公开(公告)号：WO1996030552A1

公开(公告)日：1996-10-03

申请号：PCT/US1996003850

申请日：1996-03-22

Applicant: ALLIEDSIGNAL INC.

Inventor： ALLIEDSIGNAL INC. ,  LASALLE, Jerry, Capriotti ,  DAS, Santosh, Kumar

IPC: C22C14/00

CPC classification number: C22C14/00

Abstract: A gamma titanium aluminide alloy has a composition consisting essentially of the formula Ti-AlaCrbNbcSid, where "a", "b", "c" and "d" are in atomic percent, "a" ranges from about 44 to about 48, "b" ranges from about 2 to about 6; "c" ranges from about 2 to about 6 and "d" ranges from about 0.5 to about 1.0. The alloy is castable into molds containing fine detail and sharp angle. Molded parts composed of the alloy exhibit excellent strength and toughness.

Abstract translation: 一种γ钛铝化合物的组成基本上由式Ti-AlaCrbNbcSid组成，其中“a”，“b”，“c”和“d”为原子百分数，“a”为约44至约48， b“为约2至约6; “c”为约2至约6，“d”为约0.5至约1.0。 该合金可浇铸成具有细小细度和锐角的模具。 由合金组成的模制件具有优异的强度和韧性。

公开(公告)号：WO1996030551A1

公开(公告)日：1996-10-03

申请号：PCT/US1996001688

申请日：1996-03-28

Applicant: ALLIEDSIGNAL INC.

Inventor： ALLIEDSIGNAL INC. ,  LASALLE, Jerry, Capriotti ,  DAS, Santosh, Kumar ,  BARRY, Eoin, Joseph ,  JEVONS, David, Gerorge ,  SNOW, Brian, Jeffrey

IPC: C22C14/00

CPC classification number: C22C14/00

Abstract: A gamma titanium aluminide rotor is produced from an alloy consisting essentially of the formula Ti-AlaCrbNbcSid, where "a", "b", "c" and "d" are in atomic percent, "a" ranges from about 44 to about 48, "b" ranges from about 2 to about 6, "c" ranges from about 2 to about 6 and "d" ranges from about 0.5 to about 1.0. The alloy is castable into a mold to thereby form the rotor. Advantageously, the mold can contain fine detail and sharp angle. Molded rotors composed of the alloy exhibit excellent strength and toughness.

Abstract translation: 基本上由式Ti-AlaCrbNbcSid组成的合金制备γ钛铝化物转子，其中“a”，“b”，“c”和“d”为原子百分比，“a”为约44至约48 ，“b”为约2至约6，“c”为约2至约6，“d”为约0.5至约1.0。 该合金可铸造成模具从而形成转子。 有利地，模具可以包含精细的细节和锐利的角度。 由合金组成的模制转子表现出优异的强度和韧性。

公开(公告)号：EP0229075B1

公开(公告)日：1989-09-27

申请号：EP86902711.0

申请日：1986-04-11

Applicant: AlliedSignal Inc.

Inventor： KIM, Nack, Joon ,  ADAM, Colin, McLean ,  BYE, Richard, Lister, Jr. ,  DAS, Santosh, Kumar

IPC: C22C21/00 ,  C22F1/04

CPC classification number: C22C21/00

Abstract: A process for making high strengh, high ductility, low density aluminum-base alloys, consisting essentially of 2,5 to 5 wt % Li, 0,15 to 2 wt % Zr, 0 to 5 wt % of at least one element selected from the group consisting of Cu, Mg, Si, Se, Ti, U, Hf, Be, Cr, V, Mn, Fe, Co, Ni, balance Al. The alloy is given multiple aging treatments after being solutionized. The microstructure of the alloy is characterized by the precipitation of a composite phase in the aluminum matrix thereof.

公开(公告)号：EP0471798B1

公开(公告)日：1993-06-23

申请号：EP90911041.3

申请日：1990-04-30

Applicant: AlliedSignal Inc.

Inventor： DAS, Santosh, Kumar ,  BYE, Richard, Lister, Jr. ,  LOBOVSKY, Alexander

IPC: B22D11/06

CPC classification number: B22D11/064

Abstract: An apparatus for melting and rapid solidification casting of metal alloys has a crucible (2) for molding a metal charge. The crucible has side walls (3), a top (7) and a bottom (20) having an orifice (5) therein. Collectively, the side walls, top and bottom define an interior of the crucible. A portion of the dimensions of the side walls and bottom is divided by longitudinal slits (11) into at least two segments. A nozzle (8) is disposed partially within the crucible and extends through the orifice. The nozzle has a first end (24) in communication with the interior (22) of the crucible. A second end (26) of the nozzle has a nozzle orifice (28) therein for defining a stream of molten metal alloy. A cooling mechanism (4) cools the top, side walls and bottom of the crucible. The apparatus has mechanisms (30, 32, 34) for inducing alternating electrical currents within the metal charge and within the nozzle, and for establishing and maintaining pressure within the interior of the crucible. A positioning mechanism (10) positions the crucible and nozzle means relative to a quenching mechanism (36) that includes a rapidly moving chill substrate. The crucible, nozzle and quenching mechanism are housed within an enclosure (1) that provides therewithin a controlled atmosphere having positive or negative pressure.

公开(公告)号：EP0417206A1

公开(公告)日：1991-03-20

申请号：EP89908321.0

申请日：1989-05-04

Applicant: AlliedSignal Inc.

Inventor： DAS, Santosh, Kumar ,  CHANG, Chin-Fong ,  RAYBOULD, Derek

IPC: C22C23 ,  C22C1 ,  C22F1

CPC classification number: C22F1/06 ,  C22C1/0408 ,  C22C23/02 ,  Y10S420/902

Abstract: Une pièce complexe, composée d'un alliage métallique à base de magnésium solidifié rapidement, est produite par formage superplastique à une température comprise entre 160°C et 275°C et à une vitesse comprise entre 0,00021 m/s à 0,00001 m/s, de façon à améliorer sa mouillabilité et à permettre son formage à des températures inférieures. L'alliage à base de magnésium solidifié rapidement contient des phases intermétalliques de terres rares de magnésium et d'aluminium finement dispersées et à granulométrie fine. Lorsqu'elle est formée, la pièce présente une bonne résistance à la corrosion ainsi qu'une résistance élevée à la rupture par traction et une bonne ductilité à température ambiante, propriétés qui, combinées, sont de loin supérieures à celles des alliages au magnésium traditionnels. Une telle pièce est appropriée pour servir d'élément de structure dans des hélicoptères, des missiles et des cellules d'avion où une bonne résistance à la corrosion alliée à une solidité et une ductilité élevées est importante.