ASTM WK46336

    Revision of F2082 - 06 Standard Test Method for Determination of Transformation Temperature of Nickel-Titanium Shape Memory Alloys by Bend and Free Recovery

    (What is a Work Item?)

    Active Standard: F2082 - 06

    Developed by Subcommittee: F04.15 | Committee F04 | Contact Staff Manager



    WK46336

    1. Rationale

    This revision adds another transformation temperature term, A95, defined as the point where the specimen is 95% recovered. When there is retained cold-work in the specimen, the recovery curve can exhibit a region of reduced slope near the end of the recovery. When using the traditional tangent method on such a curve, the tangent is drawn to the steepest portion of the curve, resulting in an Af value that is far from the point of full recovery. Use of A95 instead of Af may be preferred in these cases.


    Keywords

    free recovery; nickel titanium; nitinol; shape memory; transformation temperature;
    Citing ASTM Standards
    Back to Top
    Work Item Status

    Date Initiated:
    06-03-2014

    Technical Contact:
    James Carlson

    Item:
    011

    Ballot:
    F04 (14-05)

    Status:
    Ballot Item Approved