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

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 are disclosed. 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. 8 figs.

Inventors:
Issue Date:
OSTI Identifier:
7007585
Patent Number(s):
4435229 A
Application Number:
PPN: US 6-308127
Assignee:
PTO; EDB-94-123887
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Resource Relation:
Patent File Date: 2 Oct 1981
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALLOYS; FABRICATION; SHAPE MEMORY EFFECT; HEAT ENGINES; TEMPERATURE DEPENDENCE; ENGINES; 360101* - Metals & Alloys- Preparation & Fabrication; 360102 - Metals & Alloys- Structure & Phase Studies

Citation Formats

Johnson, A.D. Method of preparing a two-way shape memory alloy. United States: N. p., 1984. Web.
Johnson, A.D. Method of preparing a two-way shape memory alloy. United States.
Johnson, A.D. Tue . "Method of preparing a two-way shape memory alloy". United States.
@article{osti_7007585,
title = {Method of preparing a two-way shape memory alloy},
author = {Johnson, A.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 are disclosed. 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. 8 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1984},
month = {3}
}