Patents by Inventor Peter Damian Hodgson

Peter Damian Hodgson 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: 6027587
    Abstract: Steel with ultrafine grains is produced by altering the transformation from one which normally proceeds with grain boundary nucleation followed by intragranular nucleation at deformation bands and other defects, to one which induces a substantially instantaneous transformation homogeneously over the austenite grain. This is favoured by a reduction or minimisation of grain boundary nucleation, (for example by enlargement of the austenite grain size), prior to or during the transformation. In an embodiment, a partially cooled austenite phase steel is deformed in a single pass at a temperature in the range of 700-950.degree. C. to obtain ferrite grain size of 5 .mu.m or less.
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: February 22, 2000
    Assignee: The Broken Hill Proprietary Company Limited
    Inventors: Peter Damian Hodgson, Mark Richard Hickson, Russell Keith Gibbs