Invention Grant
US08409372B1 Thermomechanical methodology for stabilizing shape memory alloy (SMA) response
有权
用于稳定形状记忆合金(SMA)响应的热力学方法
- Patent Title: Thermomechanical methodology for stabilizing shape memory alloy (SMA) response
- Patent Title (中): 用于稳定形状记忆合金(SMA)响应的热力学方法
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Application No.: US12874523Application Date: 2010-09-02
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Publication No.: US08409372B1Publication Date: 2013-04-02
- Inventor: Santo A Padula, II
- Applicant: Santo A Padula, II
- Applicant Address: US DC Washington
- Assignee: The United States of America as Represented by the Administraton of National Aeronautics and Space Administration
- Current Assignee: The United States of America as Represented by the Administraton of National Aeronautics and Space Administration
- Current Assignee Address: US DC Washington
- Agent Robert H. Earp, III
- Main IPC: C22F1/00
- IPC: C22F1/00 ; C21D1/54 ; C21D1/55

Abstract:
Methods and apparatuses for stabilizing the strain-temperature response for a shape memory alloy are provided. To perform stabilization of a second sample of the shape memory alloy, a first sample of the shape memory alloy is selected for isobaric treatment and the second sample is selected for isothermal treatment. When applying the isobaric treatment to the first sample, a constant stress is applied to the first sample. Temperature is also cycled from a minimum temperature to a maximum temperature until a strain on the first sample stabilizes. Once the strain on the first sample stabilizes, the isothermal treatment is performed on the second sample. During isothermal treatment, different levels of stress on the second sample are applied until a strain on the second sample matches the stabilized strain on the first sample.
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