General Electric Company

Other

Michael Francis Xavier Gigliotti

Bernard Patrick Bewlay

Stephen Francis Rutkowski

Shyh-Chin Huang

Thomas Joseph Kelly

Michael James Weimer

Andrew Philip Woodfield

Mohamed Rahmane

Eric Allen Ott

John Broddus Deaton, Jr

Robert S Gilmore

Clifford Earl Shamblen

Liang Jiang

Ramgopal Darolia

Canan Uslu Hardwicke

Ji-Cheng Zhao

Frederic Joseph Klug

Pazhayannur Ramanathan Subramanian

Melvin Robert Jackson

William Thomas Carter

Don Mark Lipkin

Mark Daniel Gorman

Ann Melinda Ritter

Todd Jay Rockstroh

Richard DiDomizio

Luana Emiliana Iorio

Venkat Subramaniam Venkataramani

Joseph David Rigney

Lawrence Bernard Kool

John Frederick Ackerman

Brian Ellis

Thomas James Batzinger

David Ulrich Furrer

Krishnamurthy Anand

Mark Allen Cheverton

Paul Steven Svec

Robert Edward Schafrik

Mark Kevin Meyer

Roger John Petterson

Sairam Sundaram

David Henry Abbott

Lawrence Donald Graham

David Paul Mourer

Edward James Nieters

Wayne D Pasco

Thomas Francis McNulty

Francis Johnson

Laurent Cretegny

Richard Eugene Klaassen

Vamshi Krishna Reddy Kommareddy

Matthew Bernard Buczek

Adegboyega Masud Makinde

Samuel Vinod Thamboo

Akane Suzuki

Shesh Krishna Srivatsa

Kenneth Rees Bain

Voramon Supatarawanich Dheeradhada

Jon Raymond Groh

Andrew David Deal

Sivaramanivas Ramaswamy

Asish Ghosh

Samar Jyoti Kalita

Robert Mark Garlock

Andrew John Elliott

Rajendra Madhukar Kelkar

Lee Cranford Perocchi

Alan Glen Turner

Michael Everett Keller

Jonathan Paul Blank

David Alan Utah

John William Short

Joseph Carl Wukusick

Nihat Kurkcu

Mandayam Tondanur Shyamsunder

John Alan Sutliff

Jacek Marian Franczak

Gangshu Shen

Phillip Harold Monaghan

Rajendra Machukar Kelkar

Mahesh Chandran

Brian Michael Ellis

A method of making a component includes: depositing a metallic powder on a workplane; directing a beam from a directed energy source to fuse the powder in a pattern corresponding to a cross-sectional layer of the component; repeating in a cycle the steps of depositing and fusing to build up the component in a layer-by layer fashion; and during the cycle of depositing and melting, using an external heat control apparatus separate from the directed energy source to maintain a predetermined temperature profile of the component, such that the resulting component has a directionally-solidified or single-crystal microstructure.

Layered manufacturing of single crystal alloy components

A method of making a component includes depositing a metallic powder on a workplane; directing a beam from a directed energy source to fuse the powder in a pattern corresponding to a cross-sectional layer of the component; repeating in a cycle the steps of depositing and fusing to build up the component in a layer-by layer fashion; and during the cycle of depositing and melting, using an external heat control apparatus separate from the directed energy source to maintain a predetermined temperature profile of the component, such that the resulting component has a directionally-solidified or single-crystal microstructure.

A method for preparing an article of a base metal alloyed with an alloying element includes the steps of preparing a compound mixture by the steps of providing a chemically reducible nonmetallic base-metal precursor compound of a base metal, providing a chemically reducible nonmetallic alloying-element precursor compound of an alloying element, and thereafter mixing the base-metal precursor compound and the alloying-element precursor compound to form a compound mixture. The compound mixture is thereafter reduced to a metallic alloy, without melting the metallic alloy. The step of preparing or the step of chemically reducing includes the step of adding an other additive constituent. The metallic alloy is thereafter consolidated to produce a consolidated metallic article, without melting the metallic alloy and without melting the consolidated metallic article.

Method for preparing a metallic article having an other additive constituent, without any melting

A cobalt-nickel alloy composition is described, containing about 20% to about 28% cobalt; about 37% to about 46% nickel; at least about 6% chromium; aluminum; and at least one refractory metal. The total weight of cobalt, aluminum, and refractory metal in the composition is less than about 50% of the total weight of the composition. Moreover, the alloy composition comprises both a (Co, Ni)-gamma phase and an L1-structured (gamma prime) phase. Various components made from the cobalt-nickel alloy composition are also described. Examples include high-temperature machinery and devices, e.g., components of gas turbine engines.

Cobalt-nickel superalloys, and related articles

Casting molds suitable for directional solidification processes using a liquid cooling bath include a graded facecoat structure on a mold body. The graded facecoat structure includes an innermost layer and a delamination layer, wherein the delamination layer fractures upon cooling of the molten metal so as to separate the mold body from the innermost layer, which remains in contact with or in close proximity to the metal being cast. Also disclosed are directional solidification processes.

Casting molds for use in directional solidification processes and methods of making

A coating process and system suitable for use on components subjected to high temperatures. The coating system includes an overlay coating of predominantly B2 phase rhodium aluminide (RhAl) intermetallic compound containing about 25 to about 90 atomic percent rhodium, about 10 to about 60 atomic percent aluminum, optionally up to a combined total of about 25 atomic percent of one or more platinum group metals chosen from the group consisting of platinum, palladium, ruthenium, and iridium, and up to about 20 atomic percent of the base metal and alloying constituents of the substrate. The RhAl intermetallic coating may serve as an environmental coating, a diffusion barrier layer for an overlying environmental coating, or both, with or without an outer ceramic coating.

Coating systems containing rhodium aluminide-based layers

Methods for making a reinforced refractory crucible for melting titanium alloys including providing a form, applying a facecoat to the form, the facecoat having at least one facecoat layer, applying a backing about the facecoat, the backing having at least one backing layer, applying at least one reinforcing element to at least a portion of the facecoat layer, the backing layer, or a combination thereof where the reinforcing element includes at least one composition selected from ceramic compositions, metallic compositions, and combinations thereof.

Methods for making reinforced refractory crucibles for melting titanium alloys

A casting process and apparatus for producing directionally-solidified castings, and castings produced therewith. The process entails applying a facecoat slurry to a surface within a mold cavity to form a continuous solid facecoat on the surface, introducing a molten metal alloy into the mold cavity so that the molten metal alloy contacts the facecoat, and then immersing the mold in a liquid coolant to cool and solidify the molten metal alloy and form a casting of the metal alloy, during which an oxide layer forms on the casting surface. The facecoat is sufficiently adherent to the oxide layer such that at least a portion of the facecoat detaches from the mold surface and remains tightly adhered to the casting surface in the event the casting contracts during cooling. The facecoat contains at least 60 weight percent of a first phase of yttria, and the balance of the facecoat is a binder phase of an inorganic material.

Casting processes, casting apparatuses therefor, and castings produced thereby

An article including a monolithic body including iron, cobalt, and nitrogen is provided. The monolithic body includes a matrix phase and a plurality of particles disposed within the matrix phase. The particles include a phase comprising nitrogen.

Soft magnetic materials

A metallic article is prepared by first furnishing at least one nonmetallic precursor compound, wherein all of the nonmetallic precursor compounds collectively containing the constituent elements of the metallic article in their respective constituent-element proportions. The constituent elements together form a titanium-base alloy having a stable-oxide-forming additive element therein, such as magnesium, calcium, scandium, yttrium, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium, and mixtures thereof. The stable-oxide-forming additive element forms a stable oxide in a titanium-based alloy. At least one additive element is present at a level greater than its room-temperature solid solubility limit in the titanium-base alloy. The precursor compounds are chemically reduced to produce an alloy material, without melting the alloy material. The alloy material may be consolidated. The alloy material, or consolidated metallic article, is thereafter desirably exposed to an oxygen-containing environment at a temperature greater than room temperature.

Method for producing a titanium-base alloy having an oxide dispersion therein

Refractory crucibles capable of managing thermal stress and suitable for melting highly reactive alloys having a facecoat, a backing, and at least one retaining ring applied about at least a portion of the backing of the crucible, the retaining ring comprising a composition selected from the group consisting of conductive materials, non-conductive materials, and combinations thereof.

Refractory crucibles capable of managing thermal stress and suitable for melting highly reactive alloys

Crucibles for melting titanium alloys having a facecoat including at least one facecoat layer containing an oxide selected from scandium oxide, yttrium oxide, hafnium oxide, a lanthanide series oxide, and combinations thereof, and a backing including at least one backing layer where the crucible has a backing to facecoat thickness ratio of from about 6.5:1 to about 20:1.

Crucibles for melting titanium alloys

Nb&#x2014;Si based alloy articles comprising a Nb&#x2014;Si based alloy upon which is disposed an environmentally-resistant coating are described. They include a coating comprising at least one phase selected from the group consisting of M(Al,Si), M(Al,Si), and MSiAl, wherein M is one or more of Nb, Ti, Hf, Cr. Such coating can improve the environmental (e.g., in oxidation-promoting environments) resistance of a Nb&#x2014;Si based alloy and alloy articles. Methods for preparing these articles are described as well.

Nb-Si based alloys having an Al-containing coating, articles, and processes

Shell molds and processes for making the shell molds that exhibit high emissivity in the red and infrared regions. In this manner, thermal resistance within a gap formed between solidifying cast metal and the interior mold surface is decreased. In one embodiment, the facecoat region is formed from a slurry composition comprising an aluminum oxide, a green chromium oxide and a silicon dioxide. In another embodiment, the facecoat region is formed from a slurry composition including zirconium silicate and silica with stucco layer of alumina is included.

High emittance shell molds for directional casting

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Scotia, NY, United States of America

Michael Francis Xavier Gigliotti