Method of preparing a two-way shape memory alloy

Johnson, Alfred D

Title: Method of preparing a two-way shape memory alloy

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Abstract

A two-way shape memory alloy, a method of training a shape memory alloy, and a heat engine employing the two-way shape memory alloy to do external work during both heating and cooling phases. The alloy is heated under a first training stress to a temperature which is above the upper operating temperature of the alloy, then cooled to a cold temperature below the zero-force transition temperature of the alloy, then deformed while applying a second training stress which is greater in magnitude than the stress at which the alloy is to be operated, then heated back to the hot temperature, changing from the second training stress back to the first training stress.

Inventors:

Johnson, Alfred D ^[1]

5383 Bancroft Ave., Oakland, CA 94601

Issue Date:: 1984-01-01

Research Org.:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

OSTI Identifier:: 864906

Patent Number(s):: 4435229

Assignee:: Johnson, Alfred D. (5383 Bancroft Ave., Oakland, CA 94601)

Patent Classifications (CPCs):: C - CHEMISTRY C22 - METALLURGY C22F - CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS

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C - CHEMISTRY C22 - METALLURGY C22F - CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
C22F1/006 - {Resulting in heat recoverable alloys with a memory effect}

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DOE Contract Number:: W-7405-ENG-48

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: method; preparing; two-way; shape; memory; alloy; training; heat; engine; employing; external; heating; cooling; phases; heated; stress; temperature; upper; operating; cooled; cold; below; zero-force; transition; deformed; applying; magnitude; operated; hot; changing; memory alloy; heat engine; temperature below; operating temperature; shape memory; transition temperature; two-way shape; cold temperature; /148/

Citation Formats


                    Johnson, Alfred D. Method of preparing a two-way shape memory alloy.  United States: N. p., 1984. 
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                    Johnson, Alfred D. Method of preparing a two-way shape memory alloy.  United States.

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                    Johnson, Alfred D. Sun .  
        "Method of preparing a two-way shape memory alloy".  United States.  https://www.osti.gov/servlets/purl/864906.

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@article{osti_864906,

  title        = {Method of preparing a two-way shape memory alloy},

  author       = {Johnson, Alfred D},

  abstractNote = {A two-way shape memory alloy, a method of training a shape memory alloy, and a heat engine employing the two-way shape memory alloy to do external work during both heating and cooling phases. The alloy is heated under a first training stress to a temperature which is above the upper operating temperature of the alloy, then cooled to a cold temperature below the zero-force transition temperature of the alloy, then deformed while applying a second training stress which is greater in magnitude than the stress at which the alloy is to be operated, then heated back to the hot temperature, changing from the second training stress back to the first training stress.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1984},

  month        = {1}

}

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