U.S. Department of Energy

The United States of America As Represented by the Department of Energy

Other

Battelle Memorial Institute

Bio Dg, Inc.

Paul D Jablonski

Jeffrey Allen Hawk

Christopher J Cowen

David E Alman

Martin Detrois

Herbert Radisch

Omer Dogan

Gordon Holcomb

Jeffrey A Hawk

Herbert R Radisch, Jr

Malgorzata Ziomek-Moroz

Michael C Gao

Joseph H Tylczak

Alvaro A Rodriguez

Nickel alloys, methods of making nickel alloys, articles including the nickel alloys, uses of the alloys, and methods of treating nickel alloys are described. The inventive heat resistant structural materials are suitable for applications requiring high yield stress at room temperature and good creep strength at high temperatures, such as in gas turbines, steam turbines, fossil energy boilers, aero engines, power generation systems using fluids such as supercritical carbon dioxide (e.g., advanced ultra-supercritical power plants), concentrated solar power plants, nuclear power plants, molten salt reactors: turbine blades, casings, valves, heat exchangers and recuperators.

NiCrMoNb age hardenable alloy for creep-resistant high temperature applications, and methods of making

The invention provides medical devices comprising high-strength alloys which degrade over time in the body of a human or animal, at controlled degradation rates, without generating emboli and which have enhanced degradation due to the presence of a halogen component. In one embodiment the alloy is formed into a bone fixation device such as an anchor, screw, plate, support or rod. In another embodiment the alloy is formed into a tissue fastening device such as staple. In yet another embodiment, the alloy is formed into a dental implant or a stent.

Implantable medical devices comprising bio-degradable alloys with enhanced degradation rates

This disclosure provides alloy compositions comprising the main constituent elements iron, nickel, cobalt, molybdenum, and chromium. In one embodiment, the alloy comprises 10.0 to 30.0 wt % iron; 30.0 to 60.0 wt % nickel; 10.0 to 25.0 wt % cobalt; 1.0 to 15.0 wt % molybdenum; 15.0 to 25.0 wt % chromium by weight; where the sum of iron and nickel is at least 50 wt %; and, where the balance comprises minor elements, the total amount of minor elements being about 5% or less by weight. The alloy compositions have use as coatings to protect metals and alloys from corrosion in extreme environments where corrosion is a major concern such as with exposure to sea water or sea water with CO.

High-performance corrosion-resistant high-entropy alloys

One or more embodiments relates to a method of casting a creep-resistant Ni-based superalloy and a homogenization heat treatment for the alloy. The method includes forming a feed stock having Nickel (Ni) and at least one of Chromium (Cr), Cobalt (Co), Aluminum (Al), Titanium (Ti), Niobium (Nb), Iron (Fe), Carbon (C), Manganese (Mn), Molybdenum (Mo), Silicon (Si), Copper (Cu), Phosphorus (P), Sulfur (S) and Boron (B). The method further includes fabricating the creep-resistant Ni-based superalloy in a predetermined shape using the feed stock and at least one process such as vacuum induction melting (VIM), electroslag remelting (ESR) and/or vacuum arc remelting (VAR).

Creep resistant Ni-based superalloy casting and method of manufacture for advanced high-temperature applications

The disclosure provides a creep resistant alloy having an overall composition comprised of iron, chromium, molybdenum, carbon, manganese, silicon, nickel, vanadium, niobium, nitrogen, tungsten, cobalt, tantalum, boron, copper, and potentially additional elements. In an embodiment, the creep resistant alloy has a molybdenum equivalent Mo(eq) from 1.475 to 1.700 wt. % and a quantity (C+N) from 0.145 to 0.205. The overall composition ameliorates sources of microstructural instability such as coarsening of MCcarbides and MX precipitates, and mitigates or eliminates Laves and Z-phase formation. A creep resistant martensitic steel may be fabricated by preparing a melt comprised of the overall composition followed by at least austenizing and tempering. The creep resistant alloy exhibits improved high-temperature creep strength in the temperature environment of around 650&#xb0; C.

Creep resistant high temperature martensitic steel

One or more embodiments relates to a method of producing an MCrAlY bond coat comprising an MCrAlY layer in contact with a Y&#x2014;AlOlayer. The MCrAlY layer is comprised of a &#x3b3;-M solid solution, a &#x3b2;-MAl intermetallic phase, and Y-type intermetallics. The Y&#x2014;AlOlayer is comprised of Yttrium atoms coordinated with oxygen atoms comprising the AlOlattice. The method comprises depositing an MCrAlY material on a substrate, applying an YOpaste, and heating the substrate in a non-oxidizing atmosphere at a temperature between 400-1300&#xb0; C. for a time sufficient to generate the Y&#x2014;AlOlayer. Both the MCrAlY layer and the Y&#x2014;AlOlayer have a substantial absence of YO, YAG, and YAP phases.

MCrAlY bond coat with enhanced yttrium

The disclosure provides a creep resistant alloy having an overall composition comprised of iron, chromium, molybdenum, carbon, manganese, silicon, nickel, vanadium, niobium, nitrogen, tungsten, cobalt, tantalum, boron, and potentially additional elements. In an embodiment, the creep resistant alloy has a molybdenum equivalent Mo(eq) from 1.475 to 1.700 wt. % and a quantity (C+N) from 0.145 to 0.205. The overall composition ameliorates sources of microstructural instability such as coarsening of MCcarbides and MX precipitates, and mitigates or eliminates Laves and Z-phase formation. A creep resistant martensitic steel may be fabricated by preparing a melt comprised of the overall composition followed by at least austenizing and tempering. The creep resistant alloy exhibits improved high-temperature creep strength in the temperature environment of around 650&#xb0; C.

One or more embodiments relates to an MCrAlY bond coat comprising an MCrAlY layer in contact with a Y&#x2014;AlOlayer. The MCrAlY layer is comprised of a &#x3b3;-M solid solution, a &#x3b2;-MAl intermetallic phase, and Y-type intermetallics. The Y&#x2014;AlOlayer is comprised of Yttrium atoms coordinated with oxygen atoms comprising the AlOlattice. Both the MCrAlY layer and the Y&#x2014;AlOlayer have a substantial absence of Y&#x2014;Al oxides, providing advantage in the maintainability of the Yttrium reservoir within the MCrAlY bulk. The MCrAlY bond coat may be fabricated through application of a YOpaste to an MCrAlY material, followed by heating in a non-oxidizing environment.

MCrAlY bond coat with enhanced Yttrium layer

A hinge assembly is movable between open and closed positions and capable of being locked in an open position. The hinge assembly comprises first and second hinge members including, respectively, first and second body portions. A hinge pin assembly cooperates with the hinge members and has aligned internal bores and a longitudinal axis about which the hinge members rotate. A locking pin is movable within the internal bores between a first position and a second position. When the locking pin is in the first position the hinge members cannot rotate relative to one another, and when the locking pin is in the second position the hinge members can rotate relative to one another. A magnetic latch member is mounted to one of the hinge members to hold the locking pin in one of the first or second positions. The locking components may include a mechanical override device to prevent damage.

Hinge assembly

A hinge assembly is movable between an open position and a closed position and capable of being locked in an open position. The hinge assembly comprises first and second hinge members including, respectively, first and second body portions. The first and second body portions have aligned internal bores and a longitudinal axis about which the first and second hinge members rotate. A locking pin is movable within the hinge members' internal bores between a first position and a second position. When the locking pin is in the first position the hinge members cannot rotate relative to one another, and when the locking pin is in the second position hinge members can rotate relative to one another. A magnetic latch member is mounted to one of the hinge members to hold the locking pin in one of the first or second positions.

One or more embodiments relates to a high-temperature, titanium alloyed, 9 Cr-1 Mo steel exhibiting improved creep strength and oxidation resistance at service temperatures up to 650&#xb0; C. The 9 Cr-1 Mo steel has a tempered martensite microstructure and is comprised of both large (0.5-3 &#x3bc;m) primary titanium carbides and small (5-50 nm) secondary titanium carbides in a ratio of. from about 1:1.5 to about 1.5:1. The 9 Cr-1 Mo steel may be fabricated using exemplary austenizing, rapid cooling, and tempering steps without subsequent hot working requirements. The 9 Cr-1 Mo steel exhibits improvements in total mass gain, yield strength, and time-to-rupture over ASTM P91 and ASTM P92 at the temperature and time conditions examined.

9 Cr&#x2014; 1 Mo steel material for high temperature application

The invention relates to a composition and heat treatment for a high-temperature, titanium alloyed, 9 Cr-1 Mo steel exhibiting improved creep strength and oxidation resistance at service temperatures up to 650&#xb0; C. The novel combination of composition and heat treatment produces a heat treated material containing both large primary titanium carbides and small secondary titanium carbides. The primary titanium carbides contribute to creep strength while the secondary titanium carbides act to maintain a higher level of chromium in the finished steel for increased oxidation resistance, and strengthen the steel by impeding the movement of dislocations through the crystal structure. The heat treated material provides improved performance at comparable cost to commonly used high-temperature steels such as ASTM P91 and ASTM P92, and requires heat treatment consisting solely of austenization, rapid cooling, tempering, and final cooling, avoiding the need for any hot-working in the austenite temperature range.

Heat treated 9 Cr-1 Mo steel material for high temperature application

A method of applying a cerium diffusion coating to a preferred nickel base alloy substrate has been discovered. A cerium oxide paste containing a halide activator is applied to the polished substrate and then dried. The workpiece is heated in a non-oxidizing atmosphere to diffuse cerium into the substrate. After cooling, any remaining cerium oxide is removed. The resulting cerium diffusion coating on the nickel base substrate demonstrates improved resistance to oxidation. Cerium coated alloys are particularly useful as components in a solid oxide fuel cell (SOFC).

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Salem, OR, United States of America

Paul D Jablonski