ASTM F2005-05(2010)

Standard Terminology for Nickel-Titanium Shape Memory Alloys

SCOPE
1.1 This terminology is a compilation of definitions of terms used in ASTM documents relating to nickel-titanium shape memory alloys used for medical devices. This terminology includes only those terms for which ASTM either has standards or which are used in ASTM standards for nickel-titanium shape memory alloys. It is not intended to be an all-inclusive list of terms related to shape memory alloys.
1.2 Definitions that are similar to those published by another standards body are identified with abbreviations of the name of that organization; for example, ICTAC is the International Confederation for Thermal Analysis and Calorimetry.

General Information

• Status: Historical
• Publication Date: 30-Nov-2010
• ICS: 77.120.40 - Nickel, chromium and their alloys
• ICS: 77.120.50 - Titanium and titanium alloys
• Technical Committee: F04 - Medical and Surgical Materials and Devices
• Drafting Committee: F04.12 - Metallurgical Materials

Relations

• Replaces: ASTM F2005-05 - Standard Terminology for Nickel-Titanium Shape Memory Alloys
• Effective Date: 01-Dec-2010
• Referred By: ASTM F2633-19 - Standard Specification for Wrought Seamless Nickel-Titanium Shape Memory Alloy Tube for Medical Devices and Surgical Implants
• Effective Date: 01-Dec-2010
• Referred By: ASTM F2819-10(2015)e2 - Standard Test Methods for Measurement of Straightness of Bar, Rod, Tubing and Wire to be used for Medical Devices
• Effective Date: 01-Dec-2010
• Referred By: ASTM E3097-23 - Standard Test Method for Uniaxial Constant Force Thermal Cycling of Shape Memory Alloys
• Effective Date: 01-Dec-2010
• Referred By: ASTM F2082/F2082M-16 - Standard Test Method for Determination of Transformation Temperature of Nickel-Titanium Shape Memory Alloys by Bend and Free Recovery
• Effective Date: 01-Dec-2010
• Referred By: ASTM E3098-17 - Standard Test Method for Mechanical Uniaxial Pre-strain and Thermal Free Recovery of Shape Memory Alloys
• Effective Date: 01-Dec-2010
• Referred By: ASTM F2004-17 - Standard Test Method for Transformation Temperature of Nickel-Titanium Alloys by Thermal Analysis
• Effective Date: 01-Dec-2010
• Referred By: ASTM F2063-18 - Standard Specification for Wrought Nickel-Titanium Shape Memory Alloys for Medical Devices and Surgical Implants
• Effective Date: 01-Dec-2010
• Referred By: ASTM F2516-22 - Standard Test Method for Tension Testing of Nickel-Titanium Superelastic Materials
• Effective Date: 01-Dec-2010

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: F2005 − 05(Reapproved 2010)
Standard Terminology for
Nickel-Titanium Shape Memory Alloys
This standard is issued under the fixed designation F2005; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope anneal, v—to heat treat in order to remove the effect of
cold-working.
1.1 Thisterminologyisacompilationofdefinitionsofterms
used in ASTM documents relating to nickel-titanium shape
austenite,n—the high temperature parent phase in Ni-Ti shape
memory alloys used for medical devices. This terminology
memory alloys with a B2 crystal structure. This phase
includesonlythosetermsforwhichASTMeitherhasstandards
transforms to R-phase or martensite on cooling.
orwhichareusedinASTMstandardsfornickel-titaniumshape
austenite finish temperature (A ), n—the temperature at
memory alloys. It is not intended to be an all-inclusive list of f
which the martensite to austenite transformation is com-
terms related to shape memory alloys.
pleted on heating in a single-stage transformation (Fig. 1)or
1.2 Definitionsthataresimilartothosepublishedbyanother
the temperature at which the R-phase to austenite transfor-
standards body are identified with abbreviations of the name of
mation is completed on heating in a two-stage transforma-
that organization; for example, ICTAC is the International
tion (Fig. 2).
Confederation for Thermal Analysis and Calorimetry.
austenite peak temperature (A ), n—the temperature of the
p
2. Referenced Documents
endothermic peak position on the differential scanning
calorimeter (DSC) curve upon heating for the martensite to
2.1 ASTM Standards:
austenite transformation in a single-stage transformation
E7 Terminology Relating to Metallography
(Fig. 1) or the temperature of the endothermic peak position
E473 Terminology Relating to Thermal Analysis and Rhe-
on the DSC curve upon heating for the R-phase to austenite
ology
transformation in a two-stage transformation (Fig. 2).
F2004 Test Method for Transformation Temperature of
Nickel-Titanium Alloys by Thermal Analysis
austenite start temperature (A), n—the temperature at
s
F2082 Test Method for Determination of Transformation
which the martensite to austenite transformation begins on
Temperature of Nickel-Titanium Shape Memory Alloys
heating in a single-stage transformation (Fig. 1)orthe
by Bend and Free Recovery (Withdrawn 2015)
temperatureatwhichtheR-phasetoaustenitetransformation
begins on heating in a two-stage transformation (Fig. 2).
3. Terminology
bend and free recovery (BFR), n—a test method for deter-
active austenite finish temperature, n—term used to denote
mining austenite transformation temperatures on heating.
austenite finish temperature of a finished wire, tube, or
DISCUSSION—The test involves cooling a wire or tube specimen
component as determined by a bend and free recovery
below the M temperature, deforming the specimen in a controlled
f
method rather than by DSC.
fashion, then heating through the austenite transformation. By measur-
ing the shape memory response of the specimen A and A , tempera-
s f
alloy phase, n—in a shape memory alloy, the crystal structure
tures can be determined. This test method is covered in Test Method
stable at a particular temperature and stress.
F2082.
differential scanning calorimeter (DSC), n—a device that is
ThisterminologyisunderthejurisdictionofASTMCommitteeF04onMedical
capable of heating a test specimen and a reference at a
and Surgical Materials and Devicesand is the direct responsibility of Subcommittee
controlledrateandofautomaticallymeasuringthedifference
F04.12 on Metallurgical Materials.
in heat flow between the specimen and the reference both to
Current edition approved Dec. 1, 2010. Published February 2011. Originally
the required sensitivity and precision.
approved in 2000. Last previous edition approved in 2005 as F2005 – 05. DOI:
10.1520/F2005-05R10.
differential scanning calorimetry (DSC), n—a technique in
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
which the difference in heat flow into or out of a substance
Standards volume information, refer to the standard’s Document Summary page on
and an inert reference is measured as a function of tempera-
the ASTM website.
ture while the substance and the reference material are
The last approved version of this historical standard is referenced on
www.astm.org. subjected to a controlled temperature program. This test
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F2005 − 05 (2010)
martensite finish temperature (M ), n—the temperature at
f
which the transformation from austenite to martensite is
completed on cooling in a single-stage transformation (Fig.
1) or the temperature at which the transformation from
R-phase to martensite is completed on cooling in a two-stage
transformation (Fig. 2).
martensite peak temperature (M ),n—thetemperatureofthe
p
exothermic peak position on the DSC curve upon cooling for
the austenite to martensite transformation (Fig. 1)orthe
R-phase to martensite transformation (Fig. 2).
martensite start temperature (M ), n—the temperature at
s
which the transformation
...