Patents by Inventor Susil K. Putatunda

Susil K. Putatunda 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).

  • Development of nanostructure austempered ductile iron with dual phase microstructure
    Patent number: 10066278
    Abstract: A method for forming an austempered iron composition with a nanoscale microstructure includes a step of heating an iron-carbon-silicon alloy with silicon to a first temperature that is lower than A1 for the iron-carbon-silicon alloy. The iron-carbon-silicon alloy is then adiabatically deformed such that the temperature of the iron-carbon-silicon alloy rises to a second temperature which is sufficient to form proeutectoid ferrite and austenite. The iron-carbon-silicon alloy is cooled to a first austempering temperature. The iron-carbon-silicon alloy is then heated to a second austempering temperature that is greater than the first austempering temperature to form a dual phase microstructure. Characteristically, the dual phase microstructure includes proeutectoid ferrite and ausferrite.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: September 4, 2018
    Assignee: Wayne State University
    Inventor: Susil K. Putatunda
  • DEVELOPMENT OF NANOSTRUCTURE AUSTEMPERED DUCTILE IRON WITH DUAL PHASE MICROSTRUCTURE
    Publication number: 20160032430
    Abstract: A method for forming an austempered iron composition with a nanoscale microstructure includes a step of heating an iron-carbon-silicon alloy with silicon to a first temperature that is lower than A1 for the iron-carbon-silicon alloy. The iron-carbon-silicon alloy is then adiabatically deformed such that the temperature of the iron-carbon-silicon alloy rises to a second temperature which is sufficient to form proeutectoid ferrite and austenite. The iron-carbon-silicon alloy is cooled to a first austempering temperature. The iron-carbon-silicon alloy is then heated to a second austempering temperature that is greater than the first austempering temperature to form a dual phase microstructure. Characteristically, the dual phase microstructure includes proeutectoid ferrite and ausferrite.
    Type: Application
    Filed: March 17, 2014
    Publication date: February 4, 2016
    Inventor: Susil K. PUTATUNDA
  • Development of a high strength high toughness steel
    Patent number: 8657972
    Abstract: A bainitic steel with simultaneous high yield strength and high fracture toughness includes at least 5 volume percent austenite as well as iron, carbon, and silicon. The silicon is present in an amount of at least 1.5 weight percent of total weight of the bainitic steel. A method of forming the steel by austempering is also provided.
    Type: Grant
    Filed: December 24, 2008
    Date of Patent: February 25, 2014
    Assignee: Wayne State University
    Inventor: Susil K. Putatunda
  • DEVELOPMENT OF A HIGH STRENGTH HIGH TOUGHNESS BAINITIC STEEL
    Publication number: 20110114233
    Abstract: A bainitic steel with simultaneous high yield strength and high fracture toughness includes at least 5 volume percent austenite as well as iron, carbon, and silicon. The silicon is present in an amount of at least 1.5 weight percent of total weight of the bainitic steel. A method of forming the steel by austempering is also provided.
    Type: Application
    Filed: December 24, 2008
    Publication date: May 19, 2011
    Applicant: WAYNE STATE UNIVERSITY
    Inventor: Susil K. Putatunda