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Dilip N Shah, James Thompson Beals, John Joseph Marcin Jr, Stephen Douglas Murray: Cores for use in precision investment casting. United Technologies Corporation, McCormick Paulding & Huber, October 28, 2003: US06637500 (89 worldwide citation)

Concepts for fabricating improved cores for investment casting are described. The cores are composite which include refractory metal elements and ceramic elements. The refractory metal elements are provided to enhance the mechanical properties of the core and/or to permit the fabrication of cores ha ...


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John Joseph Marcin Jr, Justin Andreas Neutra, David Henry Abbott, James Peter Aduskevich, Dilip M Shah, Dorothea Nadette Carraway, Raymond Paul Langevin, Marc R Sauerhoefer, Richard Alan Stone: Crack free metallic articles. United Technologies Corporation, John E Whitman Breed Abbott & Morgan Boyd Esq, August 15, 2000: US06103402 (24 worldwide citation)

A containerless method of producing a crack free metallic article of near-net shape includes melting a filler material into a metallic substrate or seed under conditions chosen to preclude cracking. In a preferred embodiment of the invention, a laser beam is operated at a relatively low power densit ...


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John Joseph Marcin Jr, Justin Andreas Neutra, David Henry Abbott, James Peter Aduskevich, Dilip M Shah, Dorothea Nadette Carraway, Raymond Paul Langevin, Marc R Sauerhoefer, Richard Alan Stone: Method of repairing metallic articles by energy beam deposition with reduced power density. United Technologies Corporation, Brooks Haidt Haffner & Delahunty, June 22, 1999: US05914059 (22 worldwide citation)

A filler material is melted into a metallic substrate having a defect under conditions chosen to preclude cracking. In a preferred embodiment of the invention, a laser beam is operated at a relatively low power density and at a relatively large diameter for an extended length of time to produce a mo ...


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John Joseph Marcin Jr, Justin Andreas Neutra, David Henry Abbott, James Peter Aduskevich, Dilip M Shah, Dorothea Nadette Carraway, Raymond Paul Langevin, Marc R Sauerhoefer, Richard Alan Stone: Containerless method of producing crack free metallic articles by energy beam deposition with reduced power density. United Technologies Corporation, Brooks Haidt Haffner & Delahunty, May 4, 1999: US05900170 (21 worldwide citation)

A containerless method of producing a crack free metallic article of near-net shape includes melting a filler material into a metallic substrate or seed under conditions chosen to preclude cracking. In a preferred embodiment of the invention, a laser beam is operated at a relatively low power densit ...


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John J Schirra, Ralph Giugno, Walter Frederick Gustafson, John Joseph Marcin Jr, Jeffery William Samuelson, Delwyn Earle Norton: Die cast nickel base superalloy articles. F Tyler Morrison, Pratt & Whitney, January 17, 2002: US20020005233-A1

A die cast article such is composed of nickel base superaloy IN 718 is disclosed. The microstructure is characterized by an absence of flowlines and includes a fine average grain size, e.g., ASTM 3 or smaller. Exemplary articles include gas turbine engine components, such as blades, vanes, cases and ...


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John Joseph Marcin Jr, Justin Andreas Neutra, David Henry Abbott, James Peter Aduskevich, Dilip M Shah: The container-less producing method for single crystal metal article, crack free metal article. United Technologies Corporation, June 1, 1998: TW332789

A container-less producing method by using energy to produce single crystal metallic, it is using the energy having diameter between 1"" to 4"", and under the specific condition of excluding crack that has the low power density between 10 w/cm2 and 104 w/cm2. And melt filling-material into substrate ...


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John Joseph Marcin Jr, Justin Andreas Neutra, David Henry Abbott, James Peter Aduskevich, Dilip M Shah: Method of repairing single crystal metallic articles. United Technologies Corporation, February 1, 1998: TW326009

A method of repairing defects in a single crystal metallic article, which comprises using an energy source with a relatively large diameter of between about 0.1 inch (0.254 cm) and about 4 inches (10 cm) at a low power density of between about 10W/cm2 (10J/sec-cm2) and about 104W/cm2 (104J/sec-cm2) ...


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