Evanston, IL, United States

Questek Innovations Llc

www.questek.com
Evanston, IL, United States
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Patent
Questek Innovations Llc | Date: 2017-04-05

Alloys, processes for preparing the alloys, and articles including the alloys are provided. The alloys can include, by weight, about 4% to about 7% aluminum, 0% to about 0.2% carbon, about 7%) to about 11% cobalt, about 5% to about 9% chromium, about 0.01% to about 0.2%> hafnium, about 0.5%> to about 2% molybdenum, 0% to about 1.5% rhenium, about 8% to about 10.5% tantalum, about 0.01% to about 0.5% titanium, and about 6% to about 10% tungsten, the balance essentially nickel and incidental elements and impurities.


Patent
Questek Innovations Llc | Date: 2017-03-01

Alloys, a process for preparing the alloys, and manufactured articles including the alloys are described herein. The alloys include, by weight, about 11.5% to about 14.5% chromium, about 0.01% to about 3.0% nickel, about 0.1% to about 1.0% copper, about 0.1% to about 0.2% carbon, about 0.01% to about 0.1% niobium, 0% to about 5% cobalt, 0% to about 3.0% molybdenum, and 0% to about 0.5% titanium, the balance essentially iron and incidental elements and impurities


Patent
Questek Innovations Llc | Date: 2015-04-14

Alloys, processes for preparing the alloys, and articles including the alloys are provided. The alloys can include, by weight, about 0.01% to about 1% vanadium, 0% to about 0.04% carbon, 0% to about 8% niobium, 0% to about 1% titanium, 0% to about 0.04% boron, 0% to about 1% tungsten, 0% to about 1% tantalum, 0% to about 1% hafnium, and 0% to about 1% ruthenium, the balance essentially molybdenum and incidental elements and impurities.


Patent
Questek Innovations Llc | Date: 2017-03-01

Alloys, processes for preparing the alloys, and articles including the alloys are provided. The alloys can include, by weight, about 0.01% to about 1% vanadium, 0% to about 0.04% carbon, 0% to about 8% niobium, 0% to about 1% titanium, 0% to about 0.04% boron, 0% to about 1% tungsten, 0% to about 1% tantalum, 0% to about 1% hafnium, and 0% to about 1% ruthenium, the balance essentially molybdenum and incidental elements and impurities.


Alloys, processes for preparing the alloys, and articles including the alloys are provided. The alloys can include, by weight, about 0% to about 8% nickel, about 1% to about 6% tungsten, about 1% to about 4% copper, about 0.1% to about 2% chromium, about 0.01% to about 1% vanadium, about 0.01% to about 0.5% carbon, about 0.01% to about 0.1% titanium, about 0.001% to about 0.01% boron, about 0% to about 1% silicon, and about 0% to about 0.1% calcium, the balance essentially iron and incidental elements and impurities.


Grant
Agency: Department of Energy | Branch: | Program: SBIR | Phase: Phase II | Award Amount: 999.78K | Year: 2016

Phase I efforts will focus on finding HEA compositions that exhibit suitable phase equilibria for blade applications (e.g. FCC/L1 2 two phase equilibria). The search will begin with the construction and validation of a large CALPHAD (CALculation of PHAse Diagrams) thermodynamic database specifically designed for HEA compositions, as current CALPHAD databases are not sufficiently accurate at equiatomic compositions. Such CALPHAD databases are an essential component of any materials design effort and will offer quantitative predictions of phase stability. The HEA database will be based on experimental data as well as exhaustive high-throughput density functional theory (DFT) calculations of the mixing enthalpies for all combinatorially possible FCC, BCC, and L1 2 ternary solid solutions. DFT calculations will be performed at the University of Illinois at Urbana-Champaign National Center for Supercomputing Applications. Potential IGT HEA compositions will be identified using the HEA CALPHAD database and then experimentally verified by lab-scale alloy synthesis and characterization. Phase II will consist of applying QuesTek’s Integrated Computational Materials Engineering (ICME) technologies on promising Phase I HEAs to optimize composition and processing for improved strength and stability. The feasibility and commercialization of HEA turbine blades will be examined on full-scale prototypes, with full heats of the alloys produced by a specialty alloys producer and blade components tested by an IGT OEM. Phase II will also include extension of the HEA CALPHAD database with additional elements and phases from high-throughput DFT calculations. This will enable the prediction of additional HEA compositions and exploration of the effect of minor alloying elements (e.g. C, N, and S) on HEA properties.


Grant
Agency: Department of Energy | Branch: | Program: SBIR | Phase: Phase II | Award Amount: 999.39K | Year: 2016

Under this SBIR program, QuesTek Innovations LLC will explore the possibility of high entropy alloy (HEA) for industrial gas turbine (IGT) components with its computational alloy design tools and methods. QuesTek is uniquely qualified to find HEAs suitable for turbine components with extensive experience in superalloy design and the rapid development of materials models and databases. Phase I efforts focused on finding HEA compositions that exhibit suitable phase equilibria for blade applications, culminating in the construction and validation of a large CALPHAD (CALculation of PHAse Diagrams) thermodynamic database specifically designed for HEA compositions, as current CALPHAD databases are not sufficiently accurate at equiatomic compositions. Such CALPHAD databases are an essential component of any materials design effort and will offer quantitative predictions of phase stability. The proposed Phase II will consist of using QuesTek’s Integrated Computational Materials Engineering (ICME) technologies to develop several HEA blade design concepts. Focus will be placed on optimizing creep, strength, and oxidation performance, made possible by the development of quantitative structure-property models and highperformance computing resources. The performance of intermediate-scale (~10-30 lbs) prototype castings on the above properties will be assessed and compared to benchmark alloys, demonstrating the potential of HEAs for IGT applications. This alloy development program will include several partners: Siemens Power Generation, a leading manufacturer of land-based gas turbines for power plants; Carpenter Technology and H.C. Starck, global leaders in transition metal and refractory alloy production; and Prof. Peter K. Liaw of the University of Tennessee, a world-renowned expert in HEA science. The potent partnership of a materials designer (QuesTek), a top HEA expert (Peter Liaw), alloy producers (Carpenter and H.C. Starck), and an OEM gas turbine manufacturer (Siemens), ensures a successful program for accelerating the development of the currently nascent HEA technology towards a superior commercial product.


Grant
Agency: Department of Energy | Branch: | Program: SBIR | Phase: Phase I | Award Amount: 154.75K | Year: 2016

Under this SBIR program, QuesTek Innovations LLC will explore the possibility of high electrical conductivity components (e.g. wires or cables) with its computational alloy design methodologies and tools. QuesTek’s extensive experience in the ICME approach to alloy design, rapid development of materials databases, and strong track record of material development and scale-up makes it uniquely qualified to find base alloys suitable for covetic conversion and insertion into transmission line components. Phase I efforts will focus on utilizing an ICME approach to design base alloy compositions (e.g. Cu- or Al- base alloys) that exhibit suitable characteristics for creating high electrical conductivity covetic materials for commercial applications. The search will begin with a literature review of existing electrical conductivity and strength models, with a focus on the composition-dependence of electrical conductivity and strength. Design efforts will then focus on optimizing a base alloy that simultaneously maximizes strength and castability while minimizing electron scattering (for the best electrical conductivity). Candidate alloys will be fabricated and converted into covetic material at the 10-lb scale at GDC Industries in Dayton, OH, after which they will be extruded into component form and evaluated for their electrical conductivity, strength, and other properties of interest at the University of Illinois at Urbana-Champaign (UIUC). These property evaluations will be used to update and improve models for optimization in Phase II. In Phase II, QuesTek will apply its Integrated Computational Materials Engineering (ICME) technologies on promising Phase I covetic base alloys to optimize composition and processing for improved castability, strength, processability, and electrical conductivity. The feasibility of covetic materials will be examined on full-scale prototypes of high-power transmission cables, with full heats of covetic material produced by a covetic materials producer and cable components tested by an electricity transmission OEM. Phase II will also include extension of the strength and electrical conductivity models to include the effects of microstructural features found within the promising materials. Phase III efforts will be focused on the commercialization of covetic electrical power transmission components and of the electrical conductivity and strength models that will result as a part of this research and development.


In this program, QuesTek Innovations LLC, a leader in the field of computational materials design, proposes to develop a robust creep modeling toolkit that expands its computational Materials by Design® technology, in order to predict the long term creep performance of materials for base alloys and weldments in fossil energy systems under wide thermal and mechanical conditions. Precipitation modeling using thermodynamic databases, e.g., PrecipiCalc® software and vacancy diffusivity prediction with quantum physics-based DFT calculations will provide fundamental quantities that will be used as inputs for upscaling strategies/methods. The ultimate goal will be to establish microstructure sensitive models that capture the different creep mechanisms observed in ferritic steels and integrate the models into QuesTek’s DARPA-AIM efforts to predict the variability of the creep strength as a function of the microstructure and service conditions. In the Phase I effort, the methods proposed will be demonstrated on a specific material class of ferritic steels, but the methodology developed would be applicable to alternate material systems and microstructures through additional ‘modules’ that capture the relevant mechanisms of creep. In Phase II, we will expand the tools and exercise them in wider applications with various materials systems. Additionally, integration of precipitate evolution schemes into the long term material behavior i.e., stability of microstructure and the different phases over long time periods, along with a refined uncertainty quantification of various material and process parameters, will be assessed and calibrated in Phase II. Accurate and efficient quantification of material properties for AUSC boilers will directly enhance the success of DOE’s crosscutting research and new alloy development program and provide significant public benefits. Key words:Long-term creep, precipitation coarsening, 9% Cr ferritic steel, PrecipiCalc, continuum damage model, ThermoCalc, Questek innovations.


Patent
Questek Innovations Llc | Date: 2016-06-22

Provided herein are titanium alloys that can achieve a combination of high strength and high toughness or elongation, and a method to produce the alloys. By tolerating iron, oxygen, and other incidental elements and impurities, the alloys enable the use of lower quality scrap as raw materials. The alloys are castable and can form -phase laths in a basketweave morphology by a commercially feasible heat treatment that does not require hot-working or rapid cooling rates. The alloys comprise, by weight, 3.0% to 6.0% aluminum, 0% to 1.5% tin, 2.0% to 4.0% vanadium, 0.5% to 4.5% molybdenum, 1.0% to 2.5% chromium, 0.20% to 0.55% iron, 0% to 0.35% oxygen, 0% to 0.007% boron, and 0% to 0.60% other incidental elements and impurities, the balance of weight percent comprising titanium.

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