ASTM C1368-10

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Designation:C1368–06 Designation: C1368 – 10
Standard Test Method for
Determination of Slow Crack Growth Parameters of
Advanced Ceramics by Constant Stress-Rate
1
FlexuralStrength Testing at Ambient Temperature
This standard is issued under the fixed designation C1368; 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*
1.1 This test method covers the determination of slow crack growth (SCG) parameters of advanced ceramics by using constant
stress-rate rectangular beam flexural testing in which testing, or ring-on-ring biaxial disk flexural testing, or direct tensile strength,
in which strength is determined as a function of applied stress rate in a given environment at ambient temperature. The strength
degradation exhibited with decreasing applied stress rate in a specified environment is the basis of this test method which enables
the evaluation of slow crack growth parameters of a material.
2
NOTE 1—This test method is frequently referred to as “dynamic fatigue” testing (Refs (1-3) ) in which the term “fatigue” is used interchangeably with
the term “slow crack growth.” To avoid possible confusion with the “fatigue” phenomenon of a material which occurs exclusively under cyclic loading,
as defined in DefinitionsTerminology E1823, this test method uses the term “constant stress-rate testing” rather than “dynamic fatigue” testing.
NOTE 2—In glass and ceramics technology, static tests of considerable duration are called “static fatigue” tests, a type of test designated as
stress-rupture (See DefinitionsTerminology E1823).
1.2 Values expressed in this test method are in accordance with the International System of Units (SI) and IEEE/ASTM SI 10.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
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2.1 ASTM Standards:
C1145 Terminology of Advanced Ceramics
C1161 Test Method for Flexural Strength of Advanced Ceramics at Ambient Temperature
C1239 Practice for Reporting Uniaxial Strength Data and Estimating Weibull Distribution Parameters forAdvanced Ceramics
C1273 Test Method for Tensile Strength of Monolithic Advanced Ceramics at Ambient Temperatures
C1322 Practice for Fractography and Characterization of Fracture Origins in Advanced Ceramics
C1499 Test Method for Monotonic Equibiaxial Flexural Strength of Advanced Ceramics at Ambient Temperature
E4 Practices for Force Verification of Testing Machines
E6 Terminology Relating to Methods of Mechanical Testing
E337 Test Method for Measuring Humidity with a Psychrometer (the Measurement of Wet- and Dry-Bulb Temperatures)
IEEE/ASTMSI10American National Standard for Use of the International System of Units (SI): The Modern Metric System
E1823 Terminology Relating to Fatigue and Fracture Testing Terminology Relating to Fatigue and Fracture Testing
IEEE/ASTM SI 10 American National Standard for Use of the International System of Units (SI): The Modern Metric System
3. Terminology
3.1 Definitions—The terms described in Terminologyies C1145, Terminology , E6, Terminology E616, and Definitions , and
E1823 are applicable to this test method. Specific terms relevant to this test method are as follows:
3.1.1 advanced ceramic, n—a highly engineered, high-performance, predominately nonmetallic, inorganic, ceramic material
having specific functional attributes. (C1145)
1
This test method is under the jurisdiction of ASTM Committee C28 on Advanced Ceramics and is the direct responsibility of Subcommittee C28.01 on Mechanical
Properties and Performance.
Current edition approved Jan.Dec. 1, 2006.2010. Published January 2006.2011. Originally approved in 1997. Last previous edition approved in 20012006 as C1368 – 016.
DOI: 10.1520/C1368-106.
2
The boldface numbers in parentheses refer to the list of references at the end of this standard.
3
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard.
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