been studied for nearly 5 decades, much of the understanding of their function is derived from observations of catalyst ensembles and macroscopic photoelectrodes. This is because the sub-micrometer size of most OWS photocatalysts makes spatially resolved measurements of their local reactivity very difficult. Here, we employ photo-scanning electrochemical microscopy (photo-SECM) to quantitatively measure hydrogen and oxygen evolution at individual OWS photocatalyst particles for the first time. Micrometer-sized Al-doped SrTiO3/Rh2-yCryO3 photocatalyst particles were immobilized on a glass substrate and interrogated with a chemically modified SECM nanotip. The tip simultaneously served as a light guide to illuminate the photocatalyst and as an electrochemical nanoprobe to observe oxygen and hydrogen fluxes from the OWS. Local O2 and H2 fluxes obtained from chopped light experiments and photo-SECM approach curves using a COMSOL Multiphysics finite-element model confirmed stoichiometric H2/O2 evolution of 9.3/4.6 μmol cm-2 h-1 with no observable lag during chopped illumination cycles. Additionally, photoelectrochemical experiments on a single microcrystal attached to a nanoelectrode tip revealed a strong light intensity dependence of the OWS reaction. These results provide the first confirmation of OWS at single micrometer-sized photocatalyst particles. The developed experimental approach is an important step toward assessing the activity of photocatalyst particles at the nanometer scale.

Peristaltic pumping of hybrid nanofluids through an inclined asymmetric channel: A biomedical application

This analysis addresses the application of highly effective nanomaterials namely single walled carbon nanotubes, copper dioxide and titanium dioxide in medical field from different aspects. The nanomaterials are brought into consideration with aiming to focus heat transfer enhancement of base liquid. Further the characteristics of nanomaterials are compared in terms of single phase nanofluid and hybrid nanofluid models. This inspiration leads to mathematical modeling of the problem subjected to Sorret and Dufur effects. Convection phenomenon is used to investigate heat transfer at the walls of channel. The mathematical formulation has been performed in asymmetric inclined channel. The equations are simplified by using small Reynolds number and long wavelength estimation. The governing equations with associated boundary conditions are solved via Mathematica software. The non-dimensional variables appeared in equations are discussed against velocity, temperature, concentration, streamline, skin friction, Nusselt number and Sherwood number. The results are compared for single phase nanoliquid (SWCNTs+water) and hybrid nanofluid (Cu+TiO2) models against physical variables. Hybrid nanofluid model leads higher temperature against inclination angle and Dufur number. Opposite trend is noted for mass transport against Sorret number. Furthermore, heat transfer in case of hybrid nanofluid model is noted higher than single phase nanoliquid model. The considered nanomaterials could be useful to boost heat transfer rate for targeted maligned tissues. The current study will help researchers to investigate other nanomaterials that could be used effectively as an alternative in medical fields.

Effects of Altering Magnesium Metal Surfaces on Degradation In Vitro and In Vivo during Peripheral Nerve Regeneration.

In vivo use of biodegradable magnesium (Mg) metal can be plagued by too rapid a degradation rate that removes metal support before physiological function is repaired. To advance the use of Mg biomedical implants, the degradation rate may need to be adjusted. We previously demonstrated that pure Mg filaments used in a nerve repair scaffold were compatible with regenerating peripheral nerve tissues, reduced inflammation, and improved axonal numbers across a short-but not long-gap in sciatic nerves in rats. To determine if the repair of longer gaps would be improved by a slower Mg degradation rate, we tested, in vitro and in vivo, the effects of Mg filament polishing followed by anodization using plasma electrolytic oxidation (PEO) with non-toxic electrolytes. Polishing removed oxidation products from the surface of as-received (unpolished) filaments, exposed more Mg on the surface, produced a smoother surface, slowed in vitro Mg degradation over four weeks after immersion in a physiological solution, and improved attachment of cultured epithelial cells. In vivo, treated Mg filaments were used to repair longer (15 mm) injury gaps in adult rat sciatic nerves after placement inside hollow poly (caprolactone) nerve conduits. The addition of single Mg or control titanium filaments was compared to empty conduits (negative control) and isografts (nerves from donor rats, positive control). After six weeks in vivo, live animal imaging with micro computed tomography (micro-CT) showed that Mg metal degradation rates were slowed by polishing vs. as-received Mg, but not by anodization, which introduced greater variability. After 14 weeks in vivo, functional return was seen only with isograft controls. However, within Mg filament groups, the amount of axonal growth across the injury site was improved with slower Mg degradation rates. Thus, anodization slowed degradation in vitro but not in vivo, and degradation rates do affect nerve regeneration.

Single Atom-Doped Nanosonosensitizers for Mutually Optimized Sono/Chemo-Nanodynamic Therapy of Triple Negative Breast Cancer.

Sonodynamic therapy (SDT) represents a promising therapeutic modality for treating breast cancer, which relies on the generation of abundant reactive oxygen species (ROS) to induce oxidative stress damage. However, mutant breast cancers, especially triple-negative breast cancer (TNBC), have evolved to acquire specific antioxidant defense functions, significantly limiting the killing efficiency of SDT. Herein, the authors have engineered a distinct single copper atom-doped titanium dioxide (Cu/TiO2 ) nanosonosensitizer with highly catalytic and sonosensitive activities for synergistic chemodynamic and sonodynamic treatment of TNBC. The single-atom Cu is anchored on the most stable Ti vacancies of hollow TiO2 sonosensitizers, which not only substantially improved the catalytic activity of Cu-mediated Fenton-like reaction, but also considerably augmented the sonodynamic efficiency of TiO2 by facilitating the separation of electrons (e- ) and holes (h+ ). Both the in vitro and in vivo studies demonstrate that the engineered single atom-doped nanosonosensitizers effectively achieved the significantly inhibitory effect of TNBC, providing a therapeutic paradigm for non-invasive and safe tumor elimination through the mutual process of sono/chemo-nanodynamic therapy based on multifunctional single-atom nanosonosensitizers.

Anisotropic micro cutting of rolled titanium alloy

In machining of rolled titanium alloy, the anisotropy in the cutting force induced by the rolling texture should be controlled to achieve high quality surface. The cutting tests on the normal direction (ND) plane of a rolled titanium alloy plate are conducted with changing the cutting direction with respect to the rolling direction. The deformation and the cutting force in micro cutting are discussed compared to those in cutting of single crystal titanium. Although the anisotropic effect on the cutting process is smaller than that of the single crystal workpiece, little deformation occurs around the boundary between the groove and the unmachined surface when cutting along the rolling direction. The material behavior is characterized by the shear plane cutting model. The shear angle and the shear stress on the shear plane depend on the cutting direction for the rolling direction.

Anticorrosion performance of TiN coating with electroless nickel-phosphorus interlayer on Al 6061 alloy

The corrosion behavior of single titanium nitride (TiN) coating, and TiN coating with nickel phosphorous (NiP) interlayer deposited on Al 6061-T6 substrate was investigated in 0.6 M NaCl electrolyte at pH = 7 using long-term Electrochemical Impedance Spectroscopy, potentiodynamic polarization, and microscopic observations. Also, the surface morphology and chemical composition of the coating surface were characterized using Scanning Electron Microscopy. The duplex-coated aluminum alloy showed more corrosion resistance than the single TiN coated specimen through the blocking of top layer pinholes at all times of exposure. Then the simultaneous effect of pH, temperature, and Clˉ concentration on corrosion current density of NiP/TiN coated aluminum alloy was studied by employing the Central Composite Experimental Design method. The pH had the maximum effect on corrosion current density among all the parameters, followed by temperature and Clˉ concentration. The corrosion behavior of NiP/TiN coating at different pH levels (2, 7, 12) demonstrated 25 times reduction of corrosion current density in an alkaline environment compared to an acidic solution.

A new model for puffing and micro-explosion of single titanium(IV) isopropoxide/p-xylene precursor solution droplets

In flame spray pyrolysis, the precursor solution droplet undergoes heating and evaporation, followed by gas phase combustion and generation of nanoparticles. Depending on the precursor solution, the precursor/solvent droplet may experience puffing and micro-explosion. A new one-dimensional model is developed to describe these processes in the spherically symmetric droplet interior with emphasis on the puffing and the micro-explosion. After the initial droplet heating, the preferential evaporation of the higher volatile component causes the accumulation of the lower volatile precursor at the droplet surface and thus forms a liquid shell that hinders the evaporation process. In the droplet interior away from the liquid shell, the higher volatile component accumulates and when the temperature reaches the boiling point of that liquid, puffing occurs. If the pressure inside the droplet exceeds the ambient pressure, the droplet undergoes micro-explosion. The present study concerns single precursor/solvent droplets of titanium(IV) isopropoxide (TTIP) in p-xylene at room temperature in hot convective air at atmospheric pressure. A parameter study is performed to show the dependence of the puffing and the micro-explosion on the initial precursor loading, the initial droplet size, the ambient gas temperature, and the relative velocity between the droplet and the ambience. There are situations where micro-explosion follows the puffing or puffing repeats until the end of the droplet lifetime with no micro-explosion. This is the first model to successfully describe the puffing in precursor solution droplets and the micro-explosion which may follow the puffing.

Influence of the Peek Abutments on Mechanical Behavior of the Internal Connections Single Implant.

The present study aimed to evaluate the biomechanical behavior of PEEK abutments with different heights on single titanium implants. To investigate the implant surface, different tests (scanning electron microscopy, energy-dispersive X-ray, and X-ray diffraction) were adopted. Herein, 20 implants received the 4.5 × 4.0 mm PEEK short abutment (SA) and 20 received the 4.5 × 5.5 mm PEEK long abutment (LA). The abutments were installed using dual-cure resin cement. To determine the fatigue test, two specimens from each group were submitted to the single load fracture test. For this, the samples were submitted to a compressive load of (0.5 mm/min; 30°) in a universal testing machine. For the fatigue test, the samples received 2,000,000 cycles (2 Hz; 30°). The number of cycles and the load test was analyzed by the reliability software SPSS statistics using Kaplan-Meier and Mantel-Cox tests (log-rank) (p < 0.05). The maximum load showed no statistically significant differences (p = 0.189) for the SA group (64.1 kgf) and the LA group (56.5 kgf). The study groups were statistically different regarding the number of cycles (p = 0.022) and fracture strength (p = 0.001). PEEK abutments can be indicated with caution for implant-supported rehabilitation and may be suitable as temporary rehabilitation.

Lithium incorporation enhanced resistive switching behaviors in lithium lanthanum titanium oxide-based heterostructure

• Self-rectifying resistive switching device based on lithium lanthanum titanium oxide. • The simplified device has a high rectification ratio and on/off ratio. • Schottky barrier assisted model explains the electronic bipolar resistive switching. • Li + migration accelerates electron injection and enhances the performance of the device. Resistive switching devices with a high self-rectifying ratio are important for achieving the crossbar memristor array that overcomes the sneak current issue. Herein, we demonstrate a single amorphous lithium lanthanum titanium oxide (LLTO) layer based Pt/LLTO/Pt device possessing a self-rectifying ratio higher than 1 × 10 4 that is comparable to the reported devices with complicated multi-layer stacking structures. Moreover, the device shows forming-free and highly uniform bipolar resistive switching (BRS) characteristic that facilitates the potential applications. The trap-controlled and trap-free space charge limited conductions are demonstrated to dominate the high and low resistance states of the device, respectively. The fast migration of lithium ions under external voltage accelerates the electron injection across the Pt/LLTO interface and also the space charge accumulation in the LLTO layer, and as a result, the high performance of the Pt/LLTO/Pt device was achieved. As demonstrated Pt/LLTO/Pt device sheds a light on the potential applications of the lithium ionic conductors in self-rectifying resistive switching devices.

Atomic Ti-Nx sites with switchable coordination number for enhanced visible-light photocatalytic water disinfection

Photocatalytic sterilization represents one of the promising strategies for efficient utilization of solar energy to remove hazardous materials, mainly based on the development of intrinsic materials with intact structures that actually cannot be absolutely remained under light irradiation but ignored in most cases. Herein, novel single titanium atoms anchored on g-C3N4 photocatalysts were facilely prepared by calcination of g-C3N4 with bis(cyclopentadienyl)dicarbonyl titanium. The introduction of single Ti atoms in g-C3N4 promoted photocatalytic efficiency by improving the separation efficiency of carriers with a broad visible-light-responsive range and reducing the energy barrier for the transfer of superoxide radicals to hydroxyl radicals. Especially, upon light-driven interaction with adsorbed O2, the photocatalyst coordination number could be remarkably regulated in situ from Ti–N6 to Ti–N4, which led to a more efficient generation of clean active substances in disinfectants (O2•− and •OH). As a result, the single Ti catalyst showed superior activity in the photocatalytic disinfection of bacteria and excellent recyclability. The inactivation of E. coli for the CN–Ti50 sample was 91.2% under irradiation for 30 min, which was 9.9 times that of pure g-C3N4. This in situ activation approach opens a new avenue for engineering efficient and energy-saving catalysts for water sterilization.

Economical and efficient dye sensitized solar cells using single wall carbon nanotube-titanium dioxide nanocomposites as photoanode and SWCNT as Pt-free counter electrode

Economical and efficient dye sensitized solar cells (DSSC) were fabricated using single wall carbon nanotube and titanium dioxide [SWCNT-TiO2] nanocomposite as photoanode and SWCNT as Platinum free (Pt-free) counter electrode (CE). By physical mixing, precise amounts (0.006 wt%, 0.018 wt%, 0.03 wt%, and 0.06 wt%) of SWCNT was mixed in TiO2 nano particles paste to obtain nanocomposite paste [nSWCNT-TiO2] for the anodes. Attachment and distribution of SWCNT within/among the TiO2 components has been confirmed using X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), and X-ray mapping techniques. The catalytic activity and stability of the SWCNT as catalyst in the CE of fabricated DSSCs have been appraised using cyclic voltammetry (CV), Tafel, and chronoamperometry characterizations. Finally, the fabricated solar cells have been evaluated by current–voltage characteristics (IV) and electrochemical impendence spectroscopy (EIS). The optimized cell containing 0.018 wt% of SWCNTs mixed in TiO2 paste i.e. [0.018 %SWCNT-TiO2] for anode preparation and SWCNT as Pt-free CE i.e. [0.018 %SWCNT-TiO2/N3/SWCNT] showed an overall efficiency of 8.05 %, which is about 44 % higher than the conventional [TiO2/N3/Pt] based solar cell fabricated under the same conditions. This improvement in the overall power conversion efficiency (PCE) can be ascribed to the improved electron collection at photo-anode i.e. reduced charge recombination, efficient electron transport, good catalytic activity of the SWCNT at CE, and enhanced light harvesting efficiency due to the more dye adsorption.

Molecular dynamics simulations of the machining of oxidized and deoxidized titanium work pieces

Advances in the machining of titanium work pieces are of particular interest to areas such as the aerospace and naval industry. However, titanium is known to be a difficult-to-machine material. Recent studies suggest that the presence of oxygen from ambient air has a significant influence on its wear mechanism. Removing oxygen from the system reduces tool wear and therefore improves the surface finish of the tool in the long term. However, the exact mechanism of wear caused by oxygen is still up to debate. In this work, we study molecular dynamics simulations of the cutting process of single crystalline hcp titanium on the (0001) plane with and without an oxide layer. Reference simulations with pure titanium of different crystal sizes are performed in order to reveal size effects. We find that the oxygen layer behaves very brittle compared to the bulk crystal material and influences the chip formation on the nanoscale. Instead of forming a smooth chip, as for pure titanium, the simulation with an oxide layer shows no chip formation at all in the observed time scale. The layer breaks and locally induces high temperatures of ∼1700 K in the material. These high temperatures could lead to enhanced interdiffusion of work piece and tool material and could therefore amplify the predominant tool wear mechanism.

Molecular Dynamics Study on the Welding Behavior in Dissimilar TC4-TA17 Titanium Alloys.

Titanium alloys have become the material of choice for marine parts manufacturing due to their high specific strength and excellent resistance to seawater corrosion. However, it is still challenging for a single titanium alloy to meet the comprehensive specifications of a structural component. In this study, we have applied a molecular dynamics approach to simulate the aging phase transformation, K-TIG welding process, and mechanical properties of the TC4-TA17 (Ti6Al4V-Ti4Al2V) alloy. The results show that during the aging phase transformation process, changes in the structure of the titanium alloys are mainly manifested in the precipitation of a new phase from the sub-stable β-phase, and after the state stabilization, the α-phase content reaches 45%. Moreover, during the melting and diffusion process of TC4-TA17, aluminum atoms near the interface diffuse, followed by titanium atoms, while relatively few vanadium atoms are involved in the diffusion. Finally, the results of tensile simulations of the TC4-TA17 alloy after welding showed that stress values can reach up to 9.07 GPa and that the mechanical properties of the alloy in the weld zone are better than those of the single alloys under the same conditions. This study will provide theoretical support for the optimization of process parameters for TC4-TA17 alloy welding.

Design of effective graphenes co-doped by transition metal and nonmetal atoms for nitrate electroreduction: A first-principles study

Developing high-efficient electrocatalysts driven by renewable electricity to eliminate hazardous nitrate (NO3−) in daily life is of great scientific value. Thereby, a valid heterogeneous catalyst is proposed based on single titanium atom supported on sulfur co-doped graphene (TiS-G) for nitrate reduction reaction (NO3RR) using density functional theory (DFT). Under an external potential of 0.53 V, the overall reduction progress is thermodynamic spontaneous at ambient temperature and the maximum kinetic determining step is the formation of ammonia with a barrier of 0.63 V, comparable with experimental benchmark Cu(111). Intriguingly, this increased activity originates from reasonable accumulation of d orbital electrons around Fermi level, which contributes to a linear relationship between the atomic charge and classic d band center of the transition metal. Furthermore, metal clustering aggression, oxide poisoning, and dynamic stability are thorough examined in order to ensure the robustness of TiS-G structure under actual environment. This work not only opens up a novel avenue for the potential application of carbon-based electrodes in NO3RR, but also offers an atomic insight into catalytic reaction mechanism.

Development of a High-Reliability Vacuum Arc Thruster System

Current vacuum arc thruster systems show insufficient reliability in the low-power () operation mode, which is required for CubeSat propulsion systems. Typically, the failure of the whole thruster system is caused by the failure of the arc ignition system. The reasons for this are deposition of a conducting coating on the insulator surface and geometry changes of the cathode. In this work, a highly reliable vacuum arc thruster system for electric propulsion of small satellite systems (for example, CubeSats) is presented. It is able to reach more than 10 million pulses while keeping the trigger voltage below 3 kV, which is one order of magnitude higher than those of previously published results. The system includes a novel thruster head design in combination with a newly developed power supply system. It was tested with a variable pulse frequency from 1 to 5 Hz. The thruster uses a single titanium cathode in combination with a dual-anode design and can be easily extended with a magnetic nozzle. The combination of the geometry and the power supply creates a system that deals with the aforementioned failure mechanisms. Several long-term tests were performed to demonstrate the system’s functionality. Moreover, erosion measurements and a failure analysis were conducted.

High Survivorship of a Modular Titanium Baseplate Independent of Body Mass Index and Malalignment.

Tibial component aseptic loosening remains problematic in primary total knee arthroplasty (TKA). Influential factors include component design, metallurgy, and cement technique. Additionally, reports advocate for longer tibial stem fixation in high body mass index (BMI) patients. We have utilized a single stem length modular titanium baseplate in patients regardless of BMI, bone quality, or malalignment. We report the survivorship of this implant with focus on the impact of elevated BMI and postoperative malalignment. We retrospectively reviewed patients who underwent TKA with a single modular titanium baseplate with a cruciate-shaped keel between 2004 and 2018. In total, 2,949 TKAs with a minimum of 1-year follow-up were included. The mean follow-up was 7 years. The primary outcome was component failure stratified by BMI and postoperative malalignment. High viscosity cement was utilized in all cases. Chi-squared and t-tests were used to compare outcome variables across groups. Eighty-five implants (2.8%) were revised with 46 (1.6%) for aseptic loosening. Failure was not associated with BMI, gender, American Society of Anesthesiologists class, or Charlson Comorbidity Index. There was no difference in failure rate by BMI (P= .26) or by malalignment (outside of 3° from neutral mechanical axis) (P= .67). Age was associated with failure as patients with failed TKAs were younger (61 vs 65, P < .01). This design of a specific modular titanium base plate with a cruciate-shaped keel and grit blast surface demonstrated 99% survivorship regardless of patient BMI or malalignment over 7-year follow-up period. Consistent cement technique with high viscosity cement indicates that component design remains an important variable impacting survivorship in TKA.