Patents by Inventor Marie T. Miglin

Marie T. Miglin 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).

  • Heat treatment of Alloy 718 for improved stress corrosion cracking resistance
    Patent number: 5244515
    Abstract: A method of increasing intergranular stress corrosion cracking resistance of Alloy 718 in water reactor environments is described where the alloy is heat treated at a high solution annealing temperature to dissolve grain boundary precipitates formed during thermomechanical processing. A water quenching step is advantageously employed following the high solution annealing. The alloy is then aged at two separate temperatures and finally air cooled to room temperature.
    Type: Grant
    Filed: March 3, 1992
    Date of Patent: September 14, 1993
    Assignee: The Babcock & Wilcox Company
    Inventor: Marie T. Miglin
  • Heat treatment of Alloy 718 for improved stress corrosion cracking resistance
    Patent number: 5047093
    Abstract: A method of increasing intergranular stress corrosion cracking resistance of Alloy 718 in water reactor environments is disclosed. The Alloy is heat treated at a high annealing temperature to dissolve .delta. precipitates. The absence of .delta. particles at the grain boundaries increases the elemental homogeneity at the boundaries and increases intergranular stress corrosion cracking resistance. In addition, the absence of .delta. phase at the grain boundaries decreases the crack propagation rate.
    Type: Grant
    Filed: June 9, 1989
    Date of Patent: September 10, 1991
    Assignee: The Babcock & Wilcox Company
    Inventors: William L. Kimmerle, Marie T. Miglin