ASTM E1681-03

Standard Test Method for Determining a Threshold Stress Intensity Factor for Environment-Assisted Cracking of Metallic Materials

SCOPE
1.1 This test method covers the determination of the environment-assisted cracking threshold stress intensity factor parameters, KIEAC and KEAC, for metallic materials from constant-load testing of fatigue precracked beam or compact fracture specimens.  
1.2 This test method is applicable to environment-assisted cracking in aqueous or other aggressive environments.  
1.3 Materials that can be tested by this test method are not limited by thickness or by strength as long as specimens are of sufficient thickness and planar size to meet the size requirements of this test method.  
1.4 A range of specimen sizes with proportional planar dimensions is provided, but size may be variable and adjusted for yield strength and applied load. Specimen thickness is a variable independent of planar size.  
1.5 Specimen configurations other than those contained in this test method may be used, provided that well-established stress intensity calibrations are available and that specimen dimensions are of sufficient size to meet the size requirements of this test method during testing.  
1.6 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.

General Information

• Status: Historical
• Publication Date: 09-Sep-2003
• ICS: 91.080.10 - Metal structures
• Technical Committee: E08 - Fatigue and Fracture
• Drafting Committee: E08.06 - Crack Growth Behavior

Relations

• Replaces: ASTM E1681-99e1 - Standard Test Method for Determining a Threshold Stress Intensity Factor for Environment-Assisted Cracking of Metallic Materials
• Effective Date: 10-Sep-2003
• Replaced By: ASTM E1681-03(2008) - Standard Test Method for Determining a Threshold Stress Intensity Factor for Environment-Assisted Cracking of Metallic Materials
• Effective Date: 01-Nov-2008
• Referred By: ASTM E1823-23 - Standard Terminology Relating to Fatigue and Fracture Testing
• Effective Date: 10-Sep-2003
• Referred By: ASTM E2818-11(2019) - Standard Practice for Determination of Quasistatic Fracture Toughness of Welds
• Effective Date: 10-Sep-2003
• Referred By: ASTM F1624-12(2018) - Standard Test Method for Measurement of Hydrogen Embrittlement Threshold in Steel by the Incremental Step Loading Technique
• Effective Date: 10-Sep-2003
• Referred By: ASTM F3122-14(2022) - Standard Guide for Evaluating Mechanical Properties of Metal Materials Made via Additive Manufacturing Processes
• Effective Date: 10-Sep-2003
• Referred By: ASTM G129-21 - Standard Practice for Slow Strain Rate Testing to Evaluate the Susceptibility of Metallic Materials to Environmentally Assisted Cracking
• Effective Date: 10-Sep-2003

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: E 1681 – 03
Standard Test Method for
Determining Threshold Stress Intensity Factor for
1
Environment-Assisted Cracking of Metallic Materials
This standard is issued under the fixed designation E1681; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope E1823 Terminology Relating to Fatigue and Fracture Test-
3
ing
1.1 This test method covers the determination of the
G1 Practice for Preparing, Cleaning, and Evaluating Cor-
environment-assisted cracking threshold stress intensity factor
4
rosion Test Specimens
parameters, K and K , for metallic materials from
IEAC EAC
G5 Standard Reference Method for Making Potentiostatic
constant-force testing of fatigue precracked beam or compact
4
and Potentiodynamic Anodic Polarization Measurements
fracture specimens and from constant-displacement testing of
G15 Terminology Relating to Corrosion and Corrosion
fatigue precracked bolt-load compact fracture specimens.
4
Testing
1.2 This test method is applicable to environment-assisted
cracking in aqueous or other aggressive environments.
3. Terminology
1.3 Materials that can be tested by this test method are not
3.1 Definitions:
limited by thickness or by strength as long as specimens are of
3.1.1 For definitions of terms relating to fracture testing
sufficient thickness and planar size to meet the size require-
used in this test method, refer to Terminology E1823.
ments of this test method.
3.1.2 For definitions of terms relating to corrosion testing
1.4 A range of specimen sizes with proportional planar
used in this test method, refer to TerminologyG15.
dimensions is provided, but size may be variable and adjusted
3.1.3 stress-corrosion cracking (SCC)—a cracking process
for yield strength and applied force. Specimen thickness is a
that requires the simultaneous action of a corrodent and
variable independent of planar size.
sustained tensile stress.
1.5 Specimen configurations other than those contained in
3.1.4 stress intensity factor threshold for plane strain
this test method may be used, provided that well-established
–3/2
environment-assisted cracking (K [FL ])—the highest
IEAC
stress intensity calibrations are available and that specimen
valueofthestressintensityfactor(K)atwhichcrackgrowthis
dimensions are of sufficient size to meet the size requirements
not observed for a specified combination of material and
of this test method during testing.
environment and where the specimen size is sufficient to meet
1.6 This standard does not purport to address all of the
requirements for plane strain as described in Test Method
safety concerns, if any, associated with its use. It is the
E399.
responsibility of the user of this standard to establish appro-
3.1.5 stress intensity factor threshold for environment-
priate safety and health practices and determine the applica-
–3/2
assisted cracking (K [FL ])—the highest value of the
EAC
bility of regulatory limitations prior to use.
stress intensity factor (K) at which crack growth is not
2. Referenced Documents observed for a specified combination of material and environ-
ment and where the measured value may depend on specimen
2.1 ASTM Standards:
2
thickness.
D1141 Specification for Substitute Ocean Water
3 3.1.6 physical crack size (a [L])—the distance from a
p
E8 Methods for Tension Testing of Metallic Materials
reference plane to the observed crack front. This distance may
E399 Test Method for Plane-Strain Fracture Toughness of
3
represent an average of several measurements along the crack
Metallic Materials
front. The reference plane depends on the specimen form, and
E647 Test Method for Measurement of Fatigue Crack
3
it is normally taken to be either the boundary or a plane
Growth Rates
containingeithertheloadlineorthecenterlineofaspecimenor
plate. The reference plane is defined prior to specimen defor-
1
This test method is under the jurisdiction ofASTM Committee E08 on Fatigue
mation.
and Fracture and is the direct responsibility of Subcommittee E08.06 on Crack
3.1.7 original crack size (a [L])—the physical crack size at
o
Growth Behavior.
the start of testing.
Current edition approved Sept. 10, 2003. Published November 2003. Originally
e1
approved in 1995. Last previous edition approved in 1999 as E1681-99 .
2
Annual Book of ASTM Standards, Vol 11.02.
3 4
Annual Book of ASTM Standards, Vol 03.01. Annual Book of ASTM Standards, Vol 03.02.
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E1681–03
3.1.8 original uncracked ligament (
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