Patents by Inventor Ella Rehtanz

Ella Rehtanz has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7976649
    Abstract: A method of fabricating a superplastically formable strip or a superplastically formable foil from TiAl6V4 with a thickness of no more than 0.9 mm, preferably less than or equal to 0.5 mm, comprises the steps: a) hot rolling a sheet metal made of TiAl6V4; b) thermal pre-treatment of the hot-rolled sheet metal at a temperature between 650 and 850° C.; and c) cold rolling the hot-rolled and thermally pre-treated sheet metal at a forming rate of at least 30%, wherein the forming rate per single pass amounts to between 1 and 15%, to form a strip or a foil with a thickness of no more than 0.9 mm, wherein the cold-rolled strip or the cold-rolled foil is not annealed.
    Type: Grant
    Filed: August 20, 2008
    Date of Patent: July 12, 2011
    Assignee: GfE Fremat GmbH
    Inventors: Joachim Klose, Ella Rehtanz, Christiane Rothe, Ines Eulitz, Werner Beck
  • Publication number: 20090050242
    Abstract: A method of fabricating a superplastically formable strip or a superplastically formable foil from TiAl6V4 with a thickness of no more than 0.9 mm, preferably less than or equal to 0.5 mm, comprises the steps: a) hot rolling a sheet metal made of TiAl6V4; b) thermal pre-treatment of the hot-rolled sheet metal at a temperature between 650 and 850° C.; and c) cold rolling the hot-rolled and thermally pre-treated sheet metal at a forming rate of at least 30%, wherein the forming rate per single pass amounts to between 1 and 15%, to form a strip or a foil with a thickness of no more than 0.9 mm, wherein the cold-rolled strip or the cold-rolled foil is not annealed.
    Type: Application
    Filed: August 20, 2008
    Publication date: February 26, 2009
    Inventors: Joachim KLOSE, Ella REHTANZ, Christiane ROTHE, Ines EULITZ, Werner BECK