Patents by Inventor David J. Rowenhorst

David J. Rowenhorst 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).

  • MULTI NANO-PRECIPITATE STRENGTHENED AUSTENITIC STEEL
    Publication number: 20210262074
    Abstract: Disclosed is an alloy having 7-30 wt. % manganese, 1-15 wt. % nickel, 1-10 wt. % aluminum, 1-8 wt. % copper, 0-15 wt. % chromium, 0-5 wt. % molybdenum, 0-3 wt. % vanadium, 0-3 wt. % titanium, 0-3 wt. % niobium, 0-2 wt. % silicon, 0-1 wt. % carbon, and balance of iron. A majority of the iron is ?-Fe. The alloy has ?-NiAl precipitates and Cu-rich precipitates. At least 95 vol. % of the ?-NiAl precipitates have a maximum dimension of 500 nm or less. The Cu-rich precipitates are at least 40 at. % copper. The alloy can be made by thermal processing steps without mechanical processing steps.
    Type: Application
    Filed: February 24, 2021
    Publication date: August 26, 2021
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Colin A. Stewart, Richard W. Fonda, David J. Rowenhorst, Paul K. Lambert