ASTM F2005-05

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.
1.3 A definition is a single sentence with additional information included in a discussion. This standard is reviewed every five years, and the year of the last revision is appended.

General Information

• Status: Historical
• Publication Date: 30-Sep-2005
• 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 F2005-00 - Standard Terminology for Nickel-Titanium Shape Memory Alloys
• Effective Date: 01-Oct-2005
• Replaced By: ASTM F2005-05(2010) - Standard Terminology for Nickel-Titanium Shape Memory Alloys
• 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-Oct-2005
• 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-Oct-2005
• Referred By: ASTM F2063-18 - Standard Specification for Wrought Nickel-Titanium Shape Memory Alloys for Medical Devices and Surgical Implants
• Effective Date: 01-Oct-2005
• 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-Oct-2005
• Referred By: ASTM F2516-22 - Standard Test Method for Tension Testing of Nickel-Titanium Superelastic Materials
• Effective Date: 01-Oct-2005
• Referred By: ASTM F2004-17 - Standard Test Method for Transformation Temperature of Nickel-Titanium Alloys by Thermal Analysis
• Effective Date: 01-Oct-2005
• Referred By: ASTM E3097-23 - Standard Test Method for Uniaxial Constant Force Thermal Cycling of Shape Memory Alloys
• Effective Date: 01-Oct-2005
• 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-Oct-2005

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
Standard Terminology for
1
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
austenite,n—thehightemperatureparentphaseinNi-Tishape
used in ASTM documents relating to nickel-titanium shape
memory alloys with a B2 crystal structure. This phase
memory alloys used for medical devices. This terminology
transforms to R-phase or martensite, or both, on cooling.
includesonlythosetermsforwhichASTMeitherhasstandards
austenite finish temperature (A ), n—the temperature at
orwhichareusedinASTMstandardsfornickel-titaniumshape f
which the martensite to austenite transformation is com-
memory alloys. It is not intended to be an all-inclusive list of
pleted on heating in a single-stage transformation (Fig. 1)or
terms related to shape memory alloys.
the temperature at which the R-phase to austenite transfor-
1.2 Definitionsthataresimilartothosepublishedbyanother
mation is completed on heating in a two-stage transforma-
standards body are identified with abbreviations of the name of
tion (Fig. 2).
that organization; for example, ICTAC is the International
austenite peak temperature (A ), n—the temperature of the
p
Confederation for Thermal Analysis and Calorimetry.
endothermic peak position on the differential scanning
1.3 A definition is a single sentence with additional infor-
calorimeter (DSC) curve upon heating for the martensite to
mation included in a discussion. This standard is reviewed
austenite transformation in a single-stage transformation
every five years, and the year of the last revision is appended.
(Fig. 1) or the temperature of the endothermic peak position
2. Referenced Documents
on the DSC curve upon heating for the R-phase to austenite
2
transformation in a two-stage transformation (Fig. 2).
2.1 ASTM Standards:
austenite start temperature (A ), n—the temperature at
E7 Terminology Relating to Metallography s
which the martensite to austenite transformation begins on
E473 Terminology Relating to Thermal Analysis and Rhe-
heating in a single-stage transformation (Fig. 1)orthe
ology
temperatureatwhichtheR-phasetoaustenitetransformation
F2004 Test Method for Transformation Temperature of
begins on heating in a two-stage transformation (Fig. 2).
Nickel-Titanium Alloys by Thermal Analysis
bend and free recovery (BFR), n—a test method for deter-
F2082 Test Method for Determination of Transformation
mining austenite transformation temperatures on heating.
Temperature of Nickel-Titanium Shape MemoryAlloys by
Bend and Free Recovery
DISCUSSION—The test involves cooling a wire or tube specimen
below the M temperature, deforming the specimen in a controlled
f
3. Terminology
fashion, then heating through the austenite transformation. By measur-
ing the shape memory response of the specimen A and A , tempera-
s f
active austenite finish temperature, n—term used to denote
tures can be determined. This test method is covered in Test Method
austenite finish temperature of a finished wire, tube, or
F2082.
component as determined by a bend and free recovery
differential scanning calorimeter (DSC), n—a device that is
method rather than by DSC.
capable of heating a test specimen and a reference at a
alloy phase, n—in a shape memory alloy, the crystal structure
controlledrateandofautomaticallymeasuringthedifference
stable at a particular temperature and stress.
in heat flow between the specimen and the reference both to
the required sensitivity and precision.
1
ThisterminologyisunderthejurisdictionofASTMCommitteeF04onMedical
differential scanning calorimetry (DSC), n—a technique in
and Surgical Devices and is the direct responsibility of Subcommittee F04.12 on
which the difference in heat flow into or out of a substance
Metallurgical Materials.
and an inert reference is measured as a function of tempera-
Current edition approved Oct. 1, 2005. Published October 2005. Originally
approved in 2000. Last previous edition approved in 2000 as F2005 – 00. DOI:
ture while the substance and the reference material are
10.1520/F2005-05.
subjected to a controlled temperature program. This test
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
method, as it applies to Ni-Ti shape memory alloys, is
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright
...