Methods and apparatus for stress relief using multiple energy sources

  • US 7,175,722 B2
  • Filed: 07/31/2003
  • Issued: 02/13/2007
  • Est. Priority Date: 08/16/2002
  • Status: Active Grant
First Claim
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1. A method of changing a physical property of a structure, comprising:

  • providing a first energy to a structure by performing a first energy process according to an operational setting, at least one of the operational setting and a time value being selected according to a first order rate relationship for the first energy process, according to a first order rate relationship for a second energy process, and according to a desired physical property value; and

    providing a second energy to the structure by performing the second energy process;

    wherein the first and second energy processes are performed concurrently for at least the time value;

    wherein the first order rate relationship for the first energy process relates application of the first energy to the structure and a physical property of the structure;

    wherein the first order rate relationship for the second energy process relates application of the second energy to the structure and the physical property;

    wherein the first and second energies are different;

    wherein the total energy provided to the structure by the first and second energy processes is above an activation energy for the material of the structure;

    wherein the first energy is thermal and wherein the second energy is oscillatory;

    wherein the operational setting is a temperature setting, wherein one of the temperature setting and the time value is selected according to the first order rate relationship for the first energy process, according to the first order rate relationship for the second energy process, according to the desired physical property value, and according to the other one of the temperature setting and the time value; and

    wherein the first order rate relationship for the first energy process is a first Larson Miller relationship that relates application of thermal energy to the structure and the physical property, and wherein the first order rate relationship for the second energy process is a second Larson Miller relationship that relates application of oscillatory energy to the structure and the physical property.

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